CN106301774B - Safety chip, its encryption key generation method and encryption method - Google Patents
Safety chip, its encryption key generation method and encryption method Download PDFInfo
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Abstract
The present invention provides a kind of safety chip, including primary processor, outer memory module and encryption/decryption module, and the encryption/decryption module includes algoritic module, storage inside module and control module.Dedicated encryption/decryption module is arranged by portion in the chip to manage key and enciphering and deciphering algorithm in the present invention.The encryption/decryption module has hardware random number, by generating unique root key of the random number as chip in production process, is stored in individual storage region, which can only be used by encryption/decryption module, and primary processor can not read the root key.The encryption key generation method and encryption method of safety chip provided by the invention, it requires when subsequent applications generate key using encryption/decryption module, and there is root key to carry out encryption storage to the key of generation automatically, guarantee that the data of every terminal can only be read by the terminal, substantially increases the safety of terminal.
Description
Technical field
The present invention relates to field secure communications more particularly to a kind of safety chip, its encryption key generation method and
Encryption method.
Background technique
The personal secrets short slab that current apple and Samsung are spilt cruelly, it is potential for domestic encryption mobile phone open one
Market, time safety also become home-made cellphone manufacturer and are trimly laid out the emphasis that scheme becomes, and become the characteristic of home-made cellphone.It is specific next
It says and relates generally to two aspects: first is that the information security issue spilt cruelly with Android system being weighed by people more
Depending on；Second is that being based on national security and network security, individual city requirement officials all use domestic brand smart phone instead, this meaning
Future have more units and be added to mobile phone safe ranks.After issuing safe mobile phone strategy one after another from foreign vendor, domestic hand
Machine manufacturer turns to promote security level one after another, turns to safe Encryption market.This information security for being primarily due to smart phone is got over
To get over the extensive concern by user and industry.
The key of present safe mobile phone strategy is encryption technology, and there are mainly two types of forms for the implementation of encryption technology:
Software cryptography and hardware encryption.Software cryptography is primarily directed to application layer, and password storage is in application space, and Encryption Algorithm is by software
It realizes, software cryptography is easier to dispose, independent of specific hardware.Hardware encryption depends primarily on hardware algorithm acceleration
Device, key can store in the eFuse of external memory space or chip, and encryption efficiency is relatively high, and the hardware that needs to rely on is flat
Platform.
The protection for having its source in password of encryption will cause an immeasurable loss if password is revealed.Commercial at present
Ciphering terminal key can be customized by users or generate key plain by hardware random number and is stored in piece or chip external memory, such as
Fruit terminal can easily get key by root, Malware.Therefore, the safety of the key of existing encryption technology is not still
The phenomenon that enough height, Malware steals user key, happens occasionally.
Summary of the invention
In order to solve the problems existing in the prior art, the present invention provides a kind of safety chip, including primary processor, external storage
Module and encryption/decryption module；The encryption/decryption module includes:
Algoritic module, to generate the initial key for being encrypted to data according to Encryption Algorithm；
Storage inside module, includes root key, and the storage inside module is only capable of controlled molding block access；
Control module, it is raw for calling the root key to the algoritic module to encrypt to the initial key
At encryption key and it is stored in the outer memory module；The control module is also used to call the root key to the calculation
Method module is reduced to the initial key so that the encryption key in the outer memory module to be decrypted.
Optionally, only to described in the step of initial key includes public key and private key, encrypts to the initial key
Private key is encrypted, the step of to the encryption key decryption in only the private key is decrypted.
Optionally, the algoritic module includes RSA module, generates the initial key by the RSA module.
Optionally, the algoritic module includes AES module, for being added according to the root key to the initial key
It is close.
Optionally, the safety chip further includes random number generation module, for generating random number using close as described
Key.
Optionally, the control module includes status register, for close by init state mark expression described
Key has generated.
