JP6714303B1 - Two-dimensional code generation method, two-dimensional code evaluation method, two-dimensional code system, two-dimensional code generation device, and two-dimensional code evaluation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a two-dimensional code generation method, two-dimensional code evaluation method, two-dimensional code system, two-dimensional code generation device, two-dimensional code evaluation device, and two-dimensional code capable of suppressing the capacity limitation of information to be concealed. provide. A two-dimensional code generation method includes an acquisition step, a generation step, a setting step, a replacement step, and a two-dimensional code generation step. The generating step generates a data block including the constituent code word based on the target information. The setting step sets, based on preset initial arrangement information, arrangement information for arranging as the initial two-dimensional code for each of the plurality of code data included in the constituent code word. The replacing step replaces the arrangement information set in the plurality of code data. The two-dimensional code generation step generates a two-dimensional code on the basis of the arrangement information replaced by the replacement step. [Selection diagram] Figure 1

Description

The present invention, two-dimensional code generation method, the two-dimensional code evaluation method, the two-dimensional code system, the two-dimensional code generating device, and relates to the two-dimensional code evaluation equipment.

In recent years, a method of hiding secret information in a two-dimensional code such as a QR code (registered trademark) has attracted attention, and for example, a two-dimensional code generation method disclosed in Patent Document 1 has been proposed.

In the disclosed technology of Patent Document 1, an information body containing first information, a first data code word having a termination code, and a padding code word, and an error capable of detecting and correcting an error in the first data code word Determining a data block including a correction code word, and determining a replaced data block in which a part of the data block is replaced with a second data code word including second information; Generating a two-dimensional code on the basis of the information body of the first data code word or the error correction code word in the replacement object to be replaced with the second data code word. At least included.

JP, 2016-189197, A

Here, in the disclosed technique of Patent Document 1, it is premised that a part of the first data code word and the error correction code word is replaced with a second data code word (corresponding to a concealment information word). Also, the replacement of the second data code word is performed within a range that does not exceed the number of error corrections of the data block. That is, the number of second data code words is limited to the number of error corrections of the data block or less. Therefore, the problem is the limitation of the amount of information to be kept secret.

Therefore, the present invention has been devised in view of the above-mentioned problems, and an object of the present invention is to provide a two-dimensional code generation method and two-dimensional code evaluation method capable of suppressing the capacity limit of information to be concealed. method, the two-dimensional code system, the two-dimensional code generating device, and to provide a two-dimensional code evaluation equipment.

A two-dimensional code generation method according to a first aspect of the invention includes an acquisition step of acquiring target information to be coded, a generation step of generating a data block including a constituent code word based on the content of the target information, Based on the set initial arrangement information, a setting step for setting arrangement information for arranging as an initial two-dimensional code for each of the plurality of code data included in the constituent code word, and setting for the plurality of code data And a two-dimensional code generating step of generating a two-dimensional code based on the arrangement information exchanged by the exchanging step.

A two-dimensional code generation method according to a second invention is the two-dimensional code generation method according to the first invention, wherein the replacing step sets the code data within a range exceeding an error correction number in one or more of the data blocks among the plurality of data blocks. It is characterized in that the arranged arrangement information is replaced.

The two-dimensional code generation method according to a third aspect is the second aspect, wherein the replacing step refers to arrangement conversion information having information regarding replacement of the arrangement information, and the arrangement information set in a plurality of the code data. It is characterized by replacing.

A two-dimensional code generation method according to a fourth aspect is the second aspect, wherein the replacing step refers to layout conversion information based on at least one of format information and model number information used when generating the initial two-dimensional code , It is characterized in that the arrangement information set in a plurality of the code data is replaced.

A two-dimensional code generation method according to a fifth aspect is the second aspect, wherein the acquisition step acquires specific information associated with the target information, and the replacement step refers to arrangement conversion information based on the specific information. , The arrangement information set in a plurality of the code data is replaced.

A two-dimensional code generation method according to a sixth invention is the method according to any one of the third to fifth inventions, wherein the arrangement conversion information relates to a recognition order of the arrangement information when deriving the code data from the two-dimensional code. It is characterized by having information.

The two-dimensional code generation method according to a seventh invention is the method according to any one of the third invention to the fifth invention, wherein the arrangement conversion information is the arrangement set in a plurality of the code data included in one constituent code word. It is characterized by having information for exchanging information.

A two-dimensional code generation method according to an eighth aspect is the third aspect of the invention, wherein the arrangement conversion information is the code data included in a first constituent code word among a plurality of constituent code words. It is characterized in that it has information for replacing the first arrangement information set in (1) with the second arrangement information set in the code data included in the second constituent code word.

The two-dimensional code generation method according to a ninth invention is the method according to any one of the third invention to the fifth invention, wherein, after the setting step, the initial code is set based on the arrangement information set for each of the plurality of code data. It is characterized by further comprising an initial two-dimensional code generation step of generating a dimensional code.

A two-dimensional code generation method according to a tenth invention is the ninth invention, wherein the arrangement conversion information has information for changing the code data arranged at a specific position in the initial two-dimensional code to another position. It is characterized by

A two-dimensional code generation method according to an eleventh invention is the ninth invention, wherein the arrangement conversion information is the initial two-dimensional code, wherein the code data arranged in each row or column is arranged in another row or column. It is characterized by having information to be changed.

A two-dimensional code generation method according to a twelfth invention is the ninth invention, wherein the arrangement conversion information has information for arranging the arrangement position of the code data in the initial two-dimensional code along a row or a column. It is characterized by

The two-dimensional code generation method according to a thirteenth invention is the method according to any one of the third to twelfth inventions, wherein the two-dimensional code generation step is based on preset mask information and is at least one of the plurality of code data. It is characterized in that it has a mask processing step for reversing the parts.

The two-dimensional code generation method according to a fourteenth invention is the method according to any one of the third to thirteenth inventions, wherein the replacing step specifies the arrangement information to be replaced based on an error correction codeword included in the data block. It is characterized by doing.

A two-dimensional code generation method according to a fifteenth invention is characterized in that, in any one of the third to fourteenth inventions, the format of the two-dimensional code is a QR code format.

A two-dimensional code evaluation method according to a sixteenth invention is a two-dimensional code evaluation method for evaluating the two-dimensional code generated by the two-dimensional code generation method according to any one of the third to fifteenth inventions. It is characterized by including a reading step of reading a dimension code and a deriving step of deriving the target information for the two-dimensional code by referring to the arrangement conversion information.

Two-dimensional code system according to the first 7 invention, an acquisition unit configured to acquire target information to be coded, based on the contents of the object information, generating means for generating a data block including a structure code word, previously Setting means for setting arrangement information for arranging as an initial two-dimensional code for each of the plurality of code data included in the constituent code word based on the set initial arrangement information, and setting for the plurality of code data And a two-dimensional code generation means for generating a two-dimensional code based on the arrangement information exchanged by the exchange means.

Two-dimensional code system according to a first eighth invention, in the first 7 invention is characterized and reading means for reading the two-dimensional code, further comprising a derivation means for deriving the target information for the two-dimensional code ..

A two-dimensional code generation device according to a nineteenth aspect of the present invention includes an acquisition unit that acquires target information to be coded, a generation unit that generates a data block including a constituent code word based on the content of the target information, Based on the set initial arrangement information, a setting unit that sets arrangement information for arranging as an initial two-dimensional code for each of the plurality of code data included in the constituent code word, and sets the plurality of code data And a two-dimensional code generation unit that generates a two-dimensional code based on the arrangement information exchanged by the exchange unit.

Two-dimensional code evaluation apparatus according to the second 0 invention is a two-dimensional code evaluation apparatus for evaluating the two-dimensional code generated by the two-dimensional code generating apparatus in the nineteenth invention, the reading unit reading the two-dimensional code And a derivation unit that derives the target information for the two-dimensional code.

According to the first invention to the fifteenth invention, the two-dimensional code generating step generates a two-dimensional code based on the arrangement information replaced by the replacing step. Therefore, it is possible to perform the non-readable processing accompanying the replacement of the placement information while maintaining the data capacity based on the target information that can be set in the conventional two-dimensional code format. As a result, it is possible to suppress the capacity limit of the information to be concealed.

In particular, according to the second aspect of the invention, the replacing step replaces the arrangement information set in the code data within a range exceeding the number of error corrections in one or more data blocks among the plurality of data blocks. Therefore, it is possible to make it more difficult to derive the generated two-dimensional code by using the conventional two-dimensional code reading device. This makes it possible to increase the confidentiality of the target information.

