JPH05336106A - Ciphering communication system in data communication - Google Patents

Abstract

PURPOSE:To send a message only to a specific opposite party in data communication. CONSTITUTION:A prescribed message is made corresponding to prescribed character information and character information corresponding to a message desired to be sent from a sender side is sent, the message corresponding to the received character information is displayed at the receiver side or an optional message from the sender side is converted into a binary number and an external character pattern is formed by a binary number, an external character code and an external pattern are sent and the receiver side processes the external pattern as the character code and displays the message.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a code communication system for transmitting information only to a specific partner in one-way data communication such as data multiplex broadcasting, FM multiplex broadcasting, satellite broadcasting and facsimile broadcasting. It is a thing.

[0002]

2. Description of the Related Art Today, in the information age, not only voice or video communication but also data communication has become popular. This data communication is in addition to the closed type data communication system used only internally, which has been used in banks etc.
Recently, open-type data communication systems that can be used from the outside have become widespread.

This open type data communication system is classified into a bidirectional type and a unidirectional type. In the bidirectional type, a so-called VAN for performing normal communication as the content of data communication.
A system called (Varue Added System Value Added Communication Network), SIS (Storategy Information System Strategic Information) that applies for various transactions such as banking and securities transactions as well as boarding ticket, admission ticket, horse racing voting ticket etc. as the content of data communication There is a system called a system) and a system called a captain that is performed by a dedicated device. On the other hand, unidirectional broadcasting includes character multiplex broadcasting, FM multiplex broadcasting, satellite broadcasting, facsimile broadcasting, etc. Recently, character multiplex broadcasting has been attracting attention as a new media.・ Information such as exchange information, traffic information, event information, various market conditions, various reservation conditions, etc. is constantly being exchanged. The information provided by these open data communication systems can be received by anyone who has a receiving facility.

Then, the VAN or SIS and the character multiplex broadcasting are combined, general information is sent by the character multiplex broadcasting, and the VAN or SIS is based on the information.
Transactions or applications are made via the Internet, and by doing so, communication costs can be reduced.

In the open-type data communication system used for such an application, among the information to be transmitted, for example, only the inside of the information provider side is notified of the occurrence of a failure or the occurrence of a disaster and disaster prediction information. There is a case where you want to send only to a specific party such as contacting only the person concerned, but it is impossible to put other information to be sent only to the specific party in the public information.

[0006] Further, in VAN or SIS, the published information for making a transaction or application is also flowed, but there is a case where the information may be sent only to a specific partner as in the above case, but it is disclosed. It is impossible to include other information in the information that is sent only to a specific opponent.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and an object thereof is to make it possible to send arbitrary information only to a specific partner in data communication. ..

[0008]

In order to solve the above problems, in the present application, when a specific character or character string is transmitted in data communication, a message corresponding to the signal registered in advance on the receiving side is provided. An invention in which information is sent only to a specific party by displaying it, that is, "a cryptographic communication method that handles cryptography in data communication, in which certain text information is associated with a certain message, and the sender wants to transmit. The invention and the external character pattern in data communication, characterized in that the character communication corresponding to the message is transmitted, and the receiving side displays the message corresponding to the received character information. The invention of a cryptographic communication system that sends information only to a specific other party by using A cryptographic communication method for handling encryption in Data Communications, character information in the transmitting side 16
It is converted into a binary code, the hexadecimal code is converted into a binary code, the binary code is transmitted as external character pattern data, and the binary code received as external character pattern data is converted into 16 by the receiving side.
An encrypted communication system in data communication, which is characterized by converting into a hexadecimal code and displaying character information corresponding to a hexadecimal code.

[0009]

[Operation] In the first invention of the present application, in the case of a general receiving device, a character string is displayed or nothing is displayed for encrypted information, but it is confirmed that the character string is encrypted information. Information is displayed in the case of a receiving device that can detect it, and in the second invention of the present application, only the external character pattern whose meaning is unknown is displayed in the case of a general receiving device, but the external character pattern is the information. In the case of a receiving device that can detect this, the information is displayed.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below. First, characters used in character multiplex broadcasting to which the present invention is applied will be described.

Characters used in the character multiplex broadcasting are
JIS Level 1 Kanji 2,965, same non-Kanji 524,
173 additional symbols for teletext, JIS Level 2 Kanji 3,
388 characters (2 bytes or more), 94 alphanumeric characters, 94 katakana / symbols, 91 hiragana symbols, mosaic set 2
There are 80 characters (1 byte system or more). In addition to this, 1,410 characters are used for 1-byte characters and 8,83 characters are used for 2-byte characters.
Six letters can be used.

These character patterns are called by a character code defined by JIS in four-digit hexadecimal numbers. This character code is 4 digits 16 defined by JIS.
It is displayed as a base number, that is, a 16-digit binary number. For example, "special" is "4643", "permission" is "3576", and "wish"
Are each displayed as "346A".

