CN204215405U - A kind of encryption solid state memory disc - Google Patents
A kind of encryption solid state memory disc Download PDFInfo
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- CN204215405U CN204215405U CN201420546617.9U CN201420546617U CN204215405U CN 204215405 U CN204215405 U CN 204215405U CN 201420546617 U CN201420546617 U CN 201420546617U CN 204215405 U CN204215405 U CN 204215405U
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Abstract
The utility model provides a kind of encryption solid state memory disc, and this dish has the function of authentication and data encryption, comprises communication interface, data encrypting and deciphering control module, authentication and key management module, identity input media and solid storage medium; Described data encrypting and deciphering control module is connected with solid storage medium with described communication interface, authentication and key management module, data stored in time, described data encrypting and deciphering control module obtains data from communication interface and stored in solid storage medium after being encrypted according to these data of encryption and decryption double secret key obtained from authentication and key management module; When reading data, described data encrypting and deciphering control module obtains data from solid storage medium and sends to communication interface according to after this decrypt data of encryption and decryption double secret key obtained from authentication and key management module.Adopt the technical solution of the utility model, the safe class of data encryption in significant increase encryption solid state memory disc.
Description
Technical field
The utility model relates to data and stores and data security arts, particularly one encryption solid state memory disc.
Background technology
All the time, the data security of Computer Memory Unit (memory disc) receives much concern, and market is also proposed the various memory disc with encryption function successively, such as cryptographic storage card, encrypted U disk, encipher hard disc etc.
For encryption system, a link of key management to be the weakest be also most critical, the leakage of key will directly cause the leakage of data.Key management comprises the basic links such as the generation of key, storage, transmission and protection, and the cost that the method stealing the decoding of secret ratio from key management will spend is much smaller, so to the management of key with protect especially important.
At present, there is following technical matters at key (K) management aspect of data encryption in the cryptographic storage dish in market:
(1) key (K) and encryption/decryption module one, make key management perform practically no function;
(2) data of key (K) with encryption are stored together, result in the dangerous of key;
(3) key (K) unencryption stores, and key is easily maliciously cracked;
(4) in the communication transfer of key, also lack effective secrecy provision, thus make key present pellucidity in transmission channel, be vulnerable to detecting and crack.
In a word, due to key management and secret in existing problems, cause the safe class of cryptographic storage dish to reduce, be difficult to the market demand of satisfied more high safety grade.
Therefore, for the above-mentioned defect existed in currently available technology, be necessary to study in fact, to provide a kind of scheme, solve the defect existed in prior art, a kind of encryption solid state memory disc of high safety grade is provided.
Utility model content
In order to overcome the defect of above-mentioned prior art, the utility model provides a kind of encryption solid state memory disc data encryption be separated with key management, thus the security performance of greatly high encryption solid state memory disc.
For solving prior art Problems existing, the technical solution of the utility model is:
A kind of encryption solid state memory disc, this dish has the function of authentication and data encryption, comprises communication interface, data encrypting and deciphering control module, authentication and key management module, identity input media and solid storage medium;
Described communication interface is connected with outer computer, for carrying out data communication with outer computer;
Described identity input media is for gathering the identity information of user's input;
The identity information that described authentication and key management module gather for receiving described identity input media, carry out authentication with the subscriber identity information prestored within it, and authentication by after send to described data encrypting and deciphering control module by storing encryption and decryption key within it;
Described solid storage medium is for storing the data after encryption;
Described data encrypting and deciphering control module is connected with solid storage medium with described communication interface, authentication and key management module, data stored in time, described data encrypting and deciphering control module obtains data from communication interface and stored in solid storage medium after being encrypted according to these data of encryption and decryption double secret key obtained from authentication and key management module;
When reading data, described data encrypting and deciphering control module obtains data from solid storage medium and sends to communication interface according to after this decrypt data of encryption and decryption double secret key obtained from authentication and key management module.
