CN2609286Y - Fast key-replacing cipher chip - Google Patents
Fast key-replacing cipher chip Download PDFInfo
- Publication number
- CN2609286Y CN2609286Y CNU022451382U CN02245138U CN2609286Y CN 2609286 Y CN2609286 Y CN 2609286Y CN U022451382 U CNU022451382 U CN U022451382U CN 02245138 U CN02245138 U CN 02245138U CN 2609286 Y CN2609286 Y CN 2609286Y
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- key
- memory
- crypto
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- follower
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Abstract
The utility model discloses a crypto chip which can quickly changed the key, a plurality of stages of series-wound code round functional operation modules are arranged between the data input end and the deciphering result output end, each code round functional operation module are connected in series with a work crypto key memory with the crypto key data, which is characterized in that each stage of the work crypto key memory is respectively connected with the memory read addresses A and B through the connecting choosing follower, each stage of choosing follower is controlled by the algorithm stage control circuit, the key changing orders respectively control each stage of the memory read addresses B through the circuit ; the utility model has advantages of quick speed of changing the crypto key, can momentarily change, and can have the enciphering and deciphering operation in the pipeline.
Description
Technical field
The utility model relates to a kind of crypto chip, particularly relates to a kind of crypto chip that can change key fast.
Background technology
Generally adopt the multistage operations pattern of password wheels function algorithm module serial connection at present in the block cipher chip.When multi-group data participates in computing simultaneously, owing to can not influence the encryption and decryption computing of last group of data, after the group data are finished the encryption and decryption computing before must waiting for, carry out key again and change, so this crypto chip changes, and key speed is slow, the operation of incompatibility streamline encryption and decryption.
Summary of the invention
Goal of the invention of the present utility model is: overcome the outstanding shortcoming that the key speed of changing that the existing password chip exists is slow, be unsuitable for pile line operation, provide a kind of and can change key at any time fast, be suitable for a kind of fast quick change key crypto chip of pile line operation.
Goal of the invention of the present utility model realizes by implementing following technical proposals:
A kind of crypto chip of fast quick change key, the password wheels functional operation module of multi-stage serial connection is set between output as a result in data input pin and encryption and decryption, every grade of password wheels function algorithm module, all be serially connected with the working key memory that has key data, it is characterized in that: every level work crypto key memory all passes through the selection follower that connected, be connected with B with memory read address A respectively, selection followers at different levels are changed the key order and are connected control memory reads at different levels address B respectively by circuit by the control of algorithm level control circuit.
Advantage of the present utility model is: because in crypto chip, each level work crypto key memory all passes through to select follower, be connected with B with memory read address A respectively, can send to memory read address B at any time as required and change the key order, select follower according to the new cipher key address of changing of memory read address B, from the corresponding work key, the output new key is given this grade password wheels functional operation module in the memory, uses for the password wheels functional operation.Thereby this crypto chip have change key speed fast, can change key at any time and can on streamline, carry out outstanding advantage such as encryption and decryption computing.
Description of drawings
Fig. 1 is the utility model crypto chip structure working principle block diagram.
Embodiment
A kind of fast quick change key crypto chip with level Four password wheels functional operation module, in chip data input and encryption and decryption as a result between output, be provided with the password wheels functional operation module of level Four series connection, every grade of password wheels function algorithm module, all be serially connected with the working key memory that has key data, every level work crypto key memory all passes through the selection follower that connected, be connected with B with memory read address A respectively, selection followers at different levels are changed the key order and are controlled memory reads at different levels address B respectively by circuit by the control of algorithm level control circuit; Before key was changed, it is consistent with B that all crypto key memorys are read address A, and according to address A, the key data that the output of working key memory is corresponding uses for each round function computing module of cryptographic algorithm.When key is changed, change the key command signal and produce a pulse, B changes the new key address into the memory read address.When the input data are carried out first order computing in first order computing module, the control of algorithm level control circuit selects follower to make memory read address B output, working key memory 1 is exported new key to password wheels function 1 computing module, carrying out round function 1 computing uses, other address is constant, when carrying out second level computing, selection follower in the algorithm level control circuit control second level, selection is read memory 2 and is read address B output, make the new key of working key memory 2 outputs to the computing module of the second level, carry out round function 2 encryption and decryption computings, other address is constant, and the like, finish all computings up to computing module, at this moment, old cipher key address is out of use, new key memory read address B covers old cipher key address A, finishes a secondary key and changes.Any moment sends memory read address B and changes the key order, all can realize password wheels functional operation module is changed key.
Claims (1)
1, a kind of crypto chip of fast quick change key, in data input pin and encryption and decryption as a result between output, the password wheels functional operation module of multi-stage serial connection is set, every grade of password wheels function algorithm module, all be serially connected with the working key memory that has key data, it is characterized in that: every level work crypto key memory all passes through the selection follower that connected, be connected with B with memory read address A respectively, selection followers at different levels are changed the key order and are controlled memory reads at different levels address B respectively by circuit by the control of algorithm level control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU022451382U CN2609286Y (en) | 2002-12-16 | 2002-12-16 | Fast key-replacing cipher chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU022451382U CN2609286Y (en) | 2002-12-16 | 2002-12-16 | Fast key-replacing cipher chip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2609286Y true CN2609286Y (en) | 2004-03-31 |
Family
ID=34149243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU022451382U Expired - Lifetime CN2609286Y (en) | 2002-12-16 | 2002-12-16 | Fast key-replacing cipher chip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2609286Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897517B (en) * | 2005-07-13 | 2011-04-06 | 瑞萨电子株式会社 | Encrypt and decrypt circuit |
-
2002
- 2002-12-16 CN CNU022451382U patent/CN2609286Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897517B (en) * | 2005-07-13 | 2011-04-06 | 瑞萨电子株式会社 | Encrypt and decrypt circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHENGDU SANLINGJIA MICROELECTRONICS CO., LTD. Free format text: FORMER OWNER: NO.30 INST., CHINA ELECTRONIC SCI. + TECH. GROUP CO. Effective date: 20080829 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080829 Address after: No. 6, Pioneer Road, hi tech Zone, Sichuan, Chengdu: 610041 Patentee after: Chengdu Sanlingjia Microelectronic Co., Ltd. Address before: No. 6, Pioneer Road, hi tech Zone, Sichuan, Chengdu: 610041 Patentee before: No.30 Inst., China Electronic Science & Technology Group Corp. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121216 Granted publication date: 20040331 |