CN104077537B - Offer communicates with the certification of replaceable printer unit - Google Patents
Offer communicates with the certification of replaceable printer unit Download PDFInfo
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- CN104077537B CN104077537B CN201410293730.5A CN201410293730A CN104077537B CN 104077537 B CN104077537 B CN 104077537B CN 201410293730 A CN201410293730 A CN 201410293730A CN 104077537 B CN104077537 B CN 104077537B
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- print system
- session key
- printer unit
- replaceable
- session
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/606—Protecting data by securing the transmission between two devices or processes
- G06F21/608—Secure printing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
- B41J29/393—Devices for controlling or analysing the entire machine ; Controlling or analysing mechanical parameters involving printing of test patterns
- B41J2029/3937—Wireless communication between the printer and the cartridge, carriage or printhead
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Bioethics (AREA)
- General Health & Medical Sciences (AREA)
- Computer Hardware Design (AREA)
- Computer Security & Cryptography (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Accessory Devices And Overall Control Thereof (AREA)
Abstract
A kind of replaceable printer unit includes first memory equipment and communication link.First memory equipment storage first is secret.Communication link is configured as that first memory equipment communication is linked to printer controller when replaceable printer unit is installed in print system.Print system includes the secret second memory equipment of storage second.It is linked to printer controller to second memory equipment communication.First memory equipment is configured as being authenticated the communication between first memory equipment and printer controller based on the first secret and the second secret.
Description
Cross reference to related applications
Present patent application is related to entitled " the AUTHENTICATING A REPLACEABLE submitted on the same day with the application
Sequence number ##/the ##, ### of PRINTER COMPONENT ", the PCT Patent Application of attorney docket No. 200800134-1,
The PCT Patent Application is incorporated herein by reference.
Background technology
Current print system typically comprises one or more replaceable printer units, and such as Inkjet Cartridge, ink-jet is beaten
Print head assembly, toner cartridge, ink feeder etc..Some existing systems for these replaceable printer units provide on plate memory with
Information to printer transmission on field-replaceable unit, black fill level, market information etc..
Typically depend on the data that are stored on the plate of replaceable printer unit in memory with suitably operate and with
The replaceable printer unit of track and the print system for wherein installing replaceable printer unit.Therefore, storage onboard stores
Data in device should not be by the use of unauthorized or changing for unauthorized.
For these and other reasons, there are the needs to the present invention.
Brief description of the drawings
Included attached drawing, which is used to providing, to be further understood to embodiment and is incorporated to this specification and forms this theory
A part for bright book.Attached drawing illustrates embodiment and is used for the principle for explaining embodiment together with explanation.To easily it recognize
Many expected advantages of other embodiment and embodiment are known, because they become more preferable by referring to following detailed description
Understand.Element in attached drawing is not necessarily to scale relative to each other.Identical reference numeral represents corresponding similar portion.
Fig. 1 is the block diagram of the one embodiment for illustrating printing equipment.
Fig. 2 is illustrate the method for being used for being authenticated to the communication between replaceable printer unit and print system one
The flow chart of a embodiment.
Fig. 3 is that the request that reads or writes for replaceable printer unit that diagram is used to send print system is authenticated
Method one embodiment flow chart.
Embodiment
In the following detailed description, with reference to the part thereof of attached drawing of composition, and wherein it is shown as diagram
In can implement the particular embodiment of the present invention.At this point, with reference to described figure orientation using such as " top ",
The direction term such as " bottom ", "front", "rear", " guiding ", " trailing ".Due to the component of embodiment can be positioned in it is many different
In orientation, therefore direction term is for the purpose of illustration and is used as limitation absolutely not.It will be understood that without departing from the scope of the present invention
In the case of, using other embodiment and it can carry out structure or change in logic.Therefore, detailed description below is not
It should be considered limiting, and the scope of the present invention is defined by the following claims.
It will be understood that unless stated otherwise, otherwise the feature of various exemplary embodiments described herein can be each other
Combination.
Fig. 1 is the block diagram of the one embodiment for illustrating printing equipment 100.Printing equipment 100 includes host 102 and printing is
System 104.Print system 104 is easy to figure and/or text image being printed upon such as paper, card stock, transparent film, Mai La
Piece（Mylar）, cloth etc. print media 118 on.Print system 104 include such as ink-jet printer, laser printer or
Other appropriate printers.Host 102 communicates with print system 104 and provides data and/or control letter to print system 104
Number.Host 102 can be that such as computer, electric appliance either the multiple information sources of other appropriate equipment or can be included in it
In, other described appropriate equipment such as personal digital assistants（PDA）, digital camera, cell phone etc..
