CN101009562A - Method and system for improving the security of the intelligent secret key device - Google Patents
Method and system for improving the security of the intelligent secret key device Download PDFInfo
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- CN101009562A CN101009562A CN 200710063464 CN200710063464A CN101009562A CN 101009562 A CN101009562 A CN 101009562A CN 200710063464 CN200710063464 CN 200710063464 CN 200710063464 A CN200710063464 A CN 200710063464A CN 101009562 A CN101009562 A CN 101009562A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012790 confirmation Methods 0.000 claims description 32
- 230000005540 biological transmission Effects 0.000 claims description 28
- 238000010200 validation analysis Methods 0.000 claims description 8
- 230000001133 acceleration Effects 0.000 claims description 6
- 230000036760 body temperature Effects 0.000 claims description 6
- 230000005684 electric field Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
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- 230000008676 import Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
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Abstract
The provided method to improve the intelligent key device security, which belongs to the information security field and comprises following steps: connecting the intelligent key device and computer, receiving data from computer by the key device after identifying user ID successfully, and repeating in speech; once user conforming the repeated content, taking digital signature or enciphering data. The corresponding system comprises these modules for former operation. This invention can prevent distorting the digital signature or code, and improves the security for intelligent key device greatly.
Description
Technical field
The present invention relates to information security field, particularly a kind of method and system that improves safety of intelligent key equipment.
Background technology
Intelligent cipher key equipment is a kind of small hardware device that has processor and memory, and it adopts the double factor authentication pattern, and use is simple, cost is lower.Its built-in single-chip microcomputer or intelligent card chip can be stored user's key or digital certificate, utilizes the authentication of the built-in cryptographic algorithm realization of intelligent cipher key equipment to user identity.That intelligent cipher key equipment has is E-mail enciphered, digital signature, safety certificate, secure network login and visit SSL (Security Socket Layer, the secure socket layer protocol layer) function such as secure network, and has the feature that the private key that guarantees the user leaves hardware never, also have the characteristic of attack protection physically, fail safe is high.
Intelligent cipher key equipment uses encryption usually or comes identifying user identity based on the digital signature of public key system, and the digital signature of public key system had both guaranteed the confidentiality of information, and the information that guaranteed again has non repudiation.The principle of using digital signature to verify is: at first with being verified the private key for user signature expressly, obtain digital signature, then digital signature is sent to authentication, authentication is decrypted with the PKI that is verified the user, and last and original text compares, and verifies.Data length to the need signature during digital signature is conditional, earlier the plaintext of needs signature is carried out HASH (Hash) computing usually so be verified the user, the HASH value is imported in the intelligent cipher key equipment signed then.The HASH algorithm also claims one-way Hash algorithm, is meant under the situation of known operations result and algorithm the algorithm that can not backwards calculation goes out raw information.Hash algorithm all can produce the output of regular length to the input information (being commonly called as seed) of different length.
Said process need can not guarantee the fail safe of digital signature or enciphered data fully, because also there is potential safety hazard in computer itself, for example, when computer has suffered trojan horse, need digital signature or ciphered data to be distorted by the bottom wooden horse, be transferred to intelligent cipher key equipment then and carry out digital signature or encryption, whether the user can't judge in the intelligent cipher key equipment needs digital signature or ciphered data correct, this has had a strong impact on the fail safe of intelligent cipher key equipment, make intelligent cipher key equipment lose the value of its existence, simultaneously, also will inevitably bring unnecessary loss to the user.
Voice technology has been applied in the intelligent cipher key equipment at present, mainly as prompt facility, for example, the prompting of greeting information, operation prompt information, fault alarm, affirmation input, read-write operation indication or the like.
Summary of the invention
In order to solve in the prior art owing to needing to encrypt or the data of signature may be distorted the problem that causes safety of intelligent key equipment to reduce, the invention provides a kind of method that improves safety of intelligent key equipment, specifically may further comprise the steps:
Steps A: connect intelligent cipher key equipment and computer, and the user carried out authentication, behind authentication success, described computer receive the data of described user's input and with described transfer of data to described intelligent cipher key equipment;
Step B: described intelligent cipher key equipment receives the laggard lang sound repetition of data that described computer transmission comes, and after receiving the affirmation information of described user, the data that described intelligent cipher key equipment receives are carried out digital signature or encryption according to the content input of described intelligent cipher key equipment phonetic rehearsal.