Preferably, described data encrypting and deciphering control module comprises control module, data buffer, communication interface, encryption and decryption hardware module and key cache device, wherein,
Described communication interface is used for carrying out data communication with authentication and key management module, receives the encryption and decryption key that described key management module sends;
Described control module is connected with key cache device with described data buffer, communication interface, encryption and decryption hardware module, for the operation in control data encryption and decryption control module between modules;
Described encryption and decryption hardware module is used for carrying out encryption and decryption operation to data;
Described data buffer is used for data cached information;
Described key cache device is volatile storage, for storing encryption and decryption key.
Preferably, described authentication and key management module comprise communication interface, data buffer, processor, tandom number generator, authentication module and non-volatile memory medium, wherein,
Described communication interface is used for carrying out data communication with data encrypting and deciphering control module, and encryption and decryption key is sent to described data encrypting and deciphering control module;
Described data buffer is used for data cached information;
Described non-volatile memory medium comprises key storage district and identity information memory block, and described key storage district is for storing encryption and decryption key; Described identity information memory block is for storing subscriber identity information;
The identity information that described authentication module gathers for receiving identity input media, carries out authentication with the identity information be stored in described non-volatile memory medium;
Described processor is connected with authentication module with described data buffer, non-volatile memory medium, tandom number generator, for the transmission of encryption and decryption key according to the output control of described authentication module;
Described tandom number generator is used for a string character of random generation;
Described encryption and decryption key is for being produced at random by described tandom number generator during first use and being stored in described key storage district.
Preferably, described authentication and key management module also comprise encrypting module, and described encrypting module is connected with processor, are stored in described non-volatile memory medium after encryption and decryption key and subscriber identity information being encrypted again.
Preferably, described authentication and key management module also comprise randomization module, described randomization module is connected with data buffer with processor, tandom number generator, sends to data encrypting and deciphering control module again after encryption and decryption key is carried out randomized algorithm process by the random character for producing according to described tandom number generator.
Preferably, described data encrypting and deciphering control module also comprises anti-randomized processing module, described anti-randomized processing module is connected with control module, after the data received from described authentication and key management module are carried out anti-randomized algorithm process, obtain encryption and decryption key.
Preferably, described communication interface adopts one of following conventional interface: USB, PATA/SATA, SAS, PCIE, SD or MMC.
Preferably, described identity input media is key-press module or biometric sensor; Described biometric sensor is fingerprint sensor or iris sensor.
Preferably, the non-volatility memorizer of described solid storage medium to be semiconductor be stock is any one in flash memory (FLASH), phase transition storage (PRAM), SD or eMMC memory module.
Preferably, described encryption and decryption hardware module is realized by hardware circuit, and its built-in enciphering and deciphering algorithm adopts one of following cryptographic algorithm generally used both at home and abroad: AES, RSA, ECC, DES/3/DES, SHA, GOST, the close algorithm of state or other user-defined enciphering and deciphering algorithms.
Compared with prior art, one encryption solid state memory disc of the present utility model, safeguard measure is implemented: the true random number generated by tandom number generator is as key, and anyone cannot know concrete key information in the production of key, storage, the key link such as transmission and use; In the storage of key (K), preserve again after key being encrypted by the encrypting module of the cryptographic algorithm of built-in high strength, even if chip is maliciously cracked, (such as chip makes physical goes the dyeing of lid, burn into take pictures) also can only obtain the key data after encrypting, and cannot obtain real key; At the transmission link of key, transmit again after key being carried out random number mixing or the process of CBC mode encryption by randomization module, make the key data of transmission channel be random number, the malice such as exhaustive cannot be carried out and crack, effectively ensure that the key safety in transmission channel; In the use link of key, key (K) is temporarily stored in data buffer, and namely power down loses.In a word, adopt the technical solution of the utility model, the safe class of data encryption in significant increase encryption solid state memory disc.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model encryption solid state memory disc;
Fig. 2 is the theory diagram of data encrypting and deciphering control module in Fig. 1;
Fig. 3 is the theory diagram of authentication and key management module in Fig. 1;
Fig. 4 is the theory diagram of authentication and the another kind of embodiment of key management module in Fig. 1;
Fig. 5 is the theory diagram of the another kind of embodiment of data encrypting and deciphering control module in Fig. 1.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
On the contrary, the utility model is contained any by the substituting of making on marrow of the present utility model and scope of defining of claim, amendment, equivalent method and scheme.Further, in order to make the public have a better understanding to the utility model, in hereafter details of the present utility model being described, detailedly describe some specific detail sections.Do not have the description of these detail sections can understand the utility model completely for a person skilled in the art yet.