In one embodiment, print system 104 includes printer controller 116, memory devices 122 and replaceable beats
Print machine component 108.Replaceable printer unit 108 includes memory devices 109.In one embodiment, printer controller
116 to memory devices 109 and are printed based on the privacy key being stored in memory devices 109 and in memory devices 122
Communication between machine controller 116 is authenticated.It is therefore prevented that the memory for being stored in replaceable printer unit 108 is set
The reading of the unauthorized of data in standby 109 and/or write.
Printer controller 116 controls the operation of print system 104, and therefore receives data and/or control from host 102
Signal processed.Printer controller 116 communicates via communication link 106 with host 102.Communication link 106 includes such as printer
Electric, optics, infrared or other appropriate information transmission paths between controller 116 and host 102.Printer controller
116 communicate via communication link 120 with memory devices 122.Communication link 120 includes such as printer controller 116 and deposits
Electric, optics, infrared or other appropriate information transmission paths between storage device 122.
Memory devices 122 include nonvolatile memory（NVM）123 and logic 124.In one embodiment, store
Device equipment 122 is anti-tamper or anti-distort.In one embodiment, logic 124 is logic circuit or on a processor
The embedded software of operation.For example, in one embodiment, memory devices 122 include having embedded non-volatile storage
The system-on-chip of device 123（SoC）Or central processing unit（CPU）.In another embodiment, memory devices 122 include tool
There are the SoC or CPU of external non-volatile memory 123.In another embodiment, memory devices 122 include having inside
Or the special logic of external non-volatile memory 123.In another embodiment, memory devices 122 are embedded in interior
In the printer controller 116 of portion or external non-volatile memory 123.
In one embodiment, nonvolatile memory 123 is EEPROM（Electrically erasable programmable read-only memory）、
FLASH（Flash memory）Or another appropriate memory.The storage of nonvolatile memory 123 is used for printer controller
The one or more that communication between 116 and the memory devices 109 of replaceable printer unit 108 is authenticated is secret close
Key.Communication between printer controller 116 and memory devices 109 is authenticated using session key.In order to generate
Session key, request of the printer controller 116 to the transmission session key identifier of memory devices 122 and to session key.
Request in response to the session key identifier and to session key, 124 dialogue-based key identifier of logic circuit and storage
Privacy key in nonvolatile memory 123 generates session key.Logic circuit 124 is then by the session key of generation
It is supplied to printer controller 116.
Replaceable printer unit 108 includes the printing that can be inserted into print system 104 and can be removed from print system 104
The component of system 104.In one embodiment, replaceable printer unit 108 is removed at the end of being included in its service life
And the consumable component being replaced.The example of this consumable component includes ink container or toner cartridge, and it includes some to be used for
The marker material of print system 104.Marker material be deposited on by print system 104 on print media 118 and in ink container or
Exhausted during the service life of person's toner cartridge.Therefore, ink container or toner cartridge are removed simultaneously quilt at the end of its service life
Replace or remanufactured and reused.
In another embodiment, replaceable printer unit 108 is included in printing portion readily replaceable in print system 104
Part.The example of this print member includes printhead, its in response to the control signal from printer controller 116 selectively
Ink is set to be deposited on print media 118；Or printer box, it includes printhead and ink feeder.Therefore, if such as printing system
System 104 includes ink-jet printer, then replaceable printer unit 108 can include ink container, printhead or printer box.This
Outside, if such as print system 104 includes laser printer, replaceable printer unit 108 can include toner cartridge or
Development drum.In addition, replaceable printer unit 108 can include the ancillary equipment of print system 104, such as Ethernet card, double
Face printer（duplexer）, paper reorganizer（For example, attachment means, piercer etc.）Or another appropriate equipment.
Printer controller 116 and replaceable printer unit 108 communicate with one another via communication link 114.When replaceable
When printer unit 108 is installed in print system 104, communication link 114 is easy to printer controller 116 and replaceable printing
Information transmission between machine component 108.Communication link 114 includes for example replaceable printer unit 108 and printer controller
Electric, optics, infrared or other appropriate information transmission paths between 116.
Replaceable printer unit 108 includes memory devices 109, its store be used for replaceable printer unit 108 and/
Or the information of print system 104.Memory devices 109 include nonvolatile memory（NVM）110 and logic 111.In a reality
Apply in example, memory devices 109 are anti-tamper or anti-distort.In one embodiment, logic 111 be logic circuit or
The embedded software run on a processor.For example, in one embodiment, memory devices 109 include having embedded non-
The SoC or CPU of volatile memory 110.In another embodiment, memory devices 109 include depositing with external non-volatile
The SoC or CPU of reservoir 110.In another embodiment, memory devices 109 include having internal or external non-volatile memories
The special logic of device 110.