Particularly, according to the third aspect of the invention, the replacing step replaces the arrangement information set in the plurality of code data by referring to the arrangement conversion information having the information about the arrangement information replacement. Therefore, it is possible to restrict the derivation of the two-dimensional code only to a specific terminal having the arrangement conversion information. This makes it possible to further increase the confidentiality of the target information.

Particularly, according to the fourth aspect of the invention, the replacing step replaces the arrangement information set in the plurality of code data by referring to the arrangement conversion information based on at least one of the format information and the model number information. Therefore, it is possible to restrict the derivation of the two-dimensional code by using the format information or model number information used when the conventional two-dimensional code is generated. This makes it possible to further increase the confidentiality of the target information.

Particularly, according to the fifth aspect of the invention, the replacing step replaces the arrangement information set in the plurality of code data with reference to the arrangement conversion information based on the specific information. Therefore, the content of the specific information associated with the target information can be changed depending on the content of the target information to be concealed, and the derivation of the two-dimensional code can be restricted according to the importance of the concealment or the like. This makes it possible to easily change the degree of confidentiality of the target information.

Particularly, according to the ninth aspect, the initial two-dimensional code generating step generates the initial two-dimensional code corresponding to the initial arrangement information based on the arrangement information set for each of the plurality of code data after the setting step. .. Therefore, for example, even when the initial two-dimensional code is already generated by another terminal or the like, it is possible to generate a highly confidential two-dimensional code. As a result, it becomes possible to expand the conditions for data that can generate a two-dimensional code.

Particularly, according to the twelfth aspect, the arrangement conversion information has information for turning the position where the code data is arranged in the initial two-dimensional code along the row or the column. Therefore, when replacing the arrangement information, one arrangement conversion information can be used regardless of the format of the initial two-dimensional code. As a result, it becomes easy to generate the two-dimensional code C with enhanced confidentiality for various initial two-dimensional code formats. Further, it is not necessary to set the placement information for each format of the initial two-dimensional code, and it is possible to enhance the confidentiality with the minimum information.

Particularly, according to the sixteenth invention, the deriving step derives the target information for the two-dimensional code by referring to the arrangement conversion information. Therefore, it is possible to realize the derivation of the two-dimensional code using the arrangement conversion information.

According to the first 7 invention and the first eighth invention, the two-dimensional code generating means on the basis of the interchanged arrangement information by interchanging means, for generating a two-dimensional code. Therefore, it is possible to perform the non-readable processing accompanying the replacement of the placement information while maintaining the data capacity based on the target information that can be set in the conventional two-dimensional code format. As a result, it is possible to suppress the capacity limit of the information to be concealed.

In particular, according to the first 8 invention, deriving means derives the target information for the two-dimensional code. Therefore, it is possible to realize the derivation of the two-dimensional code.

According to the nineteenth aspect , the two-dimensional code generation unit generates the two-dimensional code based on the arrangement information replaced by the replacement unit. Therefore, it is possible to perform the non-readable processing accompanying the replacement of the placement information while maintaining the data capacity based on the target information that can be set in the conventional two-dimensional code format. As a result, it is possible to suppress the capacity limit of the information to be concealed.

In particular, according to the second 0 invention, deriving unit derives the target information for the two-dimensional code. Therefore, it is possible to realize the derivation of the two-dimensional code.

FIG. 1 is a schematic diagram showing an example of a two-dimensional code according to the first embodiment. FIG. 2 is a schematic diagram showing an example of the two-dimensional code system 100 according to the first embodiment. FIG. 3 is a schematic diagram showing an example of the two-dimensional code generation method and the two-dimensional code evaluation method according to the first embodiment. FIG. 4A is a schematic diagram showing an example of the configuration of the two-dimensional code generation device in the first embodiment, and FIG. 4B is an example of the function of the two-dimensional code generation device in the first embodiment. It is a schematic diagram which shows. FIG. 5A is a schematic diagram showing an example of the placement information, and FIG. 5B is a schematic diagram showing an example of the placement information after the replacement. FIG. 6A is a schematic diagram showing an example of arrangement information before and after replacement, and FIG. 6B is a schematic diagram showing an example of arrangement conversion information. FIG. 7A is a schematic diagram showing an example of the configuration of the two-dimensional code evaluation apparatus according to the first embodiment, and FIG. 7B is an example of the function of the two-dimensional code evaluation apparatus according to the first embodiment. It is a schematic diagram which shows. FIG. 8A and FIG. 8B are flowcharts showing an example of the operation of the two-dimensional code system in the first embodiment. FIG. 9 is a flowchart showing a modified example of the operation of the two-dimensional code system according to the first embodiment. 10A to 10C are schematic diagrams showing an example of a two-dimensional code generation method in the second embodiment. FIG. 11A is a schematic diagram showing an example of the layout conversion information in the second embodiment, and FIG. 11B is a schematic diagram showing a first modification of the layout conversion information in the second embodiment. .. FIG. 12 is a schematic diagram showing a second modified example of the layout conversion information in the second embodiment. FIG. 13 is a flowchart showing an example of the operation of the two-dimensional code system in the second embodiment.

Hereinafter, with reference to the drawings, an example of a two-dimensional code generation method, a two-dimensional code evaluation method, a two-dimensional code system, a two-dimensional code generation device, a two-dimensional code evaluation device, and a two-dimensional code in an embodiment to which the present invention is applied While explaining.

(First embodiment)
With reference to FIGS. 1 to 3, the two-dimensional code C, the two-dimensional code system 100, the two-dimensional code generation device 1, the two-dimensional code evaluation device 2, the two-dimensional code generation method, and the two-dimensional code evaluation according to the first embodiment. An example of the method will be described. FIG. 1 is a schematic diagram showing an example of a two-dimensional code in this embodiment. FIG. 2 is a schematic diagram showing an example of the two-dimensional code system 100 according to this embodiment. FIG. 3 is a schematic diagram showing an example of a two-dimensional code generation method and a two-dimensional code evaluation method according to this embodiment.

<Two-dimensional code C>
The two-dimensional code C in this embodiment indicates the format of a QR code (registered trademark), and also the format of a matrix type two-dimensional code such as a data matrix code, a maxi code, a Veri code, or a CP code, or a stack type. A well-known two-dimensional code format, such as the two-dimensional code format of FIG. Note that the "format" refers to the external compliance rules regarding the arrangement of the light and dark modules that represent the information bits, as well as the code such as the model number that is set according to the information capacity in the given compliance rules. Indicates the external scale.

Part of the method for generating and evaluating the two-dimensional code C is, for example, JIS X 0510:2018 “Information technology-Automatic recognition and data acquisition technology-QR code barcode symbol system specification” and ISO/IEC 18004:2015 “Information. Technology-automatic identification and data collection technology-QR code bar code symbol specifications" and the like. Hereinafter, a publicly known standard concerning the format of the two-dimensional code will be the target standard.

The two-dimensional code C is generated based on a QR code symbol of model number “2”, as shown in FIG. 1, for example, and is arbitrary according to the content of the target information to be encoded and the use of the two-dimensional code C. It may be generated on the basis of the model number or the format of an arbitrary two-dimensional code.

The two-dimensional code C has, for example, a functional pattern and a coding area. The function pattern indicates a pattern required for position search and characteristic identification (processing for obtaining external data) in the two-dimensional code C, and for example, to assist the encoding of the two-dimensional code C in the module. Used. The coding area indicates an area in which necessary information is written.

The functional pattern has, for example, a position detection pattern FP, a separation pattern SP, a timing pattern TP, an alignment pattern AP, and a quiet zone QZ.

The position detection pattern FP indicates a pattern arranged in at least three corners of the two-dimensional code C. For example, when reading, by identifying the three position detection patterns FP, the direction and position of the two-dimensional code C can be correctly recognized.

The separation pattern SP is a 1-module-wide bright module arranged around the position detection pattern FP. By disposing the separation pattern SP, the position detection pattern FP can be distinguished from the functional pattern and the like.

The timing pattern TP is a pattern in which a dark module and a bright module are alternately arranged in a straight line for each module M. Since the number of modules M in the two-dimensional code C can be recognized by the timing pattern TP, for example, the model number of the QR code can be identified. The module M is a unit cell forming the two-dimensional code C. For example, 1 bit corresponds to 1 module.

