CN112181327B

CN112181327B - Table lookup processing method, device, consumable chip, system and storage medium

Info

Publication number: CN112181327B
Application number: CN202011056729.2A
Authority: CN
Inventors: 陈亮
Original assignee: Jihai Microelectronics Co ltd
Current assignee: Jihai Microelectronics Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2023-07-25
Anticipated expiration: 2040-09-30
Also published as: CN112181327A

Abstract

The embodiment of the invention provides a table lookup processing method, a table lookup processing device, a consumable chip, a table lookup system and a storage medium, wherein the table lookup processing method comprises the following steps: acquiring instruction information sent by printing imaging equipment, wherein the instruction information comprises data to be processed; searching corresponding response data through a pre-stored lookup table according to the data to be processed; the response data is sent to the printing imaging equipment, and the response data returned to the printing imaging equipment can be determined by storing a lookup table in the consumable chip and by inquiring the table, so that an algorithm and key parameters do not need to be stored in the consumable chip, and the problem that the important algorithm or key parameters are easily cracked is solved.

Description

Table lookup processing method, device, consumable chip, system and storage medium

Technical Field

The present invention relates to the field of printing imaging technologies, and in particular, to a table lookup processing method, a table lookup processing device, a consumable chip system, and a storage medium.

Background

At present, a printing imaging device is an indispensable device in office activities, printing consumables such as a consumable box are required to be used in the printing process, consumable chips are generally arranged on the printing consumables, relevant information about the printing consumables is stored on the consumable chips, identity recognition can be carried out through response data provided by the consumable chips, and use information of the consumables can be obtained, so that the printing consumables can be replaced in time when the consumables are about to be consumed.

In the prior art, when the printing imaging equipment needs to be verified, a consumable chip obtains response data through a stored algorithm according to data sent by the printing imaging equipment and key parameters stored by the consumable chip; when the consumable parameters of the printing imaging equipment are required to be acquired, the consumable chip can obtain response data according to the data and key parameters sent by the printing imaging equipment. Thus, both the process of verifying the consumable chip and the process of determining the consumable parameters require algorithms and/or key parameters to be stored in the consumable chip.

The inventor finds that in the process of implementing the invention, algorithms and/or key parameters in consumable chips in the prior art are easy to crack, so that the security of the algorithms and the key parameters is poor.

Disclosure of Invention

The embodiment of the invention provides a table lookup processing method, a table lookup processing device, a consumable chip, a table lookup system and a storage medium, which are used for solving the problem that an algorithm or key parameters in the consumable chip are easily cracked.

In a first aspect, an embodiment of the present invention provides a table lookup processing method, including:

acquiring instruction information sent by printing imaging equipment, wherein the instruction information comprises data to be processed;

Searching corresponding response data through a pre-stored lookup table according to the data to be processed;

and transmitting the response data to the printing imaging device.

In one possible design, the instruction information further includes an instruction bit, the method further comprising:

determining the type of the instruction information according to the instruction bit in the instruction information;

and determining a corresponding query form according to the type of the instruction information.

In one possible design, the instruction information is an authentication instruction, and the data to be processed included in the authentication instruction is a random number generated by the printing imaging device;

according to the data to be processed, searching corresponding response data through a pre-stored lookup table, wherein the method comprises the following steps:

and searching response data corresponding to the random number in a prestored authentication inquiry form, wherein the response data is used for the printing imaging equipment to identify the consumable chip.

In one possible design, the instruction information is an update instruction for updating consumable parameters in the consumable chip;

And searching corresponding response data through a pre-stored parameter lookup table according to the data to be processed, wherein the response data is used for representing the current value of the consumable parameter.

In one possible design, transmitting the response data to the print imaging device includes:

updating the consumable parameters stored in a preset address into the response data after the corresponding response data are searched;

acquiring a reading instruction sent by the printing imaging equipment, wherein the reading instruction is used for reading the consumable parameters currently stored in the consumable chip;

and reading the consumable parameters stored in the preset address according to the reading instruction, and sending the consumable parameters stored in the preset address to the printing imaging equipment.

In one possible design, according to the data to be processed, searching corresponding response data through a pre-stored parameter lookup table includes:

searching response data corresponding to the data to be processed in a pre-stored parameter lookup table;

correspondingly, the method further comprises the steps of: and updating the parameter lookup table after updating the consumable parameters into the response data.