In one embodiment, nonvolatile memory 110 is 256 bytes or the non-volatile memories of another appropriate size
Device, such as EEPROM, FLASH or another appropriate memory.In one embodiment, memory devices 109 is non-volatile
Property memory 110 stores for example for replaceable 108 specific information of printer unit and/or can be applied to print system 104
Information.In addition, the information that nonvolatile memory 110 can make print system 104 to be used is stored therein or can be with
Information of the record for print system 104.In one embodiment, the information that can be stored in nonvolatile memory 110
Including the operation for replaceable printer unit 108 and/or print system 104 and/or not operation parameter.
Nonvolatile memory 110 is also stored for the communication between memory devices 109 and printer controller 116
The one or more privacy keys being authenticated.In one embodiment, deposit from being stored in the non-volatile of memory devices 122
The export of one or more of reservoir 123 privacy key is stored in being somebody's turn to do in the nonvolatile memory 110 of memory devices 109
One or more privacy keys.In other embodiments, it is stored in memory from one or more public privacy key export
The one or more privacy key in the nonvolatile memory 110 of equipment 109 and be stored in memory devices 122 it is non-easily
The one or more privacy key in the property lost memory 123.Therefore, this be stored in nonvolatile memory 110
Or multiple privacy keys are related to the one or more privacy key being stored in nonvolatile memory 123.
In one embodiment, replaceable printer unit 108 includes communication link 112, when replaceable printer unit
108 when being installed in print system 104, which makes memory devices 109 and 114 electrical couplings of communication link
Or be communicatively coupled, and therefore with 116 electrical couplings of printer controller or communicative couplings.Therefore, when replaceable printer portion
When part 108 is installed in print system 104, memory devices 109 are via communication link 112 and 114 and printer controller
116 communications.Therefore, communication link 112 and 114 includes such as electrical couplings or connection, such as respectively with corresponding electrical node
Or the electric contacting part or plug of socket pairing.
The communication between memory devices 109 and printer controller 116 is authenticated using session key.For life
Into session key, printer controller 116 transmits the request to session key identifier to memory devices 109.In response to right
The request of session key identifier, the logic circuit 111 of memory devices 109 are based on being stored in nonvolatile memory 110
Privacy key generation session key identifier and associated session key.In one embodiment, memory devices 109 are patrolled
Circuit 111 is collected in response to each request to session key identifier, generates different session key identifiers and associated meeting
Talk about key.Therefore, each session key identifier and each associated session key are only only used once.Logic circuit 111 will
The session key identifier generated is supplied to printer controller 116, and session key identifier is delivered to memory by it again
Equipment 122, as described above.
Fig. 2 is the side that diagram is used to be authenticated the communication between replaceable printer unit 108 and print system 104
The flow chart of one embodiment of method 150.At 152, replaceable printer unit 108 is installed in including printer controller
In 116 print system 104.Replaceable printer unit 108 includes memory devices 109, the memory devices 109 by with
It is set to the one or more privacy keys being authenticated for pair communication with print system 104.Print system 104 is also wrapped
Memory devices 122 are included, which has been configured with for pair logical with replaceable printer unit 108
One or more privacy keys that letter is authenticated.
At 154, printer controller 116 passes through 114 and 112 depositing to replaceable printer unit 108 of communication link
109 queued session key identifier of storage device.At 156, in response to receiving the request to session key identifier, storage
The logic circuit 111 of device equipment 109 is requested based on the first privacy key generation being stored in nonvolatile memory 110
Session key identifier and its associated session key.At 158, the logic circuits 111 of memory devices 109 is to printer control
Device 116 processed provides requested session key identifier.
At 160, session key that printer controller 116 will be received by communication link 120 from memory devices 109
Identifier is supplied to memory devices 122 and queued session key.At 162, in response to receiving session key identifier
With the request to session key, the logic circuit 124 of memory devices 122 is based on the session key identifier and storage received
The second privacy key in nonvolatile memory 123 generates requested session key.If on memory devices
Nonvolatile memory of first privacy key with being stored in memory devices 122 in 109 nonvolatile memory 110
The second privacy key in 123 is related, then the session key that logic circuit 111 generates and the session that logic circuit 124 generates are close
Key matches.At 164, it is close that the logic circuits 124 of memory devices 122 to printer controller 116 provides requested session
Key.At 166, printer controller 116 is using the session key received to printer controller 116 and replaceable printer
Communication between the memory devices 109 of component 108 is authenticated.