The alignment pattern AP is a pattern arranged at a position determined by the model number of the QR code. The alignment pattern AP assists the search for the position in the two-dimensional code C, for example.

The quiet zone QZ is a bright module area of at least 4 module width provided around the QR code.

The coding area has, for example, a data code word placement area DP, an error correction code word placement area EP, and a format information placement area FI. For example, the coding area may have a model number information arrangement area VI. The model number information arrangement area VI is provided when a QR code having a large model number is used, for example, and the QR code of the model number "2" shown in FIG. 1 does not have the model number information arrangement area VI.

In the data code word placement area DP and the error correction code word placement diamond, EP, a constituent code word generated based on actual data (target information) is placed. The constituent code word includes a data code word and an error correction code word (hereinafter referred to as a correction code).

In the data code word placement area DP, a data code word generated based on the content of the target information is placed. In the error correction code word placement area EP, a correction code word used when data cannot be derived is placed. As a case where the data cannot be derived, for example, there is a case where an ambiguous portion or a missing portion occurs due to stain or the like in the portion corresponding to the constituent code word.

In the two-dimensional code C in the present embodiment, for example, the correction code word may be arranged in the data code word arrangement area DP and the data code word may be arranged in the error correction code word arrangement area EP. That is, the data code word arrangement area DP and the error correction code word arrangement area EP indicate areas defined by the conventional technology such as the target standard.

For example, in the above-described target standard, the data code words and the data code word layout order (initial layout information) are set in the data code word layout area DP and the error correction code word layout area EP (for example, rules such as the target standard). , The data code words are arranged in the order of position D1, position D2,..., Position D28, and the correction code words are arranged in order of position E1, position E2,. Place it, etc.). Therefore, a conventional two-dimensional code (initial two-dimensional code) can be generated by performing a process conforming to the target standard. As a result, data is derived (decoded) from the initial two-dimensional code by using a general-purpose reader based on the target standard.

On the other hand, in the two-dimensional code C in the present embodiment, for example, the constituent code words are arranged in a different order or arrangement area from the data code word arrangement area DP and the error correction code word arrangement area EP set in the target standard or the like. Can be placed at. In this case, it is possible to prevent the derivation (decoding) of data by using a general-purpose reading device based on the target standard. Therefore, the two-dimensional code C in the present embodiment can be shown in a state where the non-readable processing is performed on the entire coding area (a state in which the target information is hidden). As a result, it becomes possible to suppress the capacity limitation of the target information to be concealed as compared with the related art.

In the format information arrangement area FI, format information necessary for decoding the coding area is arranged. In the format information placement area FI, information about the error correction level applied to the two-dimensional code C may be placed, for example, information about the standard mask pattern used may be placed. That is, the format information has, for example, information about an error correction level and information about a standard mask pattern (for example, a mask pattern in the target standard).

In the model number information arrangement area VI, for example, the model number information given to the QR code of 7 type or more is arranged. The model number information arrangement area VI is, for example, on the upper side of the timing pattern TP, immediately to the left of the separation pattern SP adjacent to the upper right position detection pattern FP, and on the left side of the timing pattern TP, to the separation pattern SP adjacent to the lower left position detection pattern FP. Shows the area immediately above.

<Two-dimensional code system 100, two-dimensional code generation method, two-dimensional code evaluation method>
The two-dimensional code system 100 is used to generate the two-dimensional code C, and may be used to evaluate the two-dimensional code C, for example. The two-dimensional code system 100 includes a two-dimensional code generation device 1 as shown in FIG. 2, for example. The two-dimensional code system 100 may include, for example, the two-dimensional code evaluation device 2, or may include, for example, the server 3. The two-dimensional code generation device 1, the two-dimensional code evaluation device 2, and the server 3 are connected, for example, via a communication network 4 as necessary.

In the two-dimensional code system 100, for example, the two-dimensional code generation method (encoding process) and the two-dimensional code evaluation method (decoding process) shown in FIG. 3 can be implemented.

In the two-dimensional code generation method, for example, the two-dimensional code generation device 1 acquires a character string (target information to be coded). The two-dimensional code generation device 1 generates one or more RS blocks (Reed-Solomon blocks: hereinafter described as data blocks) based on target information, and sets a plurality of code data included in each data block to, for example, a target standard. Set the base placement information. The two-dimensional code generation device 1 generates the two-dimensional code C after replacing the arrangement information set in each code data. As a result, the two-dimensional code C is generated. The two-dimensional code C generated by the two-dimensional code generation device 1 can be output by being printed on, for example, a paper medium.

In the two-dimensional code evaluation method, for example, the two-dimensional code evaluation device 2 reads the two-dimensional code C and derives the target information. As a result, a user or the like having the two-dimensional code evaluation device 2 can recognize the target information. Note that the terminal 9 (for example, a general-purpose reading device) different from the two-dimensional code evaluation device 2 can read the two-dimensional code C (the process of acquiring external data), but the read two-dimensional code The target information cannot be derived from C. That is, the two-dimensional code C can prevent derivation of the target information using the terminal 9. Therefore, for example, the target information can be notified only to a specific user.

<Two-dimensional code generator 1>
Next, an example of the two-dimensional code generation device 1 according to the present embodiment will be described with reference to FIG. FIG. 4A is a schematic diagram showing an example of the configuration of the two-dimensional code generation device 1 in this embodiment, and FIG. 4B is an example of the function of the two-dimensional code generation device 1 in this embodiment. It is a schematic diagram which shows.

As the two-dimensional code generation device 1, for example, an electronic device such as a laptop (notebook) PC, a desktop PC, a smartphone, or a tablet terminal is used. The two-dimensional code generation device 1 includes a housing 10, a CPU (Central Processing Unit) 101, a ROM (Read Only Memory) 102, and a RAM (Random Access Memory) 103, as shown in FIG. 4A, for example. The storage unit 104, the I/Fs 105 to 107, the input mechanism 108, and the output mechanism 109 are provided. The components 101 to 107 are connected by the internal bus 110.

The CPU 101 controls the entire two-dimensional code generation device 1. The ROM 102 stores the operation code of the CPU 101. The RAM 103 is a work area used when the CPU 101 operates. The storage unit 104 stores various kinds of information such as information on target standards. As the storage unit 104, for example, a data storage device such as an SSD (Solid State Drive) in addition to an HDD (Hard Disk Drive) is used.

The I/F 105 is an interface for transmitting and receiving various kinds of information with the two-dimensional code evaluation device 2, the server 3, and the like via the communication network 4 as necessary. The I/F 106 is an interface for transmitting and receiving information to and from the input mechanism 108. The I/F 107 is an interface for transmitting/receiving various information to/from the output mechanism 109.

For example, a keyboard is used as the input mechanism 108, and a user or the like of the two-dimensional code generation device 1 can input information (target information) to be included in the two-dimensional code C or the two-dimensional code generation device 1 via the input mechanism 108. Enter the control command of.

The output mechanism 109 outputs various information stored in the storage unit 104, the two-dimensional code C, or the like. A display is used as the output mechanism 109. For example, in the case of a touch panel type, it is provided integrally with the input mechanism 108. A publicly known printing device such as a printer may be used as the output mechanism 109 so that the two-dimensional code C can be printed on a paper medium.

The two-dimensional code generation device 1 includes an acquisition unit 11, a generation unit 12, a setting unit 13, a replacement unit 14, and a two-dimensional code generation unit 15, as shown in FIG. 4B, for example. The storage unit 16 and the output unit 17 may be provided. Each function shown in FIG. 4B is realized by the CPU 101 executing a program stored in the storage unit 104 or the like using the RAM 103 as a work area. For example, the two-dimensional code generation device 1 performs two-dimensional processing. Each function may be provided by installing a program for executing the code generation method. In addition, a part of each function may generate (encode) the two-dimensional code C by a method according to the above-mentioned target standard or a known technique.

<<Acquisition unit 11>>
The acquisition unit 11 acquires target information. The acquisition unit 11 may acquire the target information input from the input mechanism 108, or may acquire the target information from the two-dimensional code evaluation device 2 or another terminal 9 via the communication network 4, for example.

The acquisition unit 11 acquires, for example, specific information associated with the target information. The acquisition unit 11 acquires the target information at the same time as the target information, and may acquire the target information at a different timing (for example, the target information is acquired from the terminal 9 and the specific information is acquired via the input mechanism 108). It may be acquired from (acquisition). The specific information includes, for example, a password, confidential information such as a confidential level of the target information, and also includes, for example, a user ID of a service using the two-dimensional code C and information on a user terminal.