The present invention also provides a kind of encryption key generation methods of safety chip, comprising the following steps:
Primary processor sends encryption key and generates request to encryption/decryption module；
Control module calls algoritic module, and the algoritic module generates initial key；
Control module transmits root key to the algoritic module, and the algoritic module encrypts the initial key, generates
Encryption key is simultaneously stored in the outer memory module.
Optionally, the encryption key is stored in the outer memory module by the control module.
The present invention also provides a kind of encryption methods of safety chip, including
Carry out above-mentioned encryption key generation step；
Primary processor sends CIPHERING REQUEST and be-encrypted data to encryption/decryption module；
Control module calls algoritic module；
The algoritic module reads the encryption key in the root key and the outer memory module, close to the encryption
Key is decrypted, and restores the initial key；And
Algoritic module encrypts data using initial key.
Optionally, the algoritic module includes HASH module, for calculating message digest to the data of encryption, and is added to
The information heading of the encryption data.
The present invention provides a kind of safety chip, including primary processor, outer memory module and encryption/decryption module, by core
Dedicated encryption/decryption module is set inside piece, manages key and enciphering and deciphering algorithm.The encryption/decryption module simultaneously has hardware random number,
By generating unique root key of the random number as chip in production process, it is stored in individual storage region, the root key is only
It can be used by encryption/decryption module, primary processor can not read the root key.And subsequent applications generate key require using add solution
Close module, and there is root key to carry out encryption storage to the key of generation (or private key of asymmetric arithmetic) automatically, guarantee every portion
The data of terminal can only be read by the terminal, substantially increase the safety of terminal.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of safety chip described in one embodiment of the invention.
Fig. 2 is the encryption key generation method schematic diagram of the safety chip structure in conjunction with described in one embodiment of the invention.
Fig. 3 is the encryption method schematic diagram of the safety chip structure in conjunction with described in one embodiment of the invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It is wanted according to following explanation and right
Book is sought, advantages and features of the invention will become apparent from.It should be noted that attached drawing is all made of very simplified form and using non-
Accurately ratio, only for the purpose of facilitating and clarifying the purpose of the embodiments of the invention.
As shown in Figure 1, safety chip of the present invention includes primary processor 100, outer memory module 200 and encryption and decryption
Module 300；The encryption/decryption module 300 includes:
Algoritic module 320, to generate the initial key for being encrypted to data according to Encryption Algorithm；
Storage inside module 330, includes root key, and storage inside module 330 is only capable of being accessed by control module 310；
Control module 310, for calling the root key to the algoritic module 320 to add to the initial key
It is close, it generates encryption key and is stored in 200 in the outer memory module；The control module 310 is also used to call described
Key, the encryption key in the outer memory module 200 to be decrypted, is reduced to described first to the algoritic module 320
Beginning key.
Wherein, may exist a variety of specific Encryption Algorithm, such as RSA module 322 in algoritic module 320, by described
RSA module 322 generates the initial key.At this point, the initial key that RSA module 322 generates is key pair, including public key and private
Key only encrypts the private key in the step of encrypting to the initial key, the step of to the encryption key decryption in
Only the private key is decrypted.
Algoritic module 320 for example also includes AES module 325, for being carried out according to the root key to the initial key
Encryption, to generate encryption key.As previously mentioned, in the present embodiment, in the step of initial key encrypts only to the private key into
Row encryption.
When safety chip production of the invention, that is, will do it the initialization process of encryption/decryption module 300 to generate on
The root key stated simultaneously is stored among storage inside module 330.Wherein, the control module 310 includes status register, is used for
Indicate that the root key has been formed and stored among storage inside module 330 by init state mark；Control module
310 further include random number generation module (RNG module 321), for generating random number using as the root key.
The specific initialization step of encryption/decryption module 300 is as follows:
(1) primary processor 100 sends to encryption/decryption module 300 and instructs, and reads the status register of control module 310
(state_register) whether inquiry encryption/decryption module 300 is initialized, enters (4) if initialization is completed, no
Then enter (2)；
(2) encryption and decryption control module triggers RNG module 321, generates unique root of the random number of specified digit as chip
Key (RootKey), is stored in storage inside module 330, and storage inside module 330 can only be accessed by control module 310.
