CN103366136B - Imaging device and storage chip communication encryption method - Google Patents
Imaging device and storage chip communication encryption method Download PDFInfo
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- CN103366136B CN103366136B CN201210102062.4A CN201210102062A CN103366136B CN 103366136 B CN103366136 B CN 103366136B CN 201210102062 A CN201210102062 A CN 201210102062A CN 103366136 B CN103366136 B CN 103366136B
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Abstract
The present invention provides a kind of imaging device and storage chip communication encryption method, the control section of imaging device includes data generating unit, be stored with P channel conversion rule in the storage part of storage chip, P channel conversion rule of the identical that is accordingly stored with memory cell, P is greater than or equal to 1 integer；Data generating unit randomly generates a channel conversion rule A, channel conversion rule A is sent to storage chip by imaging device according to the P channel conversion rule channel conversion of one of them, storage chip receives channel conversion rule A according to the channel conversion of P channel conversion rule, and carries out next round data communication using channel conversion rule A channel conversion；When information source sends data message to the stay of two nights, data message is sent to the stay of two nights by information source according to channel conversion rule A channel conversion, and the stay of two nights receives data message according to channel conversion rule A channel conversion；Communication data can be prevented effectively from using the present invention it is disassembled and cracks.
Description
Technical field
The present invention relates to the encryption method that a kind of imaging device and storage chip are communicated, specifically, be related to it is a kind of into
The method being encrypted as the communication information between equipment and storage chip.
Background technology
Imaging device described in the present invention refer to by the electric signals such as word, pattern be converted on the media such as paper formed can
The equipment of visible image, such as printer of ink-jet approaches or laser class, duplicator, facsimile machine and all-in-one multifunctional machine.
In communication field, send instruction side and be referred to as " information source ", the path that director data passes through is referred to as " channel ", recipient
Referred to as " stay of two nights ", above three professional word is introduced into the communication of imaging device and storage chip by the present invention, imaging device and
" channel " communicated between storage chip includes：Communications protocol and communication signal line；Wherein, communications protocol is typically assisted using SPI
View or IIC agreements, SPI protocol is usually using three signal lines：Clock SCK, bi-directional data DATA and piece select CS, and IIC agreements are then
Usually using two signal lines：Clock SCL and bi-directional data SDA.When imaging device communicates with storage chip, five lines are generally used
Connection：Clock SCK, bi-directional data DATA, piece select CS, power supply VCC, ground wire GND, in this way, generally by hardware design into can be simultaneous
Hold the structure type using SPI protocol and IIC agreements, because the clock SCK and bi-directional data DATA needed for SPI protocol can
To correspond to the clock SCL and bi-directional data SDA in IIC respectively.
Consumable container is the container for providing the splendid attire consumptive material such as carbon dust or ink of imaging to imaging device.
As shown in Figure 1 and Figure 2, storage chip 13 is general all on the housing of consumable container, and storage chip 13 has one
Block substrate 16, is provided with electronic module 17 on substrate 16, and electronic module 17 is used to store the number needed for communicating with imaging device
According to the communication between realization and imaging device, including the communication part and integrated electricity for receiving imaging device signal and electric energy
Road part, communication part is usually to include a memory cell and one in electric contact or induction coil, Integrated circuit portion
The data produced in data related to consumable container and imaging process are stored in control unit, memory cell, including：Consumptive material holds
Device manufacturer code, the consumable container date of manufacture, consumable container model, be applicable region, assembly picture amount, consumed imaging page
Consumable items allowance, the initial use time of consumable container, upper imaging operation time etc. in number, consumable container.Control unit is with depositing
Storage unit is connected, the data access for controlling memory cell.When consumable container is installed on imaging device, imaging device from
Memory cell in storage chip reads data, first determines whether whether the consumable container is applied to the imaging device；When consumptive material holds
Device was used after a period of time, and imaging device can also read consumable items allowance information or assembly picture amount in memory cell to judge whether
It can continue to carry out image forming job, it can be seen that, data communication is carried out between imaging device and storage chip in real time, with from storage
Various data messages are obtained in chip；Imaging device also can send various data messages to storage chip, so as to update storage core
Corresponding data information in piece.Above-mentioned data message can then cause the massive losses of production firm once being obtained by wrongful.