In one possible design, the parameter lookup table includes a first column and a second column, where each data to be processed is located in the first column and each response data is located in the second column;

correspondingly, updating the parameter lookup table comprises the following steps: subtracting the data to be processed in the instruction information from each data in the first column and storing the data.

judging whether consumable parameters stored in the consumable chip are updated or not;

if yes, inquiring the data to be processed corresponding to the consumable parameters stored currently through the parameter inquiry form according to the consumable parameters stored currently;

adding the queried data to be processed with the data to be processed in the instruction information to obtain updated data to be processed;

and searching response information corresponding to the updated data to be processed in the parameter lookup table.

In one possible design, the method further comprises:

if the consumable parameters stored in the consumable chip are not updated, response data corresponding to the data to be processed in the instruction information are searched in a pre-stored parameter lookup table.

In one possible design, the method further comprises:

determining all possible values of the data to be processed acquired from the printing and imaging device;

for each possible value, determining response data corresponding to the possible value according to an algorithm for calculating the response data and/or key parameters of the consumable chip;

creating a lookup table, wherein the lookup table comprises the corresponding relation between each possible numerical value and response data;

and burning the query form into the consumable chip.

In a second aspect, an embodiment of the present invention provides a table look-up processing apparatus, including:

the acquisition module is used for acquiring instruction information sent by the printing imaging equipment, wherein the instruction information comprises data to be processed;

the searching module is used for searching corresponding response data through a pre-stored query form according to the data to be processed;

and the sending module is used for sending the response data to the printing imaging equipment.

In a third aspect, an embodiment of the present invention provides a consumable chip, including:

at least one processor; and

a memory communicatively coupled to the at least one processor;

wherein the memory stores instructions executable by the at least one processor to cause the consumable chip to perform the method of any one of claims 1-10.

In a fourth aspect, an embodiment of the present invention provides a printing system, including: the consumable chip of the third aspect and a printing and imaging device;

the printing imaging equipment is used for sending instruction information to the consumable chip and receiving response data fed back by the consumable chip according to the instruction information.

In a fifth aspect, an embodiment of the present invention provides a computer readable storage medium, where computer executable instructions are stored, and when executed by a processor, implement a look-up table processing method according to any one of the first aspects.

The embodiment of the invention provides a table lookup processing method, a table lookup processing device, a consumable chip, a table lookup system and a storage medium, wherein the table lookup processing method comprises the following steps: acquiring instruction information sent by printing imaging equipment, wherein the instruction information comprises data to be processed; searching corresponding response data through a pre-stored lookup table according to the data to be processed; the response data is sent to the printing imaging equipment, and the response data returned to the printing imaging equipment can be determined by storing a lookup table in the consumable chip and by inquiring the table, so that an algorithm and key parameters do not need to be stored in the consumable chip, and the problem that the important algorithm and/or key parameters are easily cracked is solved.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are some embodiments of the invention and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic view of an application scenario provided in an embodiment of the present invention;

FIG. 2 is a flow chart of a lookup table processing method according to an embodiment of the present invention;

FIG. 3 is a flow chart of searching corresponding response data according to a parameter lookup table according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of authenticating a consumable chip according to an embodiment of the present invention;

FIG. 5 is a schematic flow chart of updating consumable parameters of a consumable chip according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a consumable chip according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a table look-up processing device according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of another consumable chip according to an embodiment of the present invention.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The scheme provided by the embodiment of the invention can be applied to any suitable industry field or technical field, such as the technical field of printing imaging.

Fig. 1 is a schematic diagram of an application scenario provided in an embodiment of the present invention. As shown in fig. 1, the printing consumable 20 is detachably mounted on a main body of the printing image forming apparatus 10, and a consumable chip 30 is provided on the printing consumable 20. The print imaging apparatus 10 may be a printer, scanner, or the like. When the printing imaging device 10 needs to authenticate the consumable chip 20 or acquire information of the consumable chip 20, an instruction is sent to the consumable chip 30, the consumable chip 30 can determine response information according to the instruction sent by the printing imaging device 10, and the determined response information is fed back to the printing imaging device 10. The printing imaging device 10 can determine whether the printing consumable 20 passes the authentication or not according to the acquired response information, or determine consumable parameters of the current printing consumable 20, determine consumable usage conditions according to the consumable parameters, and perform corresponding processing according to the consumable usage conditions.