(3) write state register (state_register) init state identifies, which can only be written once.
(4) returning to initialization to primary processor 310 terminates mark, terminates.
The present invention also provides the encryption key generation methods of above-mentioned safety chip, including
Primary processor 100 sends encryption key and generates request to encryption/decryption module 300；
Control module 310 calls algoritic module 320, and the algoritic module 320 is made to generate initial key；
Control module 310 transmits root key to the algoritic module 320, and algoritic module 320 encrypts the initial key,
It generates encryption key and is stored among the outer memory module 200.
Wherein, above-mentioned encryption key is stored in the outer memory module 200 by the control module 310.
When safety chip is applied among specific electronic equipment such as mobile phone, it is controlled by the application program of mobile phone.
The encryption key generation method of safety chip is described in detail with an embodiment below, in conjunction with the arrow direction in Fig. 2, encrypts close
The step of key generation method includes:
(1) application program sends the order that request generates key, and setting generates the type of key and is stored in piece or piece
Outer parameter；
(2) driver generates request instruction according to the encryption key of application program and is packaged data, passes through main place
Reason device 100 is sent to encryption and decryption control module 200；
(3) control module 310 receives request instruction, parses to instruction, judges the format calling pair for requesting key
The algoritic module answered, such as RSA key pair then call RSA module 322；
(4) RSA module 322 generates key pair: public key (public_key) and private key (private_kes), by key pair
Return to control module 310
(5) control module 310 receives key pair, calls AES module 325, and close from the reading root of storage inside module 330
Key (root_key) passes to AES module 325, by AES module 325 using root key (root_key) to private key (private_
Key it) is encrypted, encrypted key is returned into control module 310.
(6) private key after the public key of generation and encryption is stored in outer memory module 200 by control module 310, and to main place
It manages device 100 and returns to request results, notice primary processor 100 reads public key and encrypted private key.
The present invention also provides a kind of encryption methods of above-mentioned safety chip, including
First carry out above-mentioned encryption key generation step；
Later, primary processor 100 sends CIPHERING REQUEST and be-encrypted data to encryption/decryption module 300；
Control module 310 calls algoritic module 320；
The algoritic module 320 reads the encryption key in the root key and the outer memory module 200, to described
Encryption key is decrypted, and restores the initial key；
Algoritic module 320 encrypts data using initial key.
The algoritic module 320 includes HASH module 323 at this time, for calculating message digest to the data of encryption, and is added
It is added to the information heading of the encryption data.
The encryption method of safety chip is described in detail with an embodiment below, in conjunction with the arrow direction in Fig. 3, encryption side
The specific steps of method include:
(1) application program sends the CIPHERING REQUEST to data (file)；
(2) driver receives request and is packaged data, sends control for CIPHERING REQUEST by primary processor 100
Module 310；
(3) control module 310 parses CIPHERING REQUEST, receives the encryption key and data (file) information of aforementioned generation；
(4) AES module 325 is called, and reads the root key (root_key) of storage inside module 330, it is close to receiving
Key is decrypted, and restores the private key (private_key) of generation
(5) RSA module 322 is called, data (file) are encrypted using the private key (private_key) of reduction, it is raw
At ciphered data information, guarantee the confidentiality of data；
(6) HASH module 323 is called, message digest is calculated to data (file) according to solicited message, is added to encryption number
According to information heading, guarantee the integrality of data.
(7) to 100 returned data encrypted result of primary processor.
The invention designs a kind of security mechanism by improving existing chip, and chip interior has dedicated encryption and decryption mould
Block manages key and enciphering and deciphering algorithm.The encryption/decryption module simultaneously has hardware random number, by generating random number in production process
As unique root key of chip, it is stored in individual storage region, which can only be used by encryption/decryption module, main process task
Device can not read the root key.And subsequent applications generate key and require using encryption/decryption module, and have root key automatically to life
At key (or private key of asymmetric arithmetic) carry out encryption storage, guarantee that the data of every terminal can only be read by the terminal
It takes, substantially increases the safety of terminal.