See Fig. 1, be depicted as the theory diagram of the utility model encryption solid state memory disc, this dish has the function of authentication and data encryption, comprises communication interface (11), data encrypting and deciphering control module (12), authentication and key management module (13), identity input media (14) and solid storage medium (15);
Communication interface (11) is connected with outer computer, for carrying out data communication with outer computer; Receive the data message of outer computer and send to data encrypting and deciphering control module (12), or the data message after data encrypting and deciphering control module (12) process is sent to outer computer.Communication interface (11) selects the interface module of prior art Plays, can adopt one of following conventional interface: USB, PATA/SATA, SAS, PCIE, SD or MMC.
Identity input media (14) is for gathering the identity information of user's input, and it is connected with authentication and key management module (13), and the identity information of collection is sent to authentication and key management module (13).Identity input media (14) is biometric sensor or key-press module.The identity that key-press module can receive from key passwords inputs; Biometric sensor is the sensor such as fingerprint, vocal print from biometric sensor.
The identity information that authentication and key management module (13) gather for receiving described identity input media (14); Prestore the identity information of user within it, this identity information can by user's input when solid state memory disc (1) is encrypted in first configuration; Authentication and key management module (13) are after the identity information obtaining input, authentication is carried out with the subscriber identity information prestored within it, whether the process of authentication is and compares the identity information prestored and mate completely with the identity information that user inputs, if identity information mates, then authentication is passed through, otherwise authentication failure.After authentication is passed through, the encryption and decryption key stored within it is sent to data encrypting and deciphering control module (12) by authentication and key management module (13).
Authentication and the middle encryption and decryption key storing data encrypting and deciphering control module (12) of key management module (13), therefore, when not obtaining encryption and decryption key, data encrypting and deciphering control module (12) normally cannot carry out encryption and decryption operation, and authentication and key management module (13) are only passed through in authentication, just encryption and decryption key is sent to data encrypting and deciphering control module (12).By this technological means, data encryption is separated with key management, greatly improves the safe class of data encryption in encryption solid state memory disc.
Solid storage medium (15) is for storing the data after encryption, solid storage medium (15) is the non-volatility memorizer of stock for semiconductor, is any one in flash memory (FLASH), phase transition storage (PRAM), SD or eMMC memory module.
Data encrypting and deciphering control module (12) is connected with solid storage medium (15) with described communication interface (11), authentication and key management module (13), data stored in time, described data encrypting and deciphering control module (12) obtains data from communication interface (11) and stored in solid storage medium (15) after being encrypted according to these data of encryption and decryption double secret key obtained from authentication and key management module (13);
When reading data, described data encrypting and deciphering control module (12) obtains data from solid storage medium (15) and sends to communication interface (11) according to after this decrypt data of encryption and decryption double secret key obtained from authentication and key management module (13).
See Fig. 2, be depicted as the theory diagram of data encrypting and deciphering control module in Fig. 1, data encrypting and deciphering control module (12) comprises control module (121), data buffer (122), communication interface (123), encryption and decryption hardware module (124) and key cache device (125) further, wherein
Communication interface (123), for carrying out data communication with authentication and key management module (13), is mainly used in receiving the encryption and decryption key that described key management module (13) sends; Communication interface (11) selects the interface module of prior art Plays, can adopt one of following conventional interface: USB, PATA/SATA, SAS, PCIE, SD or MMC.