In practice, the consumable chip will store algorithms and/or key parameters for calculating response data in order to generate response data from data sent by the print imaging device. The process needs to store algorithms and/or key parameters in the consumable chip, and when the algorithms and/or key parameters are stored in the consumable chip, a competitor can obtain the algorithms and/or key parameters stored in the chip by means of breaking the chip or reverse engineering and the like, so that information disclosure is possibly caused.

In order to solve the problem, the embodiment of the invention stores the query form in the consumable chip, the query form comprises the corresponding relation between the data sent by the printing imaging equipment and the response data, and the information which the printing imaging equipment wants to acquire can be determined through the query form.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the case where there is no conflict between the embodiments, the following embodiments and features in the embodiments may be combined with each other.

Fig. 2 is a flow chart of a table look-up processing method according to an embodiment of the present invention. The execution subject of the method of the embodiment may be a consumable chip. As shown in fig. 2, the table look-up processing method in this embodiment may include:

Step S201, acquiring instruction information sent by a printing imaging device, where the instruction information includes data to be processed.

The instruction information is information indicating that the consumable chip performs a certain operation, for example, the instruction information may be an authentication instruction, and is used for identifying the identity of the consumable chip to determine whether the consumable chip passes the authentication; the instruction information can also be an update instruction for updating consumable parameters in time after the image forming apparatus prints the file.

The instruction information is information actively sent to the consumable chip by the printing imaging equipment. The trigger condition for sending the instruction information is not limited. Specifically, an authentication instruction may be sent when the printing consumable is first installed to the printing imaging device, so as to perform security authentication on the consumable chip; the printing imaging device can also authenticate the consumable chip before printing the file; the consumable chip can be authenticated at preset time intervals. For the update instruction, the update instruction may be sent after each time of printing the file; the update instruction may be sent at intervals of a predetermined time. The preset time is not limited herein, and may be set according to actual situations.

In addition, the instruction information can contain data to be processed, and the data to be processed is used for determining response information fed back by the consumable chip. For example, when verifying a consumable chip, the data to be processed may be one or more random data; when the consumable information is updated, the data to be processed can be consumable parameters used for a period of time.

Optionally, the instruction information further includes an instruction bit, and the method further includes:

determining the type of the instruction information according to the instruction bit in the instruction information; and determining a corresponding query form according to the type of the instruction information.

In this embodiment, the instruction information may be various, so after the instruction information of the printing imaging device is acquired, the type of the instruction information needs to be determined, and then the query form is determined according to the type of the instruction information. Specifically, an instruction bit may be set in the instruction information, the instruction type may be determined by the instruction bit, the data stored in the instruction information is data of a plurality of bytes, and one byte may be selected as the instruction bit.

For example, the bytes of stored data are 4 bytes, and the 4 th byte may be selected as the indicator bit. The type of the instruction information representing the specific indication bit can be set according to actual requirements, for example, when the indication bit is 0, the instruction information representing the instruction is an authentication instruction; when the instruction bit is 1, the instruction information is an update instruction.

After determining the instruction type, a corresponding lookup table may be determined. For example, when the determined instruction type is an authentication instruction, the lookup table is an authentication lookup table.

By setting the instruction bit in the instruction information, the consumable chip can conveniently determine the type of the instruction information, and then corresponding response data is fed back to the printing imaging equipment according to the type of the instruction information.

Step S202, corresponding response data is searched through a pre-stored lookup table according to the data to be processed.

In this embodiment, the lookup table is determined based on all data, algorithms and/or key parameters that the printing imaging device may send. The query form is a form storing the corresponding relation between the data to be processed and the response data. The response data may be determined by looking up the form after the data to be processed is obtained.

The query form is stored in the consumable chip, specifically, response data corresponding to an instruction sent by the printing imaging device is determined by using an algorithm and/or a key parameter when the consumable chip is produced, and the response data is stored in the query form.

For example, when the instruction transmitted by the printing image forming apparatus is an authentication instruction, the data to be processed transmitted by the printing image forming apparatus is a random number "0x87,0x68", the response data corresponding to the random number is determined to be "0x7f,0x54" by the lookup table, and by this data, the printing image forming apparatus can judge whether the corresponding consumable chip passes the authentication. When the consumable chip passes the authentication, the state of the printing imaging equipment can be modified into a standby state or a ready state; in contrast, when the consumable chip fails to pass the authentication, the incompatibility of the consumable chip or the error of the consumable chip can be displayed on the display screen of the printing imaging device, so as to remind the user of replacing the printing consumable.