In order to ensure the safety of the data communication between imaging device and storage chip, prevent above-mentioned data message from being obtained by wrongful,
When manufacturing and designing imaging equipment, the DEA that is stored with encryption technology, the storage part of imaging device is often introduced
With data decipherment algorithm, the control section of imaging device sets encryption/decryption control module, to realize imaging device and storage core
Encryption communication between piece.The method of encryption communication is usually to be provided with the memory cell of storage chip and imaging device phase
Same data encryption and data deciphering algorithm, referring to Fig. 3, when imaging device accesses storage chip, first by instruction, data sequence etc.
After data message is encrypted, storage chip is sent in the form of encryption information, storage chip receives above-mentioned encryption information
Afterwards, first it is decrypted, then carries out corresponding read or write, then after the data messages such as instruction, data sequence are encrypted,
Send back imaging device；Imaging device is received after encryption information from storage chip, and to be also decrypted could obtain really
Data message, in this way, realizing the communication encryption between imaging device and storage chip.However, the above method is by logical
The data message of news is encrypted and decrypted to realize, is often easy to be cracked by other people, so as to cause the data letter of communication
Breath is wrongly obtained.Make the data message of communication safer, be the target that people constantly pursue, and the hand that other people crack
Section is typically the data message of collection communication, to carry out dis-assembling.
The content of the invention
The main object of the present invention be to provide it is a kind of effectively prevent other people and cracked using dis-assembling means imaging device and
The encryption method of storage chip communication.
To achieve the above object, the imaging device that provides of the present invention is with storage chip communication encryption method：Imaging device
Including control section and storage part, storage chip includes control unit and memory cell, and it is single that control section includes data generation
Be stored with P channel conversion rule in member, storage part, P channel conversion rule of the identical that is accordingly stored with memory cell
Then, wherein, P is greater than or equal to 1 integer；The communication encryption method is as follows：Data generating unit randomly generates a channel
Transformation rule A, imaging device sends channel conversion rule A according to the P channel conversion rule channel conversion of one of them
To storage chip, storage chip receives channel conversion rule A, and application letter according to the channel conversion of P channel conversion rule
Road transformation rule A channel conversion carries out next round data communication；When information source sends data message to the stay of two nights, information source is by number
It is believed that breath is sent to the stay of two nights according to channel conversion rule A channel conversion, the stay of two nights comes according to channel conversion rule A channel conversion
Receive data message.
From above scheme, this method is to carry out data message according to the channel conversion of a certain channel conversion rule
Communication, due to being provided with more than one identical channel conversion rule in imaging device and storage chip, the two is entering line number
Before communication, imaging device produces a channel conversion rule by data producer, is then advised according to a channel conversion
The channel conversion rule is sent to storage chip by channel conversion then, and storage chip is then advised using all channel conversions respectively
Above-mentioned channel conversion is regular to receive for channel conversion then, only using the channel with imaging device identical channel conversion rule
Transform method, storage chip can just receive data, in this way, storage chip can determine letter used in next round data communication
Road transformation rule.Because in communication process, data generating unit randomly produces channel conversion rule, the channel of data communication
In the state for not stopping conversion, other people are difficult the channel for obtaining data communication（I.e.：Path）, it more difficult to obtain the interior of communication data
Hold,, can not be by all communications because data volume is too big even if gathering communication data using data acquisition unit or oscillograph
Data carry out complete collection and cracked to carry out dis-assembling；Thus, the encryption between imaging device and storage chip is effectively realized
Communication, it is to avoid communication data is obtained by wrongful.
Its further technical scheme is that channel includes communications protocol.