Control module (121) is connected with key cache device (125) with described data buffer (122), communication interface (123), encryption and decryption hardware module (124), the center that control module (121) is processing data information, the operation between control data encryption and decryption control module (12) interior modules;
Encryption and decryption hardware module (124) for carrying out encryption and decryption operation to data under the control of control module (121), encryption and decryption hardware module (124) is realized by hardware circuit, and its built-in enciphering and deciphering algorithm adopts one of following cryptographic algorithm generally used both at home and abroad: AES, RSA, ECC, DES/3/DES, SHA, GOST, the close algorithm of state or other user-defined enciphering and deciphering algorithms.
Data buffer (122) is for data cached information;
Key cache device (125) is for storing encryption and decryption key, for power down volatile storage, therefore, just preserve key in data encrypting and deciphering algoritic module (11) temporarily, once power down, the key in key cache device (125) will disappear.
See Fig. 3, be depicted as the theory diagram of authentication and key management module in Fig. 1, authentication and key management module (13) comprise communication interface (131), data buffer (132), processor (133), tandom number generator (134), authentication module (135) and non-volatile memory medium (136) further, wherein
Communication interface (131), for carrying out data communication with data encrypting and deciphering control module (12), is mainly used in encryption and decryption key being sent to described data encrypting and deciphering control module (12); Communication interface (131) selects the interface module of prior art Plays, can adopt one of following conventional interface: USB, PATA/SATA, SAS, PCIE, SD or MMC.
Data buffer (132) is for data cached information;
Non-volatile memory medium (136) comprises key storage district (137) and identity information memory block (138), and key storage district (137) are for storing encryption and decryption key; Identity information memory block (138) is for storing subscriber identity information; Non-volatile memory medium (136) is built in authentication and key management module (13), thus encryption and decryption key is separated with solid storage medium (15) interior data message with private informations such as subscriber identity informations, make the storage of the private informations such as encryption and decryption key and subscriber identity information safer.
The identity information that authentication module (135) gathers for receiving identity input media (14), carries out authentication with the identity information be stored in described non-volatile memory medium (136); Under the control of processor (133), the identity information that authentication module (135) obtains user's input and the identity information be stored in non-volatile memory medium (136), and both are carried out information matches, as completely the same in mated, then authentication is passed through, and sends the successful signal of authentication to processor (133).
Processor (133) and described data buffer (132), non-volatile memory medium (136), tandom number generator (134) is connected with authentication module (135), it is the center of data processing and control, control the operation between authentication and key management module (13) interior modules, the transmission of encryption and decryption key according to the output control of described authentication module (135), namely after receiving the successful signal of authentication that authentication module (135) sends, the encryption and decryption key be stored in non-volatile memory medium (136) is sent to data encrypting and deciphering control module (12).
Tandom number generator (134) is for producing a string character at random;
Described encryption and decryption key is for being produced at random by described tandom number generator (134) during first use and being stored in described key storage district (137).The mode being produced true random number by tandom number generator (134) generates key (K), and anyone comprises user all cannot obtain concrete key (K) information, thus further ensures the security of key.
In technique scheme, key (K) unencryption stores, namely be directly stored in non-volatile memory medium (136), if carry out malice to chip to crack (such as chip makes physical goes the dyeing of lid, burn into take pictures), key (K) will be stolen.For solving the problems of the technologies described above, the utility model proposes a kind of preferred implementation.See Fig. 4, be depicted as the theory diagram of authentication and the another kind of embodiment of key management module in Fig. 1, authentication and key management module (13) also comprise encrypting module (137), encrypting module (137) is connected with processor (133), is stored in described non-volatile memory medium (136) after encryption and decryption key and subscriber identity information being encrypted again.Also be namely stored in after encryption and decryption key (K) in non-volatile memory medium (136) and subscriber identity information are all through encrypting module (137) encryption and store again, like this, even if chip is maliciously cracked, (such as chip makes physical goes the dyeing of lid, burn into take pictures) also can only obtain the key data after encrypting, real key cannot be obtained, improve the security of key storage further.