Step S203, transmitting the response data to the print image forming apparatus.

When the consumable chip determines the response data, the determined response data may be sent to the printing and imaging device, so that the printing and imaging device may acquire the authentication information or consumable parameters of the consumable chip.

Further, after the response data is acquired, the printing imaging device can perform corresponding processing on the printing consumable chip according to the response data. Specifically, when the printing consumable chip fails to pass the verification, the user can be reminded of replacing the printing consumable; when the consumable parameter is below a certain threshold, a prompt message can be sent to the user so that the user can prepare for replacing the printing consumable.

In this embodiment, instruction information sent by a print imaging device is obtained, the instruction information includes data to be processed, and corresponding response data is searched through a pre-stored query form according to the data to be processed, so that the response data is sent to the print imaging device.

Before the following embodiments are described, a brief description of data storage in a consumable chip is provided. As shown in table 1, important parameters are stored in the consumable chip. Where the address where the data is stored is encoded starting from "0x00", for the first 0x10 bytes (i.e., addresses "0x00" to "0x 0F") being read-only areas, data updates will not be made to them permanently. In the prior art, the addresses 0x00 to 0x07 are used for storing the key parameters participating in the calculation of the authentication verification data, and the key parameters are not required to be stored by the method of the application. The 0x10 to 0x1F addresses are used for data update and reading during operation of the printing image forming apparatus, for example, the 0x15 addresses are used for storing ink quantity parameters.

Table 1 parameter storage table

0x23

0x60

0x34

0x55

0x66

0x12

0x22

0x31

0x57

0x85

0x02

0x34

0x69

0x75

0x49

0x36

0x00

0x64

0x00

0x40

On the basis of the above embodiments, the embodiments of the present invention provide another embodiment, which illustrates how to authenticate the consumable chip.

According to the data to be processed, searching corresponding response data through a pre-stored lookup table, wherein the method comprises the following steps: and searching response data corresponding to the random number in a prestored authentication inquiry form, wherein the response data is used for the printing imaging equipment to identify the consumable chip. The instruction information is an authentication instruction, and the data to be processed included in the authentication instruction is a random number generated by the printing imaging equipment.

In this embodiment, after receiving the instruction information sent by the printing and imaging device, the consumable chip may determine whether the instruction information is an authentication instruction, and when the instruction information is an authentication instruction, determine that the required form is an authentication query form. At this time, the data to be processed is a random number generated by the printing image forming apparatus, the response data corresponding to the random number can be determined by authenticating the lookup table, and the response data may be verification data.

Here, two random numbers are obtained by way of example. For example, the random number acquired from the printing image forming apparatus may be a combination of any two data between 0x00 and 0 xFF. From the algorithm and key parameters used to calculate the response data, an authentication form 1 as shown in table 2 can be obtained.

Table 2 authentication form 1

The authentication form stored in the consumable chip may be in a format shown in table 2, and after the random number sent by the printing imaging device is obtained, check data corresponding to the random number may be searched from the authentication form. For example, when the random number transmitted by the print imaging device is "0x00,0x02", the check data is "0x30,0xb7", and the consumable chip may transmit the queried check data to the print imaging device.

The authentication form 1 shown in table 2 is an authentication form that is orderly arranged in accordance with a random number transmitted from the printing image forming apparatus. The authentication form may be an authentication form that is not ordered, such as the authentication form 2 shown in table 3 below.

Table 3 authentication form 2

Random number	Verifying data
		0x45,0x35	0x84,0x3A
0x87,0x68	0x7F,0x54
		0x79,0x37	0xE4,0x80
......	......
		0x11,0x69	0xDD,0x38

When the consumable chip is authenticated, the algorithm and the key parameters required by acquiring the check data are not stored in the consumable chip, but the authentication form determined according to the information is stored in the consumable chip, wherein the authentication form is generated through a CRC check algorithm, and the specifically used algorithm is difficult to calculate through the authentication form, so that the algorithm used by a competitor is not easy to crack, and the safety is improved.

On the basis of the foregoing embodiments, an embodiment of the present invention provides yet another embodiment, which describes how to determine consumable parameters of a consumable chip.