From upper scheme, identical protocol conversion method is used using imaging device and storage chip, i.e., into
Before equipment and storage chip progress data communication, the transform method for communications protocol of making an appointment, such as：SPI associations are used alternatingly
Negotiation IIC agreements carry out data communication, and so, other people are difficult to learn that communication data is transmitted by which kind of communications protocol,
It is difficult to intercept and capture communication data, even if using data acquisition unit or oscillograph, also due to data volume is excessive can not also to complete data
Collection is cracked with carrying out dis-assembling, and the communication data safety of imaging device and storage chip has been effectively ensured.
Its further technical scheme is that channel includes communication signal line.
Imaging device and storage chip are before data communication is carried out, the transformation rule for communication signal line of having made an appointment,
Due to other people it is difficult to obtain the transformation rule of communication signal line, and, it is also difficult to the communication of whole is obtained from a certain signal wire
Data, it is to avoid communication data is trapped, and effectively realizes the encryption communication of imaging device and storage chip.
Its further technical scheme is also be stored with storage part DEA and data decipherment algorithm；Deposit
Accordingly be stored with identical DEA and data decipherment algorithm in storage unit；Communication encryption method also includes：Information source
After data message is encrypted first application data AES, sends and add according still further to channel conversion rule A channel conversion
Close data message；After data message of the stay of two nights according to channel conversion rule A channel conversion to receive encryption, data are reapplied
Decryption method decrypts the data message of encryption, then performs data read/write operation.
From upper scheme, the method by encrypting and being sent according to random change channel conversion rule by data message,
Imaging device is carried out with storage chip before data communication, after information source encrypts data message, according to agreed upon channel transformation rule
To transmit, the stay of two nights is received by the channel conversion rule of agreement, then encryption data is decrypted.In this way, equivalent to realization
To data message and the double-encryption of data transmission channel, increase the difficulty cracked, other people be difficult obtain imaging device and
The communication data of storage chip, is prevented effectively from data message and is cracked, and realizes the encryption communication of imaging device and storage chip.
Brief description of the drawings
Fig. 1 is the structural representation of existing storage chip.
Fig. 2 is the structural representation of the Integrated circuit portion of existing storage chip.
Fig. 3 is the schematic diagram of encryption communication between existing imaging device and storage chip.
Fig. 4 be the schematic diagram of the embodiment of the present invention, i.e., one between laser printer and storage chip encryption communication show
It is intended to.
Fig. 5 is the flow chart of the embodiment of the present invention.
Fig. 6 is the communication signal line conversion schematic diagram of the embodiment of the present invention.
Fig. 7 is the protocol conversion schematic diagram of another embodiment of the present invention.
The present invention is further illustrated with reference to the accompanying drawings and examples.
Embodiment
Embodiment
The storage chip structure of the present embodiment is similar to the existing structure of storage chip 13, and difference is the group of memory cell
Into referring to Fig. 4, being stored with this example in the memory cell of storage chip：DEA, data deciphering algorithm, 2 channels
Transformation rule.The storage part of laser printer is accordingly stored with：Identical DEA, identical data deciphering are calculated
Method and more than one identical channel conversion rule, the control section of laser printer is provided with to be led to storage chip progress data
The encryption of news and decryption control module and data generating unit, data generating unit are used to randomly produce the change of communication signal line
The data sequence of rule is changed, data generating unit can be realized using hardware, such as data producer, it would however also be possible to employ Software for Design
Realize：The module that design data produces function is integrated into the control section of laser printer.