An embodiment in which the first invention of the present application is applied to character multiplex broadcasting will be described with reference to FIG. This figure shows an example in which the symbol (*) is used as a character string for encryption, and is a table of the receiving device capable of detecting that the symbol transmitted in (a) is encrypted information. An example
(B) shows a display example of a general receiving device.

When a character string based on a certain agreement is transmitted in this way, the receiving device that can determine that the character string is a message does not process the character string as a character string, and instead displays (a). As shown, a message with the character string as a key among the messages stored in the receiving device in advance is displayed, for example, the message "Natural disaster has occurred, all operations are suspended." ..

When a character string based on a certain agreement is transmitted in this way, the receiving device that can determine that the character string is a message does not process the character string as a character string, and instead displays (a). As shown, a message with the character string as a key among the messages stored in the receiving device in advance is displayed, for example, the message "Natural disaster has occurred, all operations are suspended." ..

On the other hand, an apparatus that cannot determine that the character string is a message processes the character string as a simple character string, and therefore the screen shows the meaning as shown in (b). Unknown string is displayed.

The character string used for encryption may use various symbols or the like used in ordinary text alone, but in such a case, in a general teletext receiving side device which cannot process the encryption. The displayed string can cause unnecessary confusion.

In such a case, confusion is less likely to occur if mosaic mosaic characters for graphics that are infrequently used and are inconspicuous are used.

Further, in that case, if a graphic screen using mosaic characters is prepared for the screen displayed for general use and the cipher is transmitted using a part of the graphic screen, the occurrence of confusion is further reduced. It

As described above, in the character multiplex broadcasting, the mosaic set 280 is used in addition to the characters specified by JIS.
Characters, 1-byte system external characters 1,410 characters, 2-byte system external characters 8,8
Although 36 characters can be used, these characters cannot be used in data communication by a computer or the like. Therefore, in data communication by a computer or the like, a 1-byte type symbol or a 2-byte type symbol is used instead of the mosaic set of 280 characters in the character multiplex broadcasting.

Next, an embodiment in which the second invention of the present application is applied to character multiplex broadcasting will be described. Before that, character patterns used in character multiplex broadcasting will be described.
FIG. 4A shows a standard character pattern normally used in the character multiplex broadcasting, which is 16 horizontal × 24 vertical.
A predetermined character pattern is formed by white and black dots arranged in the matrix.

In addition to this standard character pattern, the character patterns used in the character multiplex broadcasting include a horizontal 8 × vertical 24 medium character pattern shown in (b) and a horizontal 8 × shown in (c). 12 small vertical character patterns, 32 x 24 horizontal double character patterns shown in (d), 16 x 48 vertical double character patterns shown in (e), shown in (f) 32 × 48 vertical double-horizontal character pattern, horizontal 16 × vertical 20 special size single character pattern shown in (g),
There are horizontal 20 × vertical 20 special size 2 character patterns shown in (h) and horizontal 4 × vertical 4 ultra-small character patterns shown in (i).

Note that the character pattern used in a computer or the like includes horizontal 16 × vertical 1 shown in (j).
There are full-width character patterns for displaying Kanji arranged in a matrix of 6 and half-width character patterns for displaying English, number and katakana arranged in a matrix of 8 horizontal × 16 vertical shown in (k).

These dots forming the character pattern correspond to white = 0 and black = 1, respectively, and are normally sent out from the font ROM which stores the pattern as data. This font ROM stores a large number of character patterns of 7,224 characters, but in actual use, external characters are used as special symbols and the like that are not stored in the font ROM.

The data amount of this character pattern is 16 bits × 2 in the case of a standard character pattern in character multiplex broadcasting.
4 lines = 2 Bytes × 24 lines = 48 Bytes, 16 bits × 16 in the case of a full-width character pattern by a computer or the like
Line = 2 Byte × 16 line = 32 Byte, in case of half-width character pattern, 8 bit × 16 line = 1 Byte × 16 line =
16 bytes.

In the second invention of the present application, the data amount of this character pattern is 48 Bytes for standard characters,
32 bytes for full-width characters, 16 for half-width characters
Bytes and the fact that the character code is represented by a 16-digit binary number, that is, 2 Bytes, is used.
When the character code of JIS 1, Kanji 2,965 and non-Chinese 524 are expressed in binary, a character pattern is constructed by setting 0 = white and 1 = black, and this character pattern is used as an external character pattern. Define and add an external character code.

In addition, half-width characters, which are English, numeric and katakana characters, are divided into roman characters and katakana in JIS and are displayed in 7-bit binary numbers, respectively, and are further integrated into 8 bits, that is, 2-digit hexadecimal numbers. Is displayed. The control codes and alphanumeric characters in JIS are the American standard ASCII standard and the international standard IS.
It is common with that used in the O standard.

An embodiment in which the first invention of the present application is applied to character multiplex broadcasting will be described with reference to FIGS. 2 and 3. The example shown here is an example of displaying information such as "A natural disaster has occurred, and all operations are suspended."