Accordingly, processor (133) sends to data encrypting and deciphering control module (12) after being first decrypted by the encryption and decryption key be stored in non-volatile memory medium (136) again.
In a preferred embodiment, encrypting module (137) adopts SM4 cryptographic algorithm.
In technique scheme, in the communication transfer of key, lack effective secrecy provision, key presents pellucidity in transmission channel, according to the mode of data-signal in detecting transmission channel, still cracks key.In order to solve the problems of the technologies described above, the utility model proposes a kind of preferred implementation, authentication and key management module (13) also comprise randomization module (138), randomization module (138) is connected with data buffer (132) with processor (133), tandom number generator (134), sends to data encrypting and deciphering control module (12) again after encryption and decryption key is carried out randomized algorithm process by the random character for producing according to described tandom number generator (134).The each key delivery of tandom number generator (134) all produces different random characters (RN), the built-in specific algorithm of randomization module (138), under the control of processor (133), after random character (RN) and key (K) are mixed formation privacy key (SK) by specific algorithm, send to data encrypting and deciphering algoritic module again.Therefore, the privacy key (SK) that transmission channel is transmitted is all different in each transmission, even if detect the data message in transmission channel, also cannot crack key.
Accordingly, see Fig. 5, be depicted as the theory diagram of the another kind of embodiment of data encrypting and deciphering control module in Fig. 1, data encrypting and deciphering control module (12) also comprises anti-randomized processing module (126), anti-randomized processing module (126) is connected with control module (121), after the data received from described authentication and key management module (13) are carried out anti-randomized algorithm process, obtain encryption and decryption key.Anti-randomized processing module (126) is corresponding with randomization module (138), processes the privacy key received (SK) by the algorithm of agreement, removes RN, obtains key (K).
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (10)
1. an encryption solid state memory disc, it is characterized in that, this dish has the function of authentication and data encryption, comprises communication interface (11), data encrypting and deciphering control module (12), authentication and key management module (13), identity input media (14) and solid storage medium (15);
Described communication interface (11) is connected with outer computer, for carrying out data communication with outer computer;
Described identity input media (14) is for gathering the identity information of user's input;
The identity information that described authentication and key management module (13) gather for receiving described identity input media (14), carry out authentication with the subscriber identity information prestored within it, and authentication by after send to described data encrypting and deciphering control module (12) by storing encryption and decryption key within it;
Described solid storage medium (15) is for storing the data after encryption;
Described data encrypting and deciphering control module (12) is connected with solid storage medium (15) with described communication interface (11), authentication and key management module (13), data stored in time, described data encrypting and deciphering control module (12) obtains data from communication interface (11) and stored in solid storage medium (15) after being encrypted according to these data of encryption and decryption double secret key obtained from authentication and key management module (13);
When reading data, described data encrypting and deciphering control module (12) obtains data from solid storage medium (15) and sends to communication interface (11) according to after this decrypt data of encryption and decryption double secret key obtained from authentication and key management module (13).
2. encryption solid state memory disc according to claim 1, it is characterized in that, described data encrypting and deciphering control module (12) comprises control module (121), data buffer (122), communication interface (123), encryption and decryption hardware module (124) and key cache device (125), wherein
Described communication interface (123), for carrying out data communication with authentication and key management module (13), receives the encryption and decryption key that described key management module (13) sends;
Described control module (121) is connected with key cache device (125) with described data buffer (122), communication interface (123), encryption and decryption hardware module (124), for the operation between control data encryption and decryption control module (12) interior modules;
Described encryption and decryption hardware module (124) is for carrying out encryption and decryption operation to data;
Described data buffer (122) is for data cached information;
Described key cache device (125) is volatile storage, for storing encryption and decryption key.