Encryption communication method between laser printer and storage chip is：The data generating unit of laser printer is random
A communication signal line transformation rule is produced, laser printer advises communication signal line transformation rule according to 2 signal wire conversion
Then the communication signal line of one of them, which becomes to bring, is sent to storage chip, and storage chip is according to 2 communication signal line transformation rules
Communication signal line become and bring and receive the communication signal line transformation rule respectively, and the application communication signal line transformation rule is logical
News signal wire, which becomes, brings progress next round data communication；When information source sends data message to the stay of two nights, information source elder generation application data adds
After data message is encrypted close algorithm, by communication signal line of the ciphered data information according to communication signal line transformation rule
Conversion is sent to the stay of two nights, and the stay of two nights becomes to bring according to the communication signal line of communication signal line transformation rule receives the ciphered data information
Afterwards, reapply data decryption method to decrypt the ciphered data information, then perform data read/write operation.Work as laser printer
When sending data to storage chip, laser printer is information source, and storage chip is the stay of two nights；When storage chip is sent out to laser printer
When sending data, storage chip is information source, and laser printer is the stay of two nights.
Referring to Fig. 5, the present embodiment to implement process as follows：
Communication signal line transformation rule in this example includes A modes and B modes, and A modes are that 1 line is SCK, and 2 lines are
DATA, B mode are that 1 line is DATA, and 2 lines are SCK.
If laser printer carries out data communication first with storage chip, the communication signal line that must arrange to use in advance becomes
Rule is changed, the data generating unit of laser printer produces a communication signal line transformation rule A, calculated by data encryption first
Become A1 after method encryption, then by communication signal line transform method of the laser printer according to a communication signal line transformation rule A
To send communication signal line transformation rule A to storage chip, storage chip then becomes according to all communication signal lines in memory cell
Change the communication signal line transform method of rule（That is connected mode, including A modes and B modes）To receive the communication of the encryption respectively
Signal wire transformation rule, is only converted according to the communication signal line corresponding with laser printer communication signal line transformation rule A
Rule（A modes）The communication signal line transformation rule after above-mentioned encryption can be just received, in this way, next storage chip is recognized
The communication signal line transformation rule A that data communication is used is carried out, and is marked in the memory unit, laser printer and storage core
Piece has determined that the follow-up transformation rule for carrying out communication signal line during data communication, i.e.,：Communication data is sent out by which signal line
Send.
If laser printer and storage chip are not to carry out data communication first, due to storage chip can mark it is last round of
The communication signal line transformation rule A of data communication, after laser printer is started shooting or changes cartridge again, laser printer
Powered to storage chip, last round of laser printing successively cryptographically can be read from storage chip using A modes and B modes
The communication marked in the communication signal line transformation rule A that machine is used with storage chip data communication, i.e., last round of data communication
Signal wire transformation rule, likewise, only one of which can obtain correct information in A modes and B modes.A modes are used in this example
Correct information, i.e. laser printer could be obtained can just obtain correct information by 2 lines transmission data, and passes through 1 line and send out
When sending data, it is impossible to obtain normal response from storage chip, correct information can not be returned.
A data communication more than, laser printer and storage chip know currently employed communication signal
Line connected mode is A.In this way, during laser printer start-up operation, storage chip is accessed by 2 lines, storage chip its is obtained
Its specifying information, to verify whether storage chip is legal effectively.In the course of work of laser printer, the number of laser printer
Communication signal line transformation rule B can be randomly produced according to generation unit, and the encrypting-decrypting module of laser printer is by communication signal
After line transformation rule B encryptions, storage chip is sent to according to A modes, storage chip receives logical after above-mentioned encryption according to A modes
Signal wire transformation rule B is interrogated, it is decrypted A modes or B modes is used during next data communication to differentiate, storage chip is once
Know that communication signal line transformation rule is changed to B modes by A modes, the communication signal line of oneself use can be adjusted immediately and is returned
Information is to laser printer, while new communication signal line transformation rule B is tagged in memory cell.In this way, laser printing
Machine will randomly convert communication signal line with storage chip.The notice of communication signal line transformation rule is produced by laser printer
Give birth to and send storage chip to after encrypting, if when to decode by A modes, when by B modes, then phase
When in cracking two kinds of cipher modes：Data encryption and the conversion of communication signal line, it is larger to crack difficulty, even if using data acquisition
The method of device or oscillograph, can not also gather mass data, it more difficult in being cracked by way of dis-assembling, effectively realize sharp
The encryption communication of optical printer and storage chip.