Fig. 3 is that the request that reads or writes to replaceable printer unit 108 that diagram is used to send print system 104 carries out
The flow chart of one embodiment of the method 166 of certification.At 170, in the memory devices of replaceable printer unit 108
In the case of session key is established in 109 and establishes session key in print system 104, printer controller 116 uses
Its session key and appropriate cryptographic algorithm calculate the first message authentication code for reading or writing request（MAC）.First MAC is
Calculated for the order for reading or writing request and command parameter.In one embodiment, MAC is used in the calculating of the first MAC
Scattered symbol（diversifier）To prevent the Replay Attack for memory devices 109.
In one embodiment, such as Secure Hash Algorithm 1 is utilized（SHA-1）, SHA-2 or other appropriate secure Hash
The secure Hash of algorithm, based on hash message authentication code（HMAC）Calculate the first MAC.In another embodiment, using it is all in full
According to encryption standard（DES）, 3DES, Advanced Encryption Standard（AES）, Rivest cipher code methods 2（RC2）Block cipher（cipher
block）Algorithm or other appropriate block cipher algorithms, according to the MAC based on password（CMAC）Calculate the first MAC.At it
In his embodiment, the first MAC is calculated using another appropriate technology.
At 172, the memory devices 109 of printer controller 116 to replaceable printer unit 108 are sent including
One MAC's reads or writes request.At 174, request is read or write in response to this, the logic circuit 111 of memory devices 109 uses it
Session key and cryptographic algorithm are that the request that reads or writes received calculates the 2nd MAC.At 176, the logic of memory devices 109
Circuit 111 is by the first MAC received compared with the 2nd MAC calculated.
At 178, if the first MAC is matched with the 2nd MAC, the session key and print system of memory devices 109
104 session key matching.Therefore, the communication between memory devices 109 and printer controller 116 is certified.180
Place, the logic circuit 111 of memory devices 109 perform requested read or write.Established session key is used to every
Repetition methods 170 are asked in a other reading or writing, until communication session terminates.Communication session can be by printer controller 116
Terminate or terminate because of the power down of print system 104 and/or replaceable printer unit 108.
At 178, if the first MAC is not matched with the 2nd MAC, the session keys of memory devices 109 not with printing
The session key matching of system 104.Therefore, the communication between memory devices 109 and printer controller 116 is not authenticated.
At 182, requested read or write is abandoned or refused to the logic circuit 111 of memory devices 109.At 184, memory
The logic circuit 111 of equipment 109 is by its session key labeled as invalid so that it cannot be used again.
Embodiment provides the print system that can wherein install replaceable printer unit.Print system embodiment includes
The memory devices of the one or more privacy keys of storage.It is real with print system that replaceable printer unit embodiment includes storage
Apply the memory of the relevant one or more privacy keys of the one or more privacy key stored in the memory devices of example
Equipment.One or more privacy keys for storing are used for pair in print system embodiment and in replaceable printer unit embodiment
Communication between print system embodiment and replaceable printer unit embodiment is authenticated.
Although being illustrated and described herein specific embodiment, those of ordinary skill in the art are not it will be recognized that
On the premise of deviateing the scope of the present invention, a variety of alternatives and/or equivalent implementation can substitute shown or described specific
Embodiment.This application is intended to cover any adaptation of specific embodiment discussed here or change.Therefore, this invention is intended to only by
Claim and its equivalent limit.
Claims (12)
1. a kind of print system for being used to accommodate replaceable printer unit, the print system include：
Printer controller；
First memory equipment, it includes logic circuit and nonvolatile memory and stores the first secret；And
Communication link, it is configured as can by described in when the replaceable printer unit is installed in the print system
Replace printer unit and be otherwise communicatively linked to the printer controller, wherein the replaceable printer unit and described beating
The communication printed between machine controller occurs in separated session, and each session has the different meetings from the corresponding foundation of the session
Talk about key；
The printer controller of wherein described print system is programmed by the way that session key identifier is delivered to first memory
The logic circuit of equipment carrys out queued session key, and first based on the session key identifier and from the logic circuit is secret
Contiguity receives session key, and exchanges message authentication code with replaceable printer unit to confirm the communication authorized.
2. print system as claimed in claim 1, wherein first secret is deposited from the replaceable printer unit
The secret export of the second of storage.
3. print system as claimed in claim 1, wherein, the print system is programmed to from the replaceable printer portion
Part receives the session key identifier.
4. print system as claimed in claim 3, wherein the print system is programmed to that the session key will be identified
The request of symbol is delivered to the replaceable printer unit.
5. print system as claimed in claim 4, wherein the print system is programmed to recognize using the session key
Demonstrate,prove the communication between the print system and the replaceable printer unit.