3. encryption solid state memory disc according to claim 1, it is characterized in that, described authentication and key management module (13) comprise communication interface (131), data buffer (132), processor (133), tandom number generator (134), authentication module (135) and non-volatile memory medium (136), wherein
Encryption and decryption key, for carrying out data communication with data encrypting and deciphering control module (12), is sent to described data encrypting and deciphering control module (12) by described communication interface (131);
Described data buffer (132) is for data cached information;
Described non-volatile memory medium (136) comprises key storage district (137) and identity information memory block (138), and described key storage district (137) is for storing encryption and decryption key; Described identity information memory block (138) is for storing subscriber identity information;
The identity information that described authentication module (135) gathers for receiving identity input media (14), carries out authentication with the identity information be stored in described non-volatile memory medium (136);
Described processor (133) is connected with authentication module (135) with described data buffer (132), non-volatile memory medium (136), tandom number generator (134), for the transmission of encryption and decryption key according to the output control of described authentication module (135);
Described tandom number generator (134) is for producing a string character at random;
Described encryption and decryption key is for being produced at random by described tandom number generator (134) during first use and being stored in described key storage district (137).
4. encryption solid state memory disc according to claim 3, it is characterized in that, described authentication and key management module (13) also comprise encrypting module (137), described encrypting module (137) is connected with processor (133), is stored in described non-volatile memory medium (136) after encryption and decryption key and subscriber identity information being encrypted again.
5. the encryption solid state memory disc according to claim 3 or 4, it is characterized in that, described authentication and key management module (13) also comprise randomization module (138), described randomization module (138) is connected with data buffer (132) with processor (133), tandom number generator (134), sends to data encrypting and deciphering control module (12) again after encryption and decryption key is carried out randomized algorithm process by the random character for producing according to described tandom number generator (134).
6. encryption solid state memory disc according to claim 1, it is characterized in that, described data encrypting and deciphering control module (12) also comprises anti-randomized processing module (126), described anti-randomized processing module (126) is connected with control module (121), after the data received from described authentication and key management module (13) are carried out anti-randomized algorithm process, obtain encryption and decryption key.
7. encryption solid state memory disc according to claim 1, is characterized in that, described communication interface (11) adopts one of following conventional interface: USB, PATA/SATA, SAS, PCIE, SD or MMC.
8. encryption solid state memory disc according to claim 1, is characterized in that, described identity input media (14) is key-press module or biometric sensor; Described biometric sensor is fingerprint sensor or iris sensor.
9. encryption solid state memory disc according to claim 1, it is characterized in that, described solid storage medium (15) is the non-volatility memorizer of stock for semiconductor, is any one in flash memory (FLASH), phase transition storage (PRAM), SD or eMMC memory module.
10. encryption solid state memory disc according to claim 2, it is characterized in that, described encryption and decryption hardware module (124) is realized by hardware circuit, and its built-in enciphering and deciphering algorithm adopts one of following cryptographic algorithm generally used both at home and abroad: the close algorithm of AES, RSA, ECC, DES/3/DES, SHA, GOST or state.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107277007A (en) * | 2017-06-14 | 2017-10-20 | 山东中创软件商用中间件股份有限公司 | A kind of data encryption and transmission method and device |
| CN109934024A (en) * | 2019-03-12 | 2019-06-25 | 深圳忆联信息系统有限公司 | A kind of flash data encryption and decryption optimization method and its system |
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2014
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107277007A (en) * | 2017-06-14 | 2017-10-20 | 山东中创软件商用中间件股份有限公司 | A kind of data encryption and transmission method and device |
| CN109934024A (en) * | 2019-03-12 | 2019-06-25 | 深圳忆联信息系统有限公司 | A kind of flash data encryption and decryption optimization method and its system |
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| CP03 | Change of name, title or address |
Address after: Hangzhou City, Zhejiang province 311200 Xiaoshan District Road No. 66 Building No. 1 building 22 layer Huarui Center Patentee after: SAGE MICROELECTRONICS CORP. Address before: 311200, room 1038, 902 water tower, Jincheng Road, Xiaoshan District, Zhejiang, Hangzhou Patentee before: Hangzhou Sage Microelectronics Technology Co., Ltd. |