Fig. 6 is the flow that laser printer and storage chip once change communication signal line transformation rule in data communication
Figure, it is concretely comprised the following steps：
s10：Produce communication signal line transformation rule；The data generating unit of laser printer produces the conversion of communication signal line
Regular B.
s20：Communication signal line transformation rule is encrypted；B is encrypted as by laser printer using DEA
B1。
s30：Information source sends data；Laser printer is sent after encryption according to last round of communication signal line transformation rule
Communication signal line transformation rule B1.
s40：The stay of two nights receives data；Storage chip receives data B1 according to last round of communication signal line transformation rule.
s50：Decryption receives data；It is original communication that storage chip will receive data B1 decryption using data deciphering algorithm
Signal wire transformation rule B.
s60：Conversion communication signal line connected mode simultaneously marks the communication signal line transformation rule；Storage chip is according to can solve
The communication signal line transformation rule received after close converts the connected mode of communication signal line, then converts the communication signal line
Regular marks are currently used state.
s70：Data communication is carried out by the communication signal line transformation rule newly arranged.
Another embodiment of the present invention is the method being combined using protocol conversion and communication data encryption, this method
Similar with the method that above-mentioned use communication signal line is converted and communication data encryption is combined, difference is：Another embodiment
In channel conversion refer to protocol conversion.Referring to Fig. 7, it is assumed that laser printer and the last round of data communication of storage chip
Using SPI protocol, when laser printer is started working, storage chip is accessed using SPI protocol, other tools of storage chip are known
Body information, to verify whether storage chip is legal effectively.The data generating unit of laser printer randomly produces communications protocol
Transformation rule IIC, after laser printer encrypts protocol conversion rule IIC, by the protocol conversion rule of encryption
Storage chip is sent to according to SPI protocol, storage chip receives the protocol conversion rule of encryption according to SPI protocol, then
It is decrypted, IIC agreements or SPI protocol are used during next data communication to differentiate, storage chip knows communications protocol
Transformation rule, the protocol conversion rule oneself used can be adjusted immediately and return information is to laser printer, simultaneously will
New protocol conversion regular marks are into the memory cell of storage chip.In this way, laser printer can with storage chip
Randomly to convert communications protocol.The notice of protocol conversion rule is produced by laser printer and by being sent after encryption
To storage chip, SPI protocol when is used if to decode, when using IIC agreements, then equivalent to cracking
Two kinds of cipher modes：Data encryption and communications protocol rule transformation, crack difficulty than larger, even if using data acquisition unit or showing
The method of ripple device, progress dis-assembling that also substantial amounts of data acquisition can not arrive is cracked, even with SPI protocol or IIC agreements
Exclusive data collector can only collect a part of data, the conversion of the encryption and decryption and communications protocol of data is separate,
It is combined with each other again, makes encryption communication tighter；Moreover, the conversion of two kinds of communication protocol is carried out on same bus, general
Microcontroller（MCU）Or interface of the control unit without compatibility IIC agreements and SPI protocol, so that it is improper to limit other people
The resource selection of exploitation, safeguards the interests of production firm, and the data communication that laser printer and storage chip has been effectively ensured is pacified
Entirely.
As another conversion of laser printer of the present invention and storage chip encryption communication embodiment of the method, it can use
Only the method to protocol conversion carries out data communication, it would however also be possible to employ only carry out data to the method that communication signal line is converted
Communication, or data communication, channel conversion are carried out using the method converted to communication signal line and protocol conversion is combined
Rule can be one, it is possibility to have more than one, as long as realizing the conversion to channel in data communication, it can be achieved
The purpose of the present invention.
It is used as another conversion, institute of the present invention of laser printer of the present invention and storage chip encryption communication embodiment of the method
The method of offer, which can also be directed to, is arranged on ink box chip on ink-jet printer, its specific work process and above method embodiment
It is identical.