According to the data to be processed, searching corresponding response data through a pre-stored lookup table, wherein the method comprises the following steps: and searching corresponding response data through a pre-stored parameter lookup table according to the data to be processed, wherein the response data is used for representing the current value of the consumable parameter, and the instruction information is an updating instruction for updating the consumable parameter in the consumable chip.

In the present embodiment, when the instruction information transmitted by the print imaging apparatus is an update instruction, the parameter lookup table may be determined. The data stored in the parameter lookup table are the corresponding relations between different data to be processed and the current value of the consumable parameter. The data to be processed is expressed as consumable parameters in a preset time period, and the preset time period is a period from the last time of updating the consumable parameters to the current time.

The consumable parameters may be data such as ink volume data, printing page number data, printing time length, and the like, and specifically may be data remaining in the printing consumable, remaining printing page number data, remaining printing time length data, and the like. For the remaining printing duration, the consumable chip can be continuously used for a long time, for the printing consumable, when the printing consumable is placed into the printing imaging equipment, the printing consumable is in a state of being exposed to the air, and if the printing consumable is continuously used, the service life of the printing imaging equipment can be influenced under the condition that the ink or the carbon powder is exposed to the air for a long time. Thus, the remaining print duration data of the printing supplies can also be recorded by a parameter lookup table. As shown in the following table, the correspondence between the data to be processed and the response data (ink amount data) is shown.

Table 4 parameter lookup table 1

Data to be processed	Response data (ink quantity data)
		0x00	0x64
0x01	0x63
		0x02	0x62
0x03	0x61
		0x04	0x60
0x05	0x5F
		.....	......
0x63	0x01
		0x64	0x00

The initial ink amount data of the printing consumables can be determined to be 0x64 through the parameter lookup table 1 in table 4, and when the data to be processed sent by the printing imaging device is 0x04, the ink amount data can be determined to be 0x60 through the parameter lookup table.

When the consumable parameters of the consumable chip are determined, the subtraction algorithm or the addition algorithm for determining the consumable parameters is not stored in the consumable chip, but the parameter query form determined according to the information is stored in the consumable chip, so that the algorithm used by the competitor is not easy to crack, and the safety can be improved.

Optionally, sending the response data to the printing imaging device includes:

updating the consumable parameters stored in a preset address into the response data after the corresponding response data are searched; acquiring a reading instruction sent by the printing imaging equipment, wherein the reading instruction is used for reading the consumable parameters currently stored in the consumable chip; and reading the consumable parameters stored in the preset address according to the reading instruction, and sending the consumable parameters stored in the preset address to the printing imaging equipment.

In this embodiment, after determining the response data, the response data needs to be further sent to the printing and imaging device, specifically, the determined response data may be stored in a preset address, the printing and imaging device may send a reading instruction to the consumable chip, and the consumable parameter stored in the preset address in the consumable chip is determined by the reading instruction. Specifically, the printing imaging device may send a reading instruction once every preset time; the print image forming apparatus may transmit the read instruction after transmitting the update instruction.

For example, the 0x15 address of the consumable chip is an address where the ink amount data is stored, and when the ink amount data is determined to be 0x60, the ink amount data 0x60 may be stored in the address 0x15, and when the printing image forming apparatus is reading the ink amount data, the data in the address 0x15 is directly read. The embodiment of the invention does not limit the address of the storage consumable parameter, and can be set according to actual needs.

Through storing the consumable parameter in the appointed address of consumable chip, can realize the storage to the consumable parameter for print imaging equipment when needs direct reading can, can conveniently print imaging equipment and acquire the consumable parameter.

Optionally, according to the data to be processed, searching corresponding response data through a pre-stored parameter lookup table, including:

and searching response data corresponding to the data to be processed in a pre-stored parameter lookup table.

In this embodiment, when determining the response data according to the to-be-processed data, the to-be-processed data may be queried from the column of the to-be-processed data of the parameter query form, and after determining the position of the to-be-processed data in the parameter query form, the response data in the same line as the to-be-processed data is the corresponding response data.

After the response data is determined, consumable parameters in the preset address need to be updated into the response data, and after the response data is updated, the parameter lookup table can be updated. For example, when the response data is ink amount data, the parameter lookup table will change when it is queried that the ink amount data is 0x60, so that the parameter lookup table can be updated.

In the embodiment, after the consumable parameters are updated, the parameter lookup table can be updated, so that response data can be directly determined after the data to be processed are acquired next time, and the method has the advantage of being fast in response.