Described step B is specially:
After described intelligent cipher key equipment receives the next data of described computer transmission, the described data of phonetic rehearsal; And after the affirmation information of when receiving the data consistent of described user, importing, the data that described intelligent cipher key equipment receives are carried out digital signature or encryption in the data of described intelligent cipher key equipment phonetic rehearsal and described input.
Described step B is specially:
Described intelligent cipher key equipment is resolved earlier and is obtained critical data, then the described critical data of phonetic rehearsal after receiving the next data of described computer transmission; And after receiving the affirmation information of importing when the critical data of described user at described intelligent cipher key equipment phonetic rehearsal conforms to the data of described input, the data that described intelligent cipher key equipment receives are carried out digital signature or encryption.
User described in the described step B utilizes input unit on the described intelligent cipher key equipment to described intelligent cipher key equipment input validation information.
Described input unit is single button, numerical key, sensor devices, fingerprint scanner, audio-switch, body temperature inductor, pressure inductor, vibrating sensor, acceleration transducer, magnetic sensors or electric field induction device.
Described step B also comprises:
Described intelligent cipher key equipment generates authentication code, the described authentication code of phonetic rehearsal then; And after receiving the confirmation code of described user, verify whether described confirmation code is consistent with the authentication code of current generation by described computer input, if consistent, then the data that described intelligent cipher key equipment is received are carried out digital signature or encryption.
Described intelligent cipher key equipment generates authentication code at random or generates different authentication codes at every turn.
The step of in the described steps A user being carried out authentication is specially:
Whether the PIN code or the human body biological characteristics of checking user input be correct.
The present invention also provides a kind of system that improves safety of intelligent key equipment, and described system comprises:
Authentication module is used for after intelligent cipher key equipment is connected to computer, and the user is carried out authentication;
Data reception module is used at described authentication module authentication success and receive the data of described user's input at described computer after, reception is by the next data of described computer transmission;
Voice module is used for receiving the laggard lang sound of data that is come by described computer transmission at described data reception module and repeats;
The confirmation receiver module is used to receive the affirmation information of described user according to the content input of described voice module phonetic rehearsal;
Intelligent key module is used for after described confirmation receiver module receives the affirmation information of described user's input the data that described data reception module receives being carried out digital signature or encryption.
Described voice module specifically is used for the described data of phonetic rehearsal after described data reception module receives the next data of described computer transmission.
Described system also comprises:
Data resolution module is used for resolving and obtaining critical data after described data reception module receives the next data of described computer transmission;
Correspondingly, described voice module also is used for the critical data that the described data resolution module of phonetic rehearsal obtains.
Described system also comprises:
The authentication code generation module is used to generate authentication code;
Correspondingly, described voice module also is used for the authentication code of the current generation of the described authentication code generation module of phonetic rehearsal;
Described confirmation receiver module specifically is used to receive the confirmation code of described user according to the authentication code input of described voice module phonetic rehearsal;
Described intelligent key module specifically is used for after described confirmation receiver module receives the confirmation code of described user's input, when this confirmation code of checking is consistent with the authentication code of the current generation of described authentication code generation module, the data that described data reception module receives are carried out digital signature or encryption.
Described system also comprises:
Input unit is used for for user's input validation information, and gives described confirmation receiver module with the affirmation message transmission of user's input.
Described input unit is single button, numerical key, sensor devices, fingerprint scanner, audio-switch, body temperature inductor, pressure inductor, vibrating sensor, acceleration transducer, magnetic sensors or electric field induction device.
The present invention utilizes voice technology, before intelligent cipher key equipment carries out digital signature or encrypts, by the function of intelligent cipher key equipment phonetic rehearsal data, confirms for the user; The user confirms by the input unit of intelligent cipher key equipment or the authentication code of intelligent cipher key equipment generation, has not only effectively prevented forbidden digit signature or encryption, and the fail safe that has greatly improved intelligent cipher key equipment.
Description of drawings
Fig. 1 is the method flow diagram that the embodiment of the invention one improves safety of intelligent key equipment;
Fig. 2 is the system construction drawing that the embodiment of the invention three improves safety of intelligent key equipment;
Fig. 3 is the system construction drawing that the embodiment of the invention four improves safety of intelligent key equipment;
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments, but the present invention is not limited to the following examples.