<<<Generator 12>>
The generation unit 12 generates one or more data blocks including the constituent code word based on the target information. The constituent code includes a data code word and a correction code word, and for example, a data block is generated like block 1 and block 2 shown in FIG.

The data code word and the correction code word include a plurality of code data. The code data is represented by a binary value such as 0 or 1. Note that the data blocks shown in FIG. 5A and the like are examples, and the number of code data contained in the data code word and the correction code word and the number of data blocks can be set by, for example, a method conforming to the target standard. it can.

The data code word includes, for example, an information body, a terminal code, and a padding code word, and each is represented by code data. The information body is generated based on the target information to be encoded. The terminal code is a code indicating the end of the information body. The padding code word is a temporary code word (filling code word) used for the purpose of filling an empty code word portion when the total number of code words in the information body is less than the capacity of the two-dimensional code C.

The correction code word includes, for example, an RS (Reed Solomon) code and is represented by code data. The RS code is a code used for error correction in units of data blocks.

<<Setting section 13>>
The setting unit 13 sets the arrangement information for arranging as the initial two-dimensional code for each of the plurality of code data based on the preset initial arrangement information. The initial arrangement information indicates, for example, information regarding the arrangement order of each code data in the target standard. The arrangement information is set in each code data according to the arrangement order shown in the data code word arrangement area DP and the error correction code word arrangement area EP shown in FIG. 1, for example.

For example, the arrangement information a, b, c, d, e corresponding to the position D1 is set in the code data included in the data code word of block 1, and the code data included in the data code word of block 2 is set to Arrangement information f, g, h, i, j corresponding to the position D2 is set. Further, for example, the arrangement information A, B, C, and D corresponding to the position E1 is set in the code data included in the correction code word of the block 1, and the position information is included in the code data included in the correction code word of the block 2. Arrangement information E, F, G, H corresponding to E2 is set.

<<Replacement part 14>>
The replacement unit 14 replaces the arrangement information set in the plurality of code data. The transposing unit 14 transposes, for example, the arrangement information set in each code data included in a constituent code word over a plurality of constituent codes, or may replace it within one constituent code word.

The replacing unit 14 replaces the arrangement information set in each code data included in a plurality of data code words, for example, and may replace the arrangement information set in each code data included in a plurality of correction code words, for example. .. The replacement unit 14 may replace the placement information set in the code data included in the plurality of data blocks, for example, the placement information set in the code data included in the data code word and the correction information included in the correction code word. The arrangement information set in the code data may be replaced. That is, the replacement unit 14 performs the replacement process for the arrangement information, unlike the process of inverting the value of the code data such as that by the XOR operation.

For example, as shown in FIG. 5B, the replacement unit 14 may replace at least a part of the layout information among the layout information set in the plurality of code data. In FIG. Information is shown in italics and underlined.

For example, the replacement unit 14 may replace the arrangement information set in the code data within a range in which the number of error corrections in one or more data blocks among the plurality of data blocks is exceeded. In this case, it is possible to make it more difficult to derive the generated two-dimensional code by using the conventional two-dimensional code reading device (for example, the terminal 9).

For example, the replacement unit 14 may replace the layout information set in the plurality of code data with reference to the layout conversion information. The layout conversion information has information about replacement of layout information, and has information about setting of layout different from the content (initial layout information) shown in the target standard described above.

The layout conversion information is set based on the format information, for example. The replacement unit 14 refers to a format information table that associates, for example, a plurality of format information and information related to replacement of the placement information with respect to each format information (for example, a replacement rule or information that identifies a replacement target) The conversion information may be set. In this case, the replacement unit 14 sets the layout conversion information for the format information based on the format information corresponding to the format of the data block or the like generated by the generation unit 12. The format information table is stored in advance in, for example, the storage unit 104, and is retrieved as needed.

The layout conversion information may be set based on at least a part of a plurality of data included in the format information, for example. For example, information corresponding to arbitrary n bits of a plurality of data included in the format information may be associated with the arrangement conversion information. In this case, if the format information is 15 bits×2, ( ₁₅ C _n ). ^Two conversion patterns can be defined. Thereby, for example, when a plurality of two-dimensional code generation devices 1 are used, each two-dimensional code generation device 1 selects the arrangement conversion information based on the information corresponding to n bits of the different format information, so that the same format is obtained. It is possible to realize the generation of the two-dimensional code C with reference to different layout conversion information for each information.

The layout conversion information is set based on the model number information, for example. The replacement unit 14 may set the layout conversion information by referring to, for example, a model number information table that associates a plurality of model number information with information about replacement of layout information for each model number information. In this case, the replacement unit 14 sets the layout conversion information for the model number information based on the model number information corresponding to the format of the data block generated by the generation unit 12. The model number information table is stored in advance in the storage unit 104, for example, and is retrieved as needed.

The layout conversion information may be set based on at least a part of the plurality of data included in the model number information, for example. For example, information corresponding to arbitrary n bits of the plurality of data included in the model number information may be associated with the layout conversion information. Thereby, for example, when a plurality of two-dimensional code generation devices 1 are used, each two-dimensional code generation device 1 selects layout conversion information based on information corresponding to n bits of model number information different from each other, whereby the same model number is selected. It is possible to realize the generation of the two-dimensional code C with reference to different layout conversion information for each information.

In addition, for example, the layout conversion information may be set based on the format information and the model number information. In this case, in addition to referring to the format information table and model number information table described above, for example, a table obtained by combining the tables may be referred to.

The arrangement conversion information may be set based on the specific information, for example. The replacement unit 14 may set the layout conversion information by referring to, for example, a specific information table in which a plurality of pieces of specific information are associated with information about the replacement of the layout information for each piece of specific information. The specific information table is stored in advance in the storage unit 104, for example, and is retrieved as needed.

In addition to the above, for example, the specific information may include information regarding replacement of the placement information. In this case, the replacement unit 14 extracts the information on the replacement of the placement information from the specific information and sets it as the placement conversion information. Further, the specific information may include layout conversion information.

The arrangement conversion information may be set in advance, for example. In this case, the layout conversion information is stored in, for example, the storage unit 104, and is retrieved as needed. In particular, when the rule for replacing the arrangement information is used as the arrangement conversion information, one arrangement conversion information can be used regardless of the format of the two-dimensional code. Therefore, the amount of data stored in the storage unit 104 or the like can be minimized. As a rule for replacing the arrangement information, for example, a rule for inverting a plurality of pieces of arrangement information in one data block and replacing the associated code data is used.

The arrangement conversion information has information for replacing arrangement information set in a plurality of code data included in one constituent code word, for example. The arrangement conversion information has information for replacing arrangement information set in a plurality of code data included in at least a part of one data code word, for example. Further, the arrangement conversion information may include information for replacing arrangement information set in a plurality of code data included in at least a part of the data code word and the correction code word included in one constituent code, for example. ..

For example, when deriving the target information from the two-dimensional code C by referring to the arrangement conversion information, it is possible to easily derive the target information by referring to the arrangement conversion information. Further, by storing the layout conversion information only in a specific terminal (for example, the two-dimensional code evaluation device 2), it becomes difficult to derive the target information using the other terminal 9, and the confidentiality of the target information can be improved. It will be possible.

The arrangement conversion information is, for example, the arrangement information (first arrangement information) set in the code data included in one constituent code word (first constituent code word) among the plurality of constituent code words, and the other constituent code words. It has information to replace the placement information (second placement information) set in the code data included in the (second configuration code word). In this case, the confidentiality of the generated two-dimensional code C can be improved. It should be noted that it is arbitrary which of the data code word and the correction code word includes each piece of arrangement information to be replaced.

As the arrangement information, for example, among the plurality of data code words, the arrangement information set in all code data included in one data code word (first data code word) is used as another data code word (second data code word). Information to replace the arrangement information set in the code data included in the word). At this time, the number of code data included in the first data code word is less than or equal to the number of code data included in the second data code word.

In this case, for example, as shown in FIG. 6A, the replacement unit 14 replaces the arrangement information a, b, c, d, e set in the code data included in the first data code word with the second data code. The arrangement information f, g, h, i, j set in the code data included in the word is replaced. At this time, for example, the arrangement information set in the code data included in the second data code word is set in the code data included in another data code word in addition to the arrangement information a, b, c, d, and e. It may be replaced with the arranged information. The same applies to the case where a plurality of "correction code words" are used instead of the above-mentioned plurality of "data code words", and a description thereof will be omitted.