Optionally, the parameter lookup table includes a first column and a second column, where each data to be processed is located in the first column, and each response data is located in the second column; correspondingly, updating the parameter lookup table comprises the following steps: subtracting the data to be processed in the instruction information from each data in the first column and storing the data.

As shown in table 5, the parameter lookup table 2 is an updated parameter lookup table. It can be found from the lookup table that the response data is 0x60 when the data to be processed is 0x00, and from the parameter lookup table 1 that the response data is 0x64 when the data to be processed is 0x00, that is, the ink amount data in the parameter lookup table 2 is not the initial ink amount data 0x64, so the table is the updated table. When the updated parameter lookup table is determined, the acquired data to be processed needs to be subtracted from the data in the column of the data to be processed, so that the updated parameter lookup table can be obtained. Alternatively, each piece of data in the second column may be subtracted from the data to be processed in the instruction information and stored to obtain the updated parameter lookup table.

Table 5 parameter lookup table 2

Data to be processed	Response data (ink quantity data)
		0xFC	0x64
0xFD	0x63
		0xFE	0x62
0xFF	0x61
		0x00	0x60
0x01	0x5F
		.....	......
0x5F	0x01
		0x60	0x00

Fig. 3 is a flow chart of searching corresponding response data according to a parameter lookup table according to an embodiment of the present invention.

According to the data to be processed, searching corresponding response data through a pre-stored parameter lookup table, wherein the method comprises the following steps:

s301, judging whether consumable parameters stored in the consumable chip are updated. If yes, sequentially executing S302, S303 and S304; if not, S305 is performed.

Wherein whether updated may be determined in a number of ways. For example, by querying the number of times the memory address storing the consumable parameter is written with data, it can be determined whether the consumable parameter has been updated. Alternatively, the consumable parameter may be compared to an initial value, e.g., 0x64 for the initial consumable parameter, and if the current consumable parameter has a value of 0x64, it is considered not updated, and if it is less than 0x64, it is considered updated.

S302, inquiring the data to be processed corresponding to the consumable parameters stored currently through the parameter inquiry form according to the consumable parameters stored currently.

S303, adding the queried data to be processed and the data to be processed in the instruction information to obtain updated data to be processed;

S304, searching response information corresponding to the updated data to be processed in the parameter lookup table.

S305, searching response data corresponding to the data to be processed in the instruction information in a pre-stored parameter lookup table.

When the consumable parameters are updated, the corresponding data to be processed can be queried reversely through the consumable parameters stored currently, and the data to be processed represent the data to be processed sent by the printing imaging equipment before. Therefore, when determining the updated data to be processed, the data to be processed corresponding to the reverse query and the data to be processed in the instruction information need to be added to obtain the updated data to be processed, and then the response data is determined according to the updated data to be processed.

For example, if the consumable parameter currently stored is 0x60, the to-be-processed data is determined to be 0x04 by reverse query, and the to-be-processed data in the instruction information is 0x04, the updated to-be-processed data is 0x08, and then the response data is determined to be 0x5C according to the parameter query form.

For another example, if the received data to be processed in the instruction information sent by the printing and imaging device is 0x03 and it is queried that the current consumable parameter (for example, ink volume data) has been updated to 0x62, the data to be processed of the corresponding printing and imaging device is obtained by reverse query to be 0x02, and therefore, the received data to be processed 0x03 and the queried data to be processed 0x02 are added to obtain updated data to be processed to be 0x05, and the response data (ink volume data) is obtained by query to be 0x5F.

Conversely, when the consumable parameters are not updated, response data corresponding to the data to be processed in the instruction information can be directly searched in a pre-stored parameter lookup table. For example, when the data to be processed in the instruction information is 0x04, the direct lookup table may determine that the response data is 0x60.

The reverse query method can determine the response data when the parameter query form is not updated, and can conveniently determine the response data when the parameter query form is not updated.

For any of the foregoing embodiments, the method further comprises:

determining all possible values of the data to be processed acquired from the printing and imaging device; for each possible value, determining response data corresponding to the possible value according to an algorithm for calculating the response data and/or key parameters of the consumable chip; creating a lookup table, wherein the lookup table comprises the corresponding relation between each possible numerical value and response data; and burning the query form into the consumable chip.

When determining the lookup table, the response data needs to be determined according to the algorithm for calculating the response data and/or the key data of consumable parameters and the data to be processed, so that the data to be processed sent by the printing imaging device can be determined first.