The invention is not restricted to the various embodiments described above and conversion, other are based on technical solution of the present invention and without prejudice to mesh of the present invention
Method and combinations thereof change should also include within the scope of the invention as claimed.
Claims (5)
1. imaging device and storage chip communication encryption method, the imaging device include control section and storage part；It is described
Storage chip includes control unit and memory cell；
It is characterized in that：
The control section includes data generating unit；
Be stored with P channel conversion rule in the storage part；
P channel conversion rule of the identical that is accordingly stored with the memory cell；
Wherein, P is greater than or equal to 1 integer；
The communication encryption method is as follows：
The data generating unit randomly generates a channel conversion rule A, and the imaging device is by channel conversion rule A
The storage chip is sent to according to the P channel conversion rule channel conversion of one of them, the storage chip is pressed
The channel conversion rule A, and application channel conversion rule are received according to the channel conversion of P channel conversion rule
A channel conversion carries out next round data communication；
When information source sends data message to the stay of two nights, the information source is by the data message according to channel conversion rule A's
Channel conversion is sent to the stay of two nights, and the stay of two nights receives the data according to channel conversion rule A channel conversion
Information.
2. imaging device as claimed in claim 1 and storage chip communication encryption method,
It is characterized in that：
The channel includes communications protocol.
3. imaging device as claimed in claim 1 or 2 and storage chip communication encryption method, it is characterised in that：
The channel includes communication signal line.
4. imaging device as claimed in claim 3 and storage chip communication encryption method, it is characterised in that：
Also be stored with DEA and data decipherment algorithm in the storage part；Accordingly stored in the memory cell
There are identical DEA and data decipherment algorithm；
The communication encryption method also includes：
After first data message is encrypted using the DEA for the information source, according still further to channel conversion rule
A channel conversion sends the data message of the encryption；The stay of two nights comes according to channel conversion rule A channel conversion
After the data message for receiving the encryption, reapply the data deciphering algorithm and decrypt the data message of the encryption, then
Perform data read/write operation.
5. imaging device as claimed in claim 4 and storage chip communication encryption method, it is characterised in that：
The storage chip is received after the channel conversion rule A, and channel conversion rule A storages is single to the storage
In member and mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210102062.4A CN103366136B (en) | 2012-04-09 | 2012-04-09 | Imaging device and storage chip communication encryption method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210102062.4A CN103366136B (en) | 2012-04-09 | 2012-04-09 | Imaging device and storage chip communication encryption method |
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| Publication Number | Publication Date |
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| CN103366136A CN103366136A (en) | 2013-10-23 |
| CN103366136B true CN103366136B (en) | 2017-07-21 |
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| CN201210102062.4A Expired - Fee Related CN103366136B (en) | 2012-04-09 | 2012-04-09 | Imaging device and storage chip communication encryption method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1473430A (en) * | 2000-11-01 | 2004-02-04 | ���˹���Ѷ��� | Mixed-media telecommunication call set-up |
| CN102082588A (en) * | 2009-11-27 | 2011-06-01 | 索尼公司 | Communication device, communication system, communication method, and program |
| CN102231054A (en) * | 2011-06-08 | 2011-11-02 | 珠海天威技术开发有限公司 | Chip, data communication method for chip, consumable container and imaging equipment |
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2012
- 2012-04-09 CN CN201210102062.4A patent/CN103366136B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1473430A (en) * | 2000-11-01 | 2004-02-04 | ���˹���Ѷ��� | Mixed-media telecommunication call set-up |
| CN102082588A (en) * | 2009-11-27 | 2011-06-01 | 索尼公司 | Communication device, communication system, communication method, and program |
| CN102231054A (en) * | 2011-06-08 | 2011-11-02 | 珠海天威技术开发有限公司 | Chip, data communication method for chip, consumable container and imaging equipment |
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| CN103366136A (en) | 2013-10-23 |
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