For example, the arrangement information set in all the code data included in the first data code word may be replaced with the arrangement information set in the code data included in one correction code word. At this time, the number of pieces of code data included in the first data code word is equal to or less than the number of pieces of code data included in one correction code word. Further, for example, the arrangement information set in all the code data included in one correction code word may be replaced with the arrangement information set in the code data included in the first data code word. At this time, the number of pieces of code data included in one correction code word is equal to or less than the number of pieces of code data included in the first data code word.

The arrangement conversion information has information regarding the recognition order of the arrangement information when deriving the code data from the two-dimensional code C, for example. That is, the layout conversion information has information regarding a recognition order of layout information that is different from the conventional one. Therefore, the replacement unit 14 replaces the placement information set in each code data according to the recognition order of the placement information included in the placement conversion information.

In this case, for example, as shown in FIG. 6B, the conventional recognition order of the arrangement information is “code data to be recognized first: arrangement information “a (1 row and 1 column)” and a code to be recognized second. When the data is the arrangement information “b (1 row 2 column)”..., the recognition order of the arrangement information included in the arrangement conversion information is “code data to be recognized first: arrangement information “h (2 rows 1 Column)”, the second recognized code data: arrangement information “g (3 rows and 3 columns)”,... Therefore, the replacement unit 14 refers to the layout conversion information and replaces the layout information “a” set in the code data with the layout information “h”, for example. As a result, it is possible to generate a highly confidential two-dimensional code C.

Note that, for example, the replacement unit 14 may replace the placement information without referring to the placement conversion information. In this case, the replacement unit 14 randomly replaces the placement information and stores the information (history information) related to the replaced history in the storage unit 104 or the like. Thereby, when deriving the target information from the two-dimensional code C, for example, the target information can be easily derived based on the history information. Further, by storing the history information only in a specific terminal (for example, the two-dimensional code evaluation device 2), it becomes difficult to derive the target information using the other terminal 9, and the confidentiality of the target information can be improved. Becomes

<<two-dimensional code generation unit 15>>
The two-dimensional code generation unit 15 generates the two-dimensional code C based on the arrangement information replaced by the replacement unit 14. The two-dimensional code generation unit 15 generates the two-dimensional code C by a generation method that conforms to the target standard, for example. At this time, since the placement information has been swapped by the swapping unit 14, at least some of the code data included in the plurality of data blocks are placed at positions different from those in the related art.

<<<storage section 16>>
The storage unit 16 retrieves various types of data such as the information about the target standard, the initial placement information, the placement conversion information, and the like stored in the storage unit 104 as necessary. The storage unit 16 stores the various data acquired or generated by the configurations 11 to 15 and 17 in the storage unit 104 as necessary.

<<Output unit 17>>
The output unit 17 outputs the generated two-dimensional code C. For example, when a printing device is used as the output mechanism 109, the output unit 17 outputs data for printing the two-dimensional code C to the output mechanism 109. For example, when a display is used as the output mechanism 109, the output unit 17 outputs the data for displaying the two-dimensional code C to the output mechanism 109. The output unit 17 may output the data of the two-dimensional code C to another terminal such as the two-dimensional code evaluation device 2 via the communication network 4, for example.

<Two-dimensional code evaluation device 2>
Next, with reference to FIG. 7, an example of the two-dimensional code evaluation apparatus 2 in the present embodiment will be described. FIG. 7A is a schematic diagram showing an example of the configuration of the two-dimensional code evaluation apparatus 2 in this embodiment, and FIG. 7B is an example of the function of the two-dimensional code evaluation apparatus 2 in this embodiment. It is a schematic diagram which shows.

As the two-dimensional code evaluation device 2, for example, similar to the two-dimensional code generation device 1, electronic devices such as a laptop (notebook) PC, a desktop PC, a smartphone, a tablet terminal, and a two-dimensional code read-only terminal (two-dimensional code reader). Is used. For example, as shown in FIG. 7A, the two-dimensional code evaluation device 2 includes a housing 20, a CPU 201, a ROM 202, a RAM 203, a storage unit 204, I/Fs 205 to 207, an input mechanism 208, and And an output mechanism 209. The components 201 to 207 are connected by the internal bus 210.

The CPU 201 controls the entire two-dimensional code evaluation device 2. The ROM 202 stores the operation code of the CPU 201. The RAM 203 is a work area used when the CPU 201 operates. The storage unit 204 stores various kinds of information such as information regarding the target standard. As the storage unit 204, a data storage device such as an SSD is used in addition to the HDD, for example.

The I/F 205 is an interface for transmitting and receiving various kinds of information with the two-dimensional code generation device 1, the server 3, and the like via the communication network 4 as necessary. The I/F 206 is an interface for transmitting/receiving information to/from the input mechanism 208. The I/F 207 is an interface for transmitting and receiving various information to and from the output mechanism 209.

A known image pickup device such as a camera is used as the input mechanism 208, and a user of the two-dimensional code evaluation apparatus 2 reads the two-dimensional code C via the input mechanism 208 and includes it in the two-dimensional code C. Check the target information to be displayed.

The output mechanism 209 outputs various information stored in the storage unit 204 or target information derived from the two-dimensional code C. A display is used as the output mechanism 209, and in the case of a touch panel type, for example, it is provided integrally with the character input unit and the screen selection unit of the input mechanism 208.

The two-dimensional code generation device 1 includes a reading unit 21 and a deriving unit 22, for example, as illustrated in FIG. 7B, and may include, for example, a storage unit 23 and an output unit 24. Note that each function shown in FIG. 7B is realized by the CPU 201 executing a program stored in the storage unit 204 or the like using the RAM 203 as a work area. For example, the two-dimensional code evaluation apparatus 2 is two-dimensional. Each function may be provided by installing a program for executing the code evaluation method. Further, a part of each function may evaluate the two-dimensional code C by a method according to the above-mentioned target standard or a known technique.

<<reading section 21>>
The reading unit 21 reads the two-dimensional code C. The reading unit 21 reads the two-dimensional code C by capturing an image of the two-dimensional code C via the input mechanism 208, for example. The reading unit 21 may acquire the data of the two-dimensional code C from the two-dimensional code generation device 1 or the like via the communication network 4, for example.

<<deriving unit 22>>
The deriving unit 22 derives target information for the two-dimensional code C. The derivation unit 22 refers to, for example, the arrangement conversion information, and extracts a plurality of data blocks based on the two-dimensional code C (for example, FIG. 5B) and a plurality of data blocks before the arrangement information is replaced from the arrangement information (for example, FIG. 5B). (A)) and the arrangement information are extracted. After that, the deriving unit 22 derives the target information from the plurality of data blocks by a deriving method that conforms to the target standard, for example. The derivation unit 22 may derive the target information after converting the two-dimensional code C into the initial two-dimensional code by referring to the arrangement conversion information, for example.

The deriving unit 22 is referred to when the two-dimensional code C is generated based on, for example, at least one of the format information arranged in the format information arrangement area FI of the two-dimensional code C and the model number information arranged in the model number information arrangement area VI. The layout conversion information may be specified. In this case, for example, by storing at least one of the format information table, the model number information table, the table combining each table, and the rule for exchanging the layout information in the storage unit 204 in advance, the two-dimensional code Appropriate layout conversion information for C can be extracted and referenced. As a result, it is possible to preset the limit of terminals that can evaluate the two-dimensional code C, and improve the confidentiality.

In addition to the above, for example, the derivation unit 22 may acquire the layout conversion information or the history information via the communication network 4. In this case, since the two-dimensional code evaluation device 2 does not need to store the layout conversion information in advance, it is possible to suppress an increase in the storage capacity of the two-dimensional code evaluation device 2.

In addition to the above, for example, the derivation unit 22 may acquire the specific information via the communication network 4. In this case, for example, by storing the above-described specific information table in the storage unit 204 in advance, it is possible to extract and refer to appropriate layout conversion information for the two-dimensional code C. As a result, it is possible to preset the limit of terminals that can evaluate the two-dimensional code C, and improve the confidentiality. Further, when the specific information includes the information about the replacement of the arrangement information, the two-dimensional code evaluation apparatus 2 does not need to store the arrangement conversion information in advance, and thus the increase in the storage capacity of the two-dimensional code evaluation apparatus 2 is suppressed. can do.