Core of the invention is that key and Encryption Algorithm are managed collectively by dedicated encryption/decryption module, and every chips have unique
Root key, the key of generation all carries out encryption storage by the root key, guarantees the confidentiality of key.Simultaneously using automatic encryption
Technical protection key, prevents malware attacks；Meanwhile data encryption and calculating message digest are all added dedicated in the present invention
It is complete inside deciphering module, strengthen the safety of data.
The comparison of the encryption policy of safety chip of the invention and existing encryption policy is as follows:
In conclusion by dedicated encryption/decryption module management key and being added using the encryption method of safety chip of the invention
Close algorithm can greatly improve the safety of key, can prevent Malware from stealing user key.
Obviously, those skilled in the art can carry out various modification and variations without departing from spirit of the invention to invention
And range.If in this way, these modifications and changes of the present invention belong to the claims in the present invention and its equivalent technologies range it
Interior, then the invention is also intended to include including these modification and variations.
Claims (10)
1. a kind of safety chip, which is characterized in that including primary processor, outer memory module and encryption/decryption module；Described plus solution
Close module includes:
Algoritic module, to generate the initial key for being encrypted to data according to Encryption Algorithm；
Storage inside module, includes root key, and the storage inside module is only capable of controlled molding block access；
Control module generates and adds for calling the root key to the algoritic module to encrypt to the initial key
Key is simultaneously stored in the outer memory module；The control module is also used to call the root key to the algorithm mould
Block is reduced to the initial key so that the encryption key in the outer memory module to be decrypted.
2. safety chip as described in claim 1, which is characterized in that the initial key includes public key and private key, to described
Only the private key is encrypted in the step of initial key encrypts, the step of to the encryption key decryption in only to the private
Key is decrypted.
3. safety chip as described in claim 1, which is characterized in that the algoritic module includes RSA module, by described
RSA module generates the initial key.
4. safety chip as described in claim 1, which is characterized in that the algoritic module includes AES module, for according to institute
Root key is stated to encrypt the initial key.
5. safety chip as described in claim 1, which is characterized in that it further include random number generation module, it is random for generating
Number is using as the root key.
6. safety chip as described in claim 1, which is characterized in that the control module includes status register, for leading to
Crossing init state mark indicates that the root key has generated.
7. a kind of encryption key generation method of safety chip as claimed in any one of claims 1 to 6, which is characterized in that packet
It includes
Primary processor sends encryption key and generates request to encryption/decryption module；
Control module calls algoritic module, and the algoritic module generates initial key；
Control module transmits root key to the algoritic module, and the algoritic module encrypts the initial key, generates encryption
Key is simultaneously stored in the outer memory module.
8. the encryption key generation method of safety chip as claimed in claim 7, which is characterized in that the encryption key passes through
The control module is stored in the outer memory module.
9. a kind of encryption method of safety chip, which is characterized in that including
Carry out the encryption key generation step as described in claim 7-8 any one；
Primary processor sends CIPHERING REQUEST and be-encrypted data to encryption/decryption module；
Control module calls algoritic module；
The algoritic module reads the encryption key in the root key and the outer memory module, to the encryption key into
Row decryption, restores the initial key；And
Algoritic module encrypts data using initial key.
10. the encryption method of safety chip as claimed in claim 9, which is characterized in that the algoritic module includes HASH mould
Block for calculating message digest to the data of encryption, and is added to the information heading of the encryption data.