When this information is represented by a hexadecimal JIS code, as shown in (a), "self" is "3C2B",
"Well" is "4133", "Disaster" is "3A52", "Damage"
"3332", "ga" is "242C", "departure" is "4"
82F "," raw "is" 4038 ", and" shi "is" 243 "
7 "," ta "is" 243F "," ta "is" 243F ",
"Me" is "2461", "," is "2122", "all"
"4134", "te" is "2446", "no" is "2"
"44E", "Business" is "3648", "Business" is "4C3"
3 "," ga "is" 242C "," stop "is" 4464 ",
"Stop" is "3B5F", "Medium" is "4366", "De"
"2447", "su" is "2439", "." Is "2"
123 ".

When these are converted into binary numbers, the result is as shown in (b). Furthermore, 0 of these binary numbers is a white dot,
When 1 is represented by a black dot, the information of "all operations are suspended because a natural disaster has occurred" finally constitutes the external character pattern data shown in (c).

When the information constituted as the external character pattern data is transmitted with a character code based on a certain agreement, it is determined that the external character pattern data with the external character code is encrypted information. The device that can do this does not process the external character pattern data as external character data, but treats it as a character code.
The screen displays the information "All work is suspended because a natural disaster has occurred."

On the other hand, an apparatus which cannot determine that the external character pattern data with the external character code is encrypted information processes the external character pattern data as an external character, and therefore the screen is not displayed. The pattern shown in (c) is displayed as an external character. It is also possible to transmit various control codes according to the external character pattern data.

FIG. 2 shows an example of a display screen in the character multiplex broadcasting to which the second invention of the present application is applied.
(A) shows the display screen of the device which can discriminate that the external character pattern data with the external character code is encrypted information, and (b) shows the external character pattern data is encrypted. It is a display screen of the device which cannot be discriminated as the information which is stored.

In general data communication such as character multiplex broadcasting, the external character pattern is separated from the information to be communicated and is transmitted in advance together with control data and the like. Therefore, it is possible not to display the external character pattern at all, and in this way, no display is made on the screen, so that even in a device that cannot determine that the external character code is a message, It does not disturb the eyes.

Further, the message that can be transmitted and displayed when the external character pattern is used does not need to be registered in advance. Not only can the required message be transmitted each time, but the length of the message can be changed. There is no limit.

If the external character pattern data to be transmitted is scrambled and encrypted to a higher degree, more complete encryption can be achieved.

Although the embodiments described above are applied to the character multiplex broadcasting of the inventions of the present application, the inventions of the present application are other data communication systems such as a data communication system using a computer and a communication system using a display. Can be applied to.

[0038]

As is apparent from the above description, only the device capable of discriminating that the transmitted signal is a message according to the dark communication system in the data communication of the present invention displays the message. The message cannot be displayed on some other devices. Therefore, the confidentiality of the encrypted message can be secured.

Further, in the second aspect of the invention, since the external character pattern itself is the message, it is not necessary to prepare the message in advance and there is no limitation on its length.
In addition, since it is possible to transmit an encrypted message of 24 characters in the case of character multiplex broadcasting and 16 characters in the case of data communication using a computer using the space for one character of the external character pattern, the external character code is The external character pattern displayed on the device that cannot identify the message is not only one character, but it can be set not to be displayed, so that it does not hinder other information from being viewed.

Therefore, the invention of the present application is a countermeasure for troubles in online systems, home / firm banking of banks and securities, trading, trouble notification measures for various reservation systems and ordering systems, backup of telephone lines, occurrence and prediction of emergency disaster pollution. Information transmission, alarm control,
It can bring great convenience when used for controlling the display panel and reporting to the home.

[Brief description of drawings]

FIG. 1 is a display screen diagram of an embodiment in which the first invention of the present application is applied to character multiplex broadcasting.

FIG. 2 is a display screen diagram of an embodiment in which the second invention of the present application is applied to character multiplex broadcasting.

FIG. 3 is an explanatory diagram of an external character pattern of an embodiment in which the present invention is applied to character multiplex broadcasting.

FIG. 4 is an explanatory diagram of character patterns used in character multiplex broadcasting and data communication using a computer or the like.

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location H04N 1/44 2109-5C 7/167 8943-5C

Claims (2)

[Claims] 1. A cryptographic communication method for handling cryptography in data communication, in which certain character information is associated with a certain message, and character information corresponding to a message to be transmitted is transmitted from a transmitting side, and a receiving side A cryptographic communication method in data communication characterized by displaying a message corresponding to received character information. 2. A cryptographic communication method for handling cryptography in data communication, wherein character information is converted into a hexadecimal code at the transmission side, the hexadecimal code is converted into a binary code, and the 2
The binary code is sent as external character pattern data, and the receiving side receives 1 as the binary code received as external character pattern data.
A cryptographic communication method in data communication, characterized by converting to a hexadecimal code and displaying character information corresponding to the hexadecimal code.