<<<storage unit 23>>
The storage unit 23 retrieves various types of data such as information regarding the target standard, initial placement information, placement conversion information, and the like stored in the storage unit 204 as necessary. The storage unit 23 stores the various data acquired or generated by the components 21, 22, and 24 in the storage unit 204 as necessary.

<<Output unit 24>>
The output unit 24 outputs the derived target information. The output unit 24 may output other information based on the target information, for example, and the content of the other information can be arbitrarily set in advance. The output unit 24 may output the target information or information notifying that the target information is derived to other terminals such as the two-dimensional code generation device 1 via the communication network 4, for example.

The two-dimensional code evaluation device 2 may include, for example, at least one of the functions 11 to 15 included in the two-dimensional code generation device 1, and the two-dimensional code generation device 1 includes the two-dimensional code evaluation device 2. At least one of the functions 21 and 22 may be provided.

<Server 3>
The server 3 is connected to the two-dimensional code generation device 1, the two-dimensional code evaluation device 2 and the like via the communication network 4, for example. The server 3 stores various past data and the like, and various data is transmitted from the two-dimensional code generation device 1 and the like as necessary. The server 3 may have at least a part of the functions of the two-dimensional code generation device 1 or the like, for example, and may perform at least a part of the processing instead of the two-dimensional code generation device 1 or the like. .. The server 3 stores at least a part of various data stored in the storage units 104 and 204 of the two-dimensional code generation device 1 or the like, and may be used instead of the storage units 104 and 204, for example. In this case, only the minimum information can be stored in the two-dimensional code generation device 1, and security can be improved.

<Communication network 4>
The communication network 4 is, for example, an internet network or the like to which the two-dimensional code generation device 1, the two-dimensional code evaluation device 2, etc. are connected via a communication circuit. The communication network 4 may be configured by a so-called optical fiber communication network. Further, the communication network 4 may be realized by a known communication network such as a wireless communication network in addition to the wired communication network.

(First embodiment: operation of the two-dimensional code system 100)
Next, an example of the operation of the two-dimensional code system 100 according to this embodiment will be described with reference to FIG. FIG. 8A is a flowchart showing an example of the operation of generating the two-dimensional code C among the operations of the two-dimensional code system 100 in the present embodiment, and FIG. 8B is the two-dimensional operation in the present embodiment. 4 is a flowchart showing an example of an operation of evaluating the two-dimensional code C among the operations of the code system 100.

The two-dimensional code system 100 includes an acquisition unit S110, a generation unit S120, a setting unit S130, a replacement unit S140, and a two-dimensional code generation unit S150, and includes, for example, a reading unit S210 and a derivation unit S220. Good.

<Acquisition means S110>
In the acquisition means S110, for example, the acquisition unit 11 acquires target information to be encoded. The acquisition unit 11 may acquire, for example, a plurality of pieces of information as target information. The acquisition unit 11 may acquire specific information associated with the target information, for example.

<Generation means S120>
In the generation unit S120, for example, the generation unit 12 generates one or more data blocks based on the target information. The generation unit 12 generates a plurality of data blocks based on the target information by, for example, a method conforming to the target standard.

<Setting means S130>
In the setting means S130, for example, the setting unit 13 sets the arrangement information for arranging as the initial two-dimensional code for each of the plurality of code data included in the constituent code word based on the initial arrangement information. The setting unit S130 may be performed at the same time as the generating unit S120, for example.

<Replacement means S140>
In the replacement unit S140, for example, the replacement unit 14 replaces the arrangement information set in the plurality of code data. The total number of pieces of arrangement information before and after the exchange unit S140 is equal, and the total number of each value (for example, 0 or 1) indicated by each code data is also equal. Therefore, by replacing the arrangement information, the conventional technique can be used for the process of acquiring the outer shape data, and the data capacity based on the target information included in the two-dimensional code C is set to the conventional initial value. It can be made equal to the data capacity based on the target information that can be set in the dimension code.

The replacement unit 14 may replace the arrangement information set in the coded data, for example, within a range in which the number of error corrections in one or more data blocks among the plurality of data blocks is exceeded. As the number of error corrections, those strictly defined in the target standard are used.

The replacement unit 14 may replace the layout information set in the plurality of code data by referring to the layout conversion information based on at least one of the format information and the model number information, for example. In this case, the replacement unit 14 acquires, for example, at least one of the format information table, the model number information table, and the table obtained by combining the tables, which is stored in the storage unit 104, via the storage unit 16, and each information is acquired. Set and refer to the layout conversion information suitable for.

The replacement unit 14 may replace the layout information set in the plurality of code data with reference to the layout conversion information based on the specific information, for example. In this case, the replacement unit 14 acquires the specific information table stored in the storage unit 104 via, for example, the storage unit 16, sets the layout conversion information suitable for each information, and refers to the layout conversion information.

The replacement unit 14 may replace the layout information set in the plurality of code data with reference to, for example, preset layout conversion information. In this case, the replacement unit 14 acquires the layout conversion information stored in the storage unit 104, for example, via the storage unit 16, and refers to the layout conversion information.

The replacement unit 14 may replace the placement information at random, for example. In this case, the replacement unit 14 stores the history information in the storage unit 104 via the storage unit 16, for example.

The replacement unit 14 may specify the arrangement information to be replaced, based on the error correction code included in the data block, for example. The replacement unit 14 specifies the number of pieces of arrangement information to be replaced, for example, according to the number of pieces of code data included in the error correction code. The replacement unit 14 may identify the layout information to be replaced based on the error correction code after referring to the layout conversion information, for example. As a result, even when the number of pieces of code data included in each error correction code word is different, it is possible to replace the placement information suitable for the conditions such as the placement conversion information.

<Two-dimensional code generation means S150>
In the two-dimensional code generation means S150, for example, the two-dimensional code generation unit 15 generates the two-dimensional code C based on the arrangement information exchanged by the exchange means S140. The two-dimensional code generator 15 generates the two-dimensional code C by, for example, a method conforming to the target standard. The two-dimensional code generation means S150 generates the two-dimensional code C based on at least one of a model number and a format conforming to the same target standard as when the data block is generated by the generation means S120.

<<Mask processing means S151>>
The two-dimensional code generation means S150 may have a mask processing means S151 as shown in FIG. 9, for example. The mask processing means S151 inverts at least a part of the plurality of code data (changes the value from 0 to 1 or from 1 to 0) based on, for example, preset mask information. Thereby, when the two-dimensional code C is generated, the distribution of the bright and dark modules by the code data can be made uniform. In addition, this makes it possible to perform processing different from the standard mask processing defined in the target standard, and it becomes possible to further enhance confidentiality. As the mask information, for example, information about the standard mask pattern in the target standard is used.

Then, for example, the output unit 17 outputs the data for printing the two-dimensional code C to the output mechanism 109. Thus, the output mechanism 109 can be used to print the two-dimensional code C on a paper medium or the like. Note that, for example, the output unit 17 may output the layout conversion information or history information referred to in the replacement unit S140 to the two-dimensional code evaluation device 2 or the like via the communication network 4.

<Reading means S210>
In the reading means S210, for example, the reading unit 21 reads the two-dimensional code C. The reading unit 21 captures an image of the two-dimensional code C printed on a paper medium or the like via the input mechanism 208 and reads the two-dimensional code C.

<Derivation means S220>
In the derivation means S220, for example, the derivation unit 22 derives target information for the two-dimensional code C. The deriving unit 22 derives the target information for the two-dimensional code C with reference to, for example, the layout conversion information or the history information.

The deriving unit 22 may identify the arrangement conversion information referred to when the two-dimensional code C is generated, for example, by referring to the format information table described above. The derivation unit 22 may acquire, for example, the specific information transmitted from the two-dimensional code generation device 1, the arrangement conversion information, or the like.

Then, for example, the output unit 24 outputs the derived target information to the output mechanism 209 or the like.

As a result, the operation of the two-dimensional code system 100 according to this embodiment ends.

In addition, in the two-dimensional code system 100, for example, the above-described setting unit S130 may not be performed. In this case, the exchanging means S140 may refer to arrangement conversion information having a setting order of arrangement information different from the target standard and set the arrangement information in a plurality of code data.