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| CN201510288423.2A CN106301774B (en) | 2015-05-29 | 2015-05-29 | Safety chip, its encryption key generation method and encryption method |
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| CN201510288423.2A CN106301774B (en) | 2015-05-29 | 2015-05-29 | Safety chip, its encryption key generation method and encryption method |
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| CN105681032B (en) * | 2016-01-08 | 2017-09-12 | 腾讯科技（深圳）有限公司 | Method for storing cipher key, key management method and device |
| CN107070881B (en) * | 2017-02-20 | 2020-11-27 | 北京古盘创世科技发展有限公司 | Key management method, system and user terminal |
| CN107292199A (en) * | 2017-05-24 | 2017-10-24 | 上海泰金电子科技有限公司 | A kind of doorway machine safety system |
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| CN107743062A (en) * | 2017-08-29 | 2018-02-27 | 苏州惠邦科信息技术有限公司 | Mobile phone safe encryption chip |
| CN108322303A (en) * | 2017-12-07 | 2018-07-24 | 上海西默通信技术有限公司 | A kind of data transmission method |
| CN108880791A (en) * | 2018-05-30 | 2018-11-23 | 招商银行股份有限公司 | Cryptographic key protection method, terminal and computer readable storage medium |
| CN109145613A (en) * | 2018-07-10 | 2019-01-04 | 杨俊佳 | Security encryption chip and electronic equipment containing the chip |
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| CN109697173B (en) * | 2018-12-11 | 2023-05-23 | 中国航空工业集团公司西安航空计算技术研究所 | Information security-oriented embedded computer SiP module design method and circuit |
| CN109672521B (en) * | 2018-12-26 | 2022-11-29 | 贵州华芯通半导体技术有限公司 | Security storage system and method based on national encryption engine |
| CN109768862B (en) * | 2019-03-12 | 2019-11-22 | 北京深思数盾科技股份有限公司 | A kind of key management method, key call method and cipher machine |
| CN109995532A (en) * | 2019-04-11 | 2019-07-09 | 晏福平 | A kind of online management method and system of terminal master key |
| CN110138556A (en) * | 2019-05-28 | 2019-08-16 | 上海兆芯集成电路有限公司 | Data processing equipment and data processing method |
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| CN110166236B (en) * | 2019-05-31 | 2022-01-18 | 北京中金国信科技有限公司 | Key processing method, device and system and electronic equipment |
| CN110837649A (en) * | 2019-10-23 | 2020-02-25 | 特瓦特能源科技有限公司 | Data encryption method and system |
| CN112149176A (en) * | 2020-07-01 | 2020-12-29 | 南京中新赛克科技有限责任公司 | Key access system and method based on EEPROM |
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Application publication date: 20170104 Assignee: Shanghai Li Ke Semiconductor Technology Co.,Ltd. Assignor: LEADCORE TECHNOLOGY Co.,Ltd. Contract record no.: 2018990000159 Denomination of invention: Security chip, encryption secret key generation method thereof and encryption method License type: Common License Record date: 20180615 |
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Effective date of registration: 20221123 Address after: 201206 Shanghai Pudong New Area free trade pilot area 1258 moon 3 building fourth floor A406 room Patentee after: Chen core technology Co.,Ltd. Patentee after: Chenxin Technology Co.,Ltd. Address before: 201206 Pudong New Area, Shanghai, China (Shanghai) free trade pilot area, 1258 A406 3 fourth story room. Patentee before: Chen core technology Co.,Ltd. Patentee before: DATANG SEMICONDUCTOR DESIGN Co.,Ltd. |
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Address after: 201206 Shanghai Pudong New Area free trade pilot area 1258 moon 3 building fourth floor A406 room Patentee after: Chen core technology Co.,Ltd. Patentee after: Chenxin Technology Co.,Ltd. Address before: 201206 Shanghai Pudong New Area free trade pilot area 1258 moon 3 building fourth floor A406 room Patentee before: Chen core technology Co.,Ltd. Patentee before: Chenxin Technology Co.,Ltd. |
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Effective date of registration: 20241021 Address after: Room 102, Building 16, No. 1699, the Pearl River Road, Huangdao District, Qingdao, Shandong 266499 Patentee after: Chenxin Technology Co.,Ltd. Country or region after: China Address before: 201206 Shanghai Pudong New Area free trade pilot area 1258 moon 3 building fourth floor A406 room Patentee before: Chen core technology Co.,Ltd. Country or region before: China Patentee before: Chenxin Technology Co.,Ltd. |