For example, when determining the authentication lookup table, the data to be processed is a random number, which may be one or more. When the number of random numbers is two, then the possible values of all two random numbers need to be obtained, for hexadecimal numbers, the random number is a combination of any two data between 0x00 and 0 xFF.

After all possible values of the data to be processed have been determined, response data need to be determined for each value. For example, the authentication lookup table may be a table generated based on a hexadecimal cyclic redundancy check, CRC, 16, algorithm. Specifically, a check polynomial of 0x1021 in the CRC16 check algorithm may be used for calculation. Calculation is required in determining the verification data according to the key parameters of the consumable chip, for example, the key parameters are '0 x23,0x60,0x34,0x55,0x66,0x12,0x22,0x 31' in hexadecimal. From each set of random numbers, response data is determined by a CRC16 check algorithm and key parameters. For example, when the random number is "0x00,0x01", the response data is "0x00,0xd4".

After determining the response data corresponding to each possible value, a lookup table may be determined according to all possible values and the corresponding response data, where each possible value has a correspondence with the response data in the lookup table. And finally, the determined query form can be burnt into the consumable chip, so that the response data can be determined through the query form in the consumable chip.

According to the method, the query form is stored in the consumable chip in advance, after the data to be processed sent by the printing and imaging equipment is obtained, the response data is determined according to the query form, the algorithm and/or key data for determining the query form are not required to be stored, so that important algorithm and key data can be prevented from being cracked, in addition, after the consumable parameters are updated to the response data, the parameter query form can be updated, and the response data corresponding to the data to be processed can be directly determined through the updated parameter query form; when the parameter query form is not updated, the updated data to be processed can be determined based on the reverse query method, and then the response data is determined according to the updated data to be processed.

Fig. 4 is a schematic flow chart of authenticating a consumable chip according to an embodiment of the present invention. As shown in fig. 4, the authentication process includes:

s401, generating an authentication inquiry form according to the algorithm and the key parameters.

S402, burning the generated authentication inquiry form to a consumable chip.

S403, receiving an instruction sent by the printing imaging device, wherein the instruction comprises a random number.

S404, judging whether the received instruction is an authentication instruction, if so, executing S405; if not, ending.

S405, determining response data according to the random number and the authentication lookup table sent by the printing imaging device.

S406, the acquired response data is sent to the printing imaging device.

Fig. 5 is a schematic flow chart of updating consumable parameters of a consumable chip according to an embodiment of the present invention, where, as shown in fig. 5, the consumable parameter updating process includes:

s501, generating a parameter lookup table according to key parameters of the consumable chip, wherein the key parameters can be initial parameters of the consumable, such as initial ink quantity data.

S502, burning the generated parameter lookup table to a consumable chip.

S503, receiving an instruction sent by the printing imaging device, wherein the instruction comprises data to be processed.

S504, judging whether the received instruction is an update instruction, if so, executing S505; if not, ending.

S505, determining response data according to the data to be processed and the parameter lookup table sent by the printing imaging equipment.

S506, updating the consumable parameters stored in the preset address into response data.

Fig. 6 is a schematic structural diagram of a consumable chip according to an embodiment of the present invention, where the consumable chip includes an interface circuit, a control circuit, and a memory circuit.

The interface circuit is used for realizing communication and access with external equipment, and the composition of the interface circuit can be determined according to a communication mode. For example, when the communication mode is contact communication, the interface circuit may include a number of electrical contacts; when the communication mode is non-contact communication, the interface circuit may include an antenna, a coil for wireless communication.

The control circuit is used for realizing the table look-up processing method. For example, an instruction transmitted from the print image forming apparatus is recognized, and the control circuit may be realized by ASIC, CPU, MCU, SOC or the like in response to the instruction, reading and writing to the memory circuit, or the like.

The memory circuit is used for storing information related to the printing consumable, including the response data and other data. The memory circuit can be EEPROM, ferroelectric memory, flash, SRAM, DRAM and other common memories, and can be matched with power supply devices such as capacitor, battery and the like when SRAM and DRAM are adopted. The interface circuit, the control circuit and the storage circuit can be realized on one wafer in an integrated mode, and the circuits can be fixed on a printed circuit board, so that the transportation, the installation and the use are convenient. The printed circuit board may be a hard board or a flexible board.