The acquisition unit S110, the generation unit S120, the setting unit S130, the replacement unit S140, the two-dimensional code generation unit S150, and the mask processing unit S151 described above are the acquisition step S11 and the generation step of the two-dimensional code generation method according to this embodiment. Corresponding to S12, setting step S13, replacement step S14, two-dimensional code generation step S15, and mask processing step, the reading means S210 and the deriving means S220 are the reading step S21 of the two-dimensional code evaluation method in this embodiment, and This corresponds to the derivation step S22.

According to the two-dimensional code system 100 in the present embodiment, the two-dimensional code generation means S150 generates the two-dimensional code C based on the arrangement information exchanged by the exchange means S140. Therefore, it is possible to perform the non-readable processing accompanying the replacement of the arrangement information while maintaining the data capacity based on the target information that can be set in the conventional two-dimensional code format. As a result, it is possible to suppress the capacity limit of the information to be concealed.

Further, according to the two-dimensional code system 100 in the present embodiment, the derivation means S220 derives the target information for the two-dimensional code C. Therefore, the derivation of the two-dimensional code C can be realized.

According to the two-dimensional code generation device 1 in this embodiment, the two-dimensional code generation unit 15 generates the two-dimensional code C based on the arrangement information exchanged by the exchange unit 14. Therefore, it is possible to perform the non-readable processing accompanying the replacement of the arrangement information while maintaining the data capacity based on the target information that can be set in the conventional two-dimensional code format. As a result, it is possible to suppress the capacity limit of the information to be concealed.

Further, according to the two-dimensional code evaluation device 2 in this embodiment, the derivation unit 22 derives target information for the two-dimensional code C. Therefore, the derivation of the two-dimensional code C can be realized.

According to the two-dimensional code generation method of the present embodiment, the two-dimensional code generation step S15 generates the two-dimensional code C based on the arrangement information exchanged in the exchange step S14. Therefore, it is possible to perform the non-readable processing accompanying the replacement of the arrangement information while maintaining the data capacity based on the target information that can be set in the conventional two-dimensional code format. As a result, it is possible to suppress the capacity limit of the information to be concealed.

Further, according to the two-dimensional code generation method of the present exemplary embodiment, the replacement step S14 includes the arrangement information set in the code data in a range exceeding the number of error corrections in one or more data blocks among the plurality of data blocks. Replace. Therefore, it is possible to make it more difficult to derive the generated two-dimensional code C by using the conventional two-dimensional code reading device. This makes it possible to increase the confidentiality of the target information.

Further, according to the two-dimensional code generation method of the present embodiment, the replacing step S14 replaces the arrangement information set in the plurality of code data by referring to the arrangement conversion information having the information about the arrangement information replacement. Therefore, it is possible to restrict the derivation of the two-dimensional code C only to a specific terminal (for example, the two-dimensional code evaluation device 2) having the arrangement conversion information. This makes it possible to further increase the confidentiality of the target information.

Further, according to the two-dimensional code generation method in the present embodiment, the replacement step S14 refers to the layout conversion information based on at least one of the format information and the model number information, and sets the layout information set in the plurality of code data. Replace. Therefore, the derivation of the two-dimensional code C can be restricted by using the format information or model number information used in the conventional two-dimensional code generation. This makes it possible to further increase the confidentiality of the target information.

Further, according to the two-dimensional code generation method in the present embodiment, the replacement step S14 replaces the layout information set in the plurality of code data with reference to the layout conversion information based on the specific information. Therefore, the content of the specific information associated with the target information can be changed depending on the content of the target information to be concealed, and the derivation of the two-dimensional code C can be restricted according to the importance of the concealment or the like. This makes it possible to easily change the degree of confidentiality of the target information.

Further, according to the two-dimensional code evaluation method in the present embodiment, the deriving step S22 refers to the arrangement conversion information and derives the target information for the two-dimensional code C. Therefore, it becomes possible to realize the derivation of the two-dimensional code C using the arrangement conversion information.

According to the two-dimensional code C in the present embodiment, it is possible to realize the two-dimensional code C that can suppress the capacity limit of the information to be concealed.

(Second embodiment)
Next, an example of the two-dimensional code C, the two-dimensional code system 100, the two-dimensional code generation device 1, the two-dimensional code evaluation device 2, the two-dimensional code generation method, and the two-dimensional code evaluation method in the second embodiment will be described. ..

The difference between the second embodiment and the first embodiment is that an initial two-dimensional code generation means S160 (initial two-dimensional code generation step S16) is further provided. Note that description of the same configuration and contents as those of the first embodiment will be omitted.

In the present embodiment, for example, as shown in FIG. 10, after setting arrangement information for each of a plurality of code data (FIG. 10A), an initial two-dimensional code is generated (FIG. 10B). .. Then, the arrangement information for each code data is exchanged to generate the two-dimensional code C (FIG. 10(c)). At this time, for example, as shown by the arrow in FIG. 10C, the arrangement information set in the two-dimensional code C is not replaced, but the code data set in the arrangement information is replaced.

Also in this case, similarly to the above-described embodiment, it is possible to prevent the derivation (decoding) of data by using a general-purpose reading device or the like based on the target standard. Therefore, the two-dimensional code C in the present embodiment can be shown in a state in which the non-readable processing is applied to the entire coding area. In particular, the two-dimensional code generation method according to the present embodiment can generate a highly confidential two-dimensional code C even when the initial two-dimensional code has already been generated by another terminal or the like.

The arrangement conversion information used in this embodiment has information for changing the code data arranged at a specific position in the initial two-dimensional code to another position, for example. For example, in the arrangement conversion information illustrated in FIG. 11A, the code data set in the arrangement information “a” is replaced with the arrangement information “B”, and the code data set in the arrangement information “B” is arranged information “f”. Indicates the information to be replaced with. As a result, the position where each code data is arranged is changed as shown by the arrow in FIG.

Further, the arrangement conversion information used in this embodiment has information for replacing the code data arranged in each row or each column in the initial two-dimensional code with another row or column. For example, in the arrangement conversion information shown in FIG. 11B, the code data set in the arrangement information of the “x column” is replaced with the arrangement information of the “x+1” column, and the code data set in the arrangement information of the “N column” is used. Shows the information to replace the "1" with "1". As a result, the position where each code data is arranged is changed as indicated by the arrow in FIG.

Further, the arrangement conversion information used in the present embodiment has information for turning the position where the code data is arranged in the initial two-dimensional code along the row or the column. For example, in FIG. 12, an example in which the arrangement conversion information is referred to and the arrangement information set in the code data is replaced by the initial rotation (R1 to R10) 10 times from the initial two-dimensional code to be converted into the array of the two-dimensional code C Show. In FIG. 12, the target row or column in each turn (R1 to R10) is indicated by a broken line frame, the degree of turn is indicated by an arrow, and the letters a to y indicate arrangement information. Further, in FIG. 12, in order to clarify the movement of the code data before and after the turning, numbers (1) to (25) are given to each code data.

The layout conversion information illustrated in FIG. 12 includes rows or columns to be turned (eg, “row 1, 3, 5” or “column 1, 3, 5”, etc.) and a degree of turning (eg, “shift 3”, etc.). ) Is shown. That is, a rule for replacing the arrangement information is used as the arrangement conversion information. Therefore, when replacing the arrangement information, one arrangement conversion information can be used regardless of the format of the initial two-dimensional code. Further, the information used as the layout conversion information (replacement rule) can significantly reduce the data capacity as compared with the table for setting the layout conversion information. As a result, the load on the storage capacity of the two-dimensional code generation device 1 or the like can be reduced. In FIG. 12, the number of turns is shown as 10, but the number of turns is arbitrary.

(Second embodiment: operation of the two-dimensional code system 100)
Next, an example of the operation of the two-dimensional code system 100 according to this embodiment will be described with reference to FIG. FIG. 13 is a flowchart showing an example of the operation of generating the two-dimensional code C among the operations of the two-dimensional code system 100 according to this embodiment. Note that, among the operations of the two-dimensional code system 100 according to this embodiment, the operation of evaluating the two-dimensional code C is the same as that of the above-described embodiment, and thus the description thereof is omitted.

<Initial two-dimensional code generation means S160>
The two-dimensional code system 100 according to this embodiment further includes an initial two-dimensional code generation means S160. In the initial two-dimensional code generation unit S160, after the setting unit S130, for example, the two-dimensional code generation unit 15 generates the initial two-dimensional code based on the arrangement information set for each of the plurality of code data. The two-dimensional code generation unit 15 generates an initial two-dimensional code, for example, by a method according to the target standard.