6. print system as claimed in claim 1, wherein the printer controller is programmed to use Encryption Algorithm and institute
Session key is stated to calculate first message authentication code（MAC）, the first message authentication code（MAC）For replaceable being beaten to described
Print machine component reads or writes request.
7. print system as claimed in claim 6, wherein the printer controller is programmed to the replaceable printing
Machine component reads or writes request described in sending, and described read or write asks to include the first MAC.
8. print system as claimed in claim 7, wherein the replaceable printer unit is programmed to use the encryption
Algorithm and the session key calculate the 2nd MAC, wherein, the replaceable printer unit will be only described first and second
MAC matching when perform described in read or write request.
9. print system as claimed in claim 8, if wherein first and second MAC is mismatched, it is described replaceable to beat
Print machine component is by the session key labeled as invalid.
10. a kind of method to being operated for accommodating the print system of replaceable printer unit, the print system bag
The secret first memory equipment of storage first is included, wherein the replaceable printer unit and the printer of the print system
Communication between controller occurs in separated session, and different sessions of each session with foundation corresponding with the session are close
Key, this method include：
Using the printer controller of the print system, it is close to correspond to component session from the replaceable printer unit request
The session key identifier of key, the component session key are secret based on second associated with the replaceable printer unit
It is close,
Wherein when the replaceable printer unit is installed in the print system, using be configured to will be described replaceable
Printer unit is otherwise communicatively linked to the communication link of the printer controller to perform the request；
Using the printer controller of the print system, requested session key is received from the replaceable printer module
Identifier；
Using the printer controller of the print system, set by the way that the session key identifier is passed to first memory
Standby logic circuit carrys out queued session key,
Using the printer controller of the print system, received from the logic circuit of the first memory equipment based on described
Session key identifier and the first secret session key；And
Carry out the communication between print system described in certification and the replaceable printer unit using the session key, including with
The replaceable printer unit exchanges message authentication code to confirm the communication authorized.
11. method as claimed in claim 10, wherein described first is secret from the described second secret export.
12. method as claimed in claim 10, wherein the session key be based on described first it is secret and from it is described can be more
Change the session key identifier that printer unit receives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293730.5A CN104077537B (en) | 2008-05-29 | 2008-05-29 | Offer communicates with the certification of replaceable printer unit |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293730.5A CN104077537B (en) | 2008-05-29 | 2008-05-29 | Offer communicates with the certification of replaceable printer unit |
| CN2008801305724A CN102112977A (en) | 2008-05-29 | 2008-05-29 | Providing authenticated communications to replaceable printer component |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008801305724A Division CN102112977A (en) | 2008-05-29 | 2008-05-29 | Providing authenticated communications to replaceable printer component |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104077537A CN104077537A (en) | 2014-10-01 |
| CN104077537B true CN104077537B (en) | 2018-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410293730.5A Active CN104077537B (en) | 2008-05-29 | 2008-05-29 | Offer communicates with the certification of replaceable printer unit |
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| Country | Link |
|---|---|
| CN (1) | CN104077537B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10810319B2 (en) * | 2016-06-25 | 2020-10-20 | Hewlett-Packard Development Company, L.P. | Secure release of print jobs in printing devices |
| EP3688638B1 (en) * | 2018-12-03 | 2023-01-04 | Hewlett-Packard Development Company, L.P. | Logic circuitry package |
| US20230109232A1 (en) * | 2020-04-30 | 2023-04-06 | Hewlett-Packard Development Company, L.P. | Logic circuitry package for print apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1996837A (en) * | 2006-01-05 | 2007-07-11 | 恩益禧电子股份有限公司 | Microcontroller and authentication method between the controllers |
| US7246098B1 (en) * | 1997-07-15 | 2007-07-17 | Silverbrook Research Pty Ltd | Consumable authentication protocol and system |
| US7327846B1 (en) * | 2000-09-05 | 2008-02-05 | Chung Nan Chang | Secure cryptographic key exchange and verifiable digital signature |
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2008
- 2008-05-29 CN CN201410293730.5A patent/CN104077537B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7246098B1 (en) * | 1997-07-15 | 2007-07-17 | Silverbrook Research Pty Ltd | Consumable authentication protocol and system |
| US7327846B1 (en) * | 2000-09-05 | 2008-02-05 | Chung Nan Chang | Secure cryptographic key exchange and verifiable digital signature |
| CN1996837A (en) * | 2006-01-05 | 2007-07-11 | 恩益禧电子股份有限公司 | Microcontroller and authentication method between the controllers |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104077537A (en) | 2014-10-01 |
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