Fig. 7 is a schematic structural diagram of a lookup table processing device according to an embodiment of the present invention. As shown in fig. 7, the apparatus may include:

an acquiring module 701, configured to acquire instruction information sent by a print imaging apparatus, where the instruction information includes data to be processed.

And the searching module 702 is configured to search corresponding response data through a pre-stored lookup table according to the data to be processed.

A transmitting module 703 configured to transmit the response data to the print imaging apparatus.

The device provided in this embodiment may be used to implement the technical solutions of the method embodiments shown in fig. 1 to 5, and its implementation principle and technical effects are similar, and this embodiment is not repeated here.

Fig. 8 is a schematic structural diagram of another consumable chip according to an embodiment of the present invention. As shown in fig. 8, the consumable chip of the present embodiment may include:

at least one processor 801; and

a memory 802 communicatively coupled to the at least one processor;

wherein the memory 802 stores instructions executable by the at least one processor 801, the instructions being executable by the at least one processor 801 to cause the consumable chip to perform the method according to any of the embodiments described above.

Alternatively, the memory 802 may be separate or integrated with the processor 801.

The implementation principle and technical effect of the consumable chip provided in this embodiment can be referred to the foregoing embodiments, and will not be described herein again.

The embodiment of the invention also provides a table look-up processing system, which comprises the consumable chip and the printing imaging equipment according to any one of the previous embodiments; the printing imaging equipment is used for sending instruction information to the consumable chip and receiving response data fed back by the consumable chip according to the instruction information.

In the table look-up processing system provided by the embodiment of the invention, specific working principles, processes and beneficial effects of the consumable chip and the printing imaging device can be referred to the foregoing embodiments, and will not be repeated here.

Embodiments of the present invention also provide a computer-readable storage medium having stored therein computer-executable instructions that, when executed by a processor, implement a method as in any of the previous embodiments.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.

The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to implement the solution of this embodiment.

In addition, each functional module in the embodiments of the present invention may be integrated in one processing unit, or each module may exist alone physically, or two or more modules may be integrated in one unit. The units formed by the modules can be realized in a form of hardware or a form of hardware and software functional units.

The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional modules described above are stored in a storage medium and include instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or processor to perform some of the steps of the methods described in the various embodiments of the invention.

It should be appreciated that the processor may be a central processing unit (Central Processing Unit, CPU for short), other general purpose processors, digital signal processor (Digital Signal Processor, DSP for short), application specific integrated circuit (Application Specific Integrated Circuit, ASIC for short), etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.

The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.

The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral ComponentInterconnect, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of the present invention are not limited to only one bus or to one type of bus.

The storage medium may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an application specific integrated circuit (Application Specific Integrated Circuits, ASIC for short). It is also possible that the processor and the storage medium reside as discrete components in an electronic device or a master device.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. A method for table lookup processing, applied to a consumable chip, the method comprising:

transmitting the response data to the printing imaging device;

the instruction information is an authentication instruction, and the data to be processed included in the authentication instruction is a random number generated by the printing imaging equipment;

2. The method of claim 1, wherein the instruction information further comprises an instruction bit, the method further comprising:

3. The method according to claim 1, wherein the instruction information is further an update instruction for updating consumable parameters in the consumable chip;

4. A method according to claim 3, wherein transmitting the response data to the print imaging device comprises:

5. A method according to claim 3, wherein searching for corresponding response data from the data to be processed via a pre-stored parameter lookup table comprises:

6. The method of claim 5, wherein the parameter lookup table includes a first column and a second column, wherein each data to be processed is located in the first column and each response data is located in the second column;

7. A method according to claim 3, wherein searching for corresponding response data from the data to be processed via a pre-stored parameter lookup table comprises:

8. The method as recited in claim 7, further comprising:

9. The method according to any one of claims 1-8, further comprising:

and burning the query form into the consumable chip.

10. A lookup table processing device, characterized in that it is applied to a consumable chip, said device comprising:

a transmitting module configured to transmit the response data to the print imaging apparatus;

the searching module is specifically configured to:

11. A consumable chip, comprising:

at least one processor; and

a memory communicatively coupled to the at least one processor;

Wherein the memory stores instructions executable by the at least one processor to cause the consumable chip to perform the method of any one of claims 1-9.

12. A printing system, comprising: the consumable chip of claim 11, and a print imaging device;

13. A computer readable storage medium having stored therein computer executable instructions which, when executed by a processor, implement the method of any of claims 1-9.