After that, as in the above-described embodiment, the replacement unit S140 and the like are performed, and the operation of the two-dimensional code system 100 in this embodiment ends.

The two-dimensional code generation means S150 generates the two-dimensional code C based on at least one of the model number and the format similar to the initial two-dimensional code, for example. Further, the two-dimensional code generation means S150 may include the mask processing means S151 described above. In this case, similarly to the above-described embodiment, when the two-dimensional code C is generated, the distribution of the light and dark modules by the code data can be made uniform. Further, it is possible to perform processing different from the standard mask processing defined in the target standard, and it is possible to further improve the confidentiality.

Note that, for example, the two-dimensional code generation device 1 may acquire the initial two-dimensional code generated by another terminal 9 and perform the processing of the replacement unit S140 and thereafter. In this case, the two-dimensional code generation device 1 can read the initial two-dimensional code by including the above-mentioned reading unit 21, for example, after deriving a data block from the initial two-dimensional code using a known technique, You may perform processing, such as the exchange means S140.

The initial two-dimensional code generation means S160 described above corresponds to the initial two-dimensional code generation step S16 of the two-dimensional code generation method in this embodiment. In the initial two-dimensional code generation means S160, for example, the same mask processing as the mask processing means S151 described above may be performed.

According to the two-dimensional code generation method of the present embodiment, the initial two-dimensional code generation step S16 includes, after the setting step S13, the initial two-dimensional code generation step S16 corresponding to the initial arrangement information based on the arrangement information set for each of the plurality of code data. Generate a two-dimensional code. Therefore, for example, even when the initial two-dimensional code has already been generated by another terminal 9 or the like, it is possible to generate a highly confidential two-dimensional code. As a result, it becomes possible to expand the conditions for data that can generate a two-dimensional code.

Further, according to the two-dimensional code generation method of the present embodiment, the arrangement conversion information has information for turning the position where the code data is arranged in the initial two-dimensional code along the row or the column. Therefore, when replacing the arrangement information, one arrangement conversion information can be used regardless of the format of the initial two-dimensional code. As a result, it becomes easy to generate the two-dimensional code C with enhanced confidentiality for various initial two-dimensional code formats. Further, it is not necessary to set the placement information for each format of the initial two-dimensional code, and it is possible to enhance the confidentiality with the minimum information.

In addition, also in the two-dimensional code system 100 and the two-dimensional code generation device 1 according to the present embodiment, the same effect as that of the above-described embodiment can be obtained.

Although the embodiments of the present invention have been described, the embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are also included in the invention described in the claims and an equivalent range thereof.

1: two-dimensional code generation device 2: two-dimensional code evaluation device 3: server 4: communication network 9: terminal 10: housing 11: acquisition unit 12: generation unit 13: setting unit 14: replacement unit 15: two-dimensional code generation Unit 16: storage unit 17: output unit 20: housing 21: reading unit 22: derivation unit 23: storage unit 24: output unit 100: two-dimensional code system 101: CPU
102: ROM
103: RAM
104: Storage unit 105: I/F
106: I/F
107: I/F
108: Input mechanism 109: Output mechanism 110: Internal bus 201: CPU
202: ROM
203: RAM
204: Storage unit 205: I/F
206: I/F
207: I/F
208: Input mechanism 209: Output mechanism 210: Internal bus S110: Acquisition means S120: Generation means S130: Setting means S140: Replacement means S150: Two-dimensional code generation means S151: Mask processing means S160: Initial two-dimensional code generation means S210: Reading means S220: Derivation means C: Two-dimensional code AP: Alignment pattern DP: Data code word arrangement area EP: Error correction code word arrangement area FI: Format information arrangement area FP: Position detection pattern SP: Separation pattern TP: Timing pattern M: Module QZ: Quiet zone

Claims (20)

An acquisition step of acquiring the target information to be coded,
A generation step of generating a data block including a constituent code word based on the content of the target information;
Based on preset initial placement information, for each of the plurality of code data included in the constituent code word, a setting step of setting placement information for placement as an initial two-dimensional code,
An exchanging step of exchanging the arrangement information set in a plurality of the code data,
A two-dimensional code generating step of generating a two-dimensional code based on the arrangement information replaced by the replacing step;
A two-dimensional code generation method comprising: The replacement step replaces the arrangement information set in the code data within a range exceeding the number of error corrections in one or more of the data blocks among the plurality of data blocks. Two-dimensional code generation method. The two-dimensional code generation method according to claim 2, wherein the replacing step replaces the arrangement information set in a plurality of the code data with reference to arrangement conversion information having information regarding replacement of the arrangement information. .. The replacing step replaces the layout information set in a plurality of the code data by referring to layout conversion information based on at least one of format information and model number information used when the initial two-dimensional code is generated. The two-dimensional code generation method according to claim 2. The acquisition step acquires specific information associated with the target information,
The two-dimensional code generation method according to claim 2, wherein the replacing step replaces the arrangement information set in a plurality of the code data with reference to the arrangement conversion information based on the specific information. The two-dimensional code generation according to any one of claims 3 to 5, wherein the arrangement conversion information has information regarding a recognition order of the arrangement information when the code data is derived from the two-dimensional code. Method. The arrangement conversion information includes information for replacing the arrangement information set in a plurality of the code data included in one constituent code word, The arrangement conversion information according to any one of claims 3 to 5, wherein Dimension code generation method. In the arrangement conversion information, the first arrangement information set in the code data included in the first constituent code word among the plurality of constituent code words is set in the code data included in the second constituent code word. The two-dimensional code generation method according to any one of claims 3 to 5, further comprising information to be replaced with the second placement information. After the setting step, an initial two-dimensional code generation step of generating the initial two-dimensional code based on the arrangement information set for each of the plurality of code data is further included. The two-dimensional code generation method according to any one of 1. 10. The two-dimensional code generation method according to claim 9, wherein the arrangement conversion information has information for changing the code data arranged at a specific position in the initial two-dimensional code to another position. 10. The two-dimensional arrangement according to claim 9, wherein the arrangement conversion information has information for changing the code data arranged in each row or column in the initial two-dimensional code to another row or column. Code generation method. 10. The two-dimensional code generation method according to claim 9, wherein the arrangement conversion information has information for reversing a position where the code data is arranged in the initial two-dimensional code along a row or a column. 13. The two-dimensional code generation step includes a mask processing step of inverting at least a part of the plurality of code data based on preset mask information. The described two-dimensional code generation method. The two-dimensional code generation method according to any one of claims 3 to 13, wherein the replacing step specifies the arrangement information to be replaced based on an error correction codeword included in the data block. The two-dimensional code generation method according to any one of claims 3 to 14, wherein the two-dimensional code format is a QR code format. A two-dimensional code evaluation method for evaluating the two-dimensional code generated by the two-dimensional code generation method according to claim 3.
A reading step of reading the two-dimensional code,
A deriving step of deriving the target information for the two-dimensional code with reference to the arrangement conversion information. Acquisition means for acquiring the target information to be encoded,
Generating means for generating a data block including a constituent code word based on the content of the target information;
Based on preset initial placement information, setting means for setting placement information for placing as an initial two-dimensional code for each of a plurality of code data included in the constituent code word,
A replacing means for replacing the arrangement information set in a plurality of the code data,
A two-dimensional code generation means for generating a two-dimensional code based on the arrangement information exchanged by the exchange means,
A two-dimensional code system comprising: Reading means for reading the two-dimensional code,
The derivation|leading-out means which derives|leads-out the said object information with respect to the said two-dimensional code is provided further, The two-dimensional code system of Claim 17 characterized by these. An acquisition unit that acquires target information that is the target of encoding,
A generation unit that generates a data block including a constituent code word based on the content of the target information;
Based on preset initial placement information, for each of the plurality of code data included in the constituent code word, a setting unit for setting placement information for placement as an initial two-dimensional code,
A replacement unit that replaces the arrangement information set in the plurality of code data,
A two-dimensional code generation unit that generates a two-dimensional code based on the arrangement information exchanged by the exchange unit,
A two-dimensional code generation device comprising: A two-dimensional code evaluation device for evaluating the two-dimensional code generated by the two-dimensional code generation device according to claim 19 .
A reading unit for reading the two-dimensional code,
And a deriving unit that derives the target information for the two-dimensional code.