Embodiment one
Identification authentication mode in the present embodiment is the PIN code authentication mode, needing digital signature or ciphered data is the information (as Bank Account Number, trade date, dealing money or the like) that the user need conclude the business, the user imports in the intelligent cipher key equipment by the information that computer will need to conclude the business, and, confirm the data that the intelligent cipher key equipment phonetic rehearsal goes out by the input unit on the intelligent cipher key equipment (as single button).
Referring to Fig. 1, the embodiment of the invention provides a kind of method that improves safety of intelligent key equipment, specifically may further comprise the steps:
Step 101: the user is connected to client computer with intelligent cipher key equipment;
Step 102: the user imports PIN code;
Step 103: whether the PIN code of intelligent cipher key equipment checking user input is correct, if correct, then execution in step 105, if incorrect and number of retries is full, then execution in step 104;
Step 104: the user is the disabled user, and intelligent cipher key equipment prompting error message finishes then;
Step 105: the user confirms as the legal holder of intelligent cipher key equipment by authentication, and client computer receives the information that the needs of user's input are concluded the business, and this Transaction Information is transferred in the intelligent cipher key equipment;
Step 106: intelligent cipher key equipment is resolved it after receiving the next data of client computer transmission, obtains critical data, and this critical data of phonetic rehearsal; This critical data is the part in the client computer transmission data of coming, data that can the representative of consumer input; For example, the data of user's input are: address name, Bank Account Number, trade date, transaction classification and dealing money, and then critical data is: Bank Account Number, transaction classification and dealing money, these three data can be represented above-mentioned five data;
Step 107: the user judges whether the critical data of intelligent cipher key equipment phonetic rehearsal conforms to the information that need conclude the business, judge promptly whether the critical data of intelligent cipher key equipment phonetic rehearsal has represented the information that need conclude the business, if then execution in step 109, otherwise execution in step 108;
Step 108: the user cancels current operation, finishes then;
Step 109: the user is by the input unit on the intelligent cipher key equipment, and promptly single button to intelligent cipher key equipment input validation information, confirms that promptly the critical data of intelligent cipher key equipment phonetic rehearsal has been represented the information that need conclude the business;
Step 110: after intelligent cipher key equipment was received user's affirmation information, the information that the needs of above-mentioned user's input that transmission comes to client computer are concluded the business was carried out the HASH computing, obtains the HASH value;
Step 111: intelligent cipher key equipment utilizes private key that the HASH value is carried out digital signature, and by client computer digital signature is sent to server end;
Step 112: the public key verifications digital signature that the server end utilization is corresponding with above-mentioned private key, if the verification passes, then execution in step 114, otherwise execution in step 113;
Step 113: server end returns error message, and authentication failed is closed the trade then;
Step 114: checking is passed through, and finishes transaction.
Input unit in the present embodiment is that single button can be replaced by numerical key, sensor devices, fingerprint scanner, audio-switch, body temperature inductor, pressure inductor, vibrating sensor, acceleration transducer, magnetic sensors or electric field induction device.Carrying out the mode of authentication can be replaced by the mode that carry out authentication by the human body biological characteristics of verifying user's input by the PIN code of checking user input.
Embodiment two
Different with embodiment one is the user confirms the intelligent cipher key equipment phonetic rehearsal by the mode of input validation sign indicating number critical data.Intelligent cipher key equipment generates an authentication code, and in the phonetic rehearsal critical data, the authentication code that phonetic rehearsal generates; The user is when carrying out the affirmation of critical data, need be according to the authentication code of phonetic rehearsal input validation sign indicating number on computers, computer is transferred to intelligent cipher key equipment with the confirmation code of user's input again, intelligent cipher key equipment compares the confirmation code of user's input and the authentication code of current generation, if the two unanimity, show that then the user has confirmed that the critical data of intelligent cipher key equipment phonetic rehearsal can represent the information that need conclude the business, the user is by checking, otherwise intelligent cipher key equipment prompting error message, the user rs authentication failure.Other processes are all identical with embodiment one, do not repeat them here.
Intelligent cipher key equipment in the present embodiment generates authentication code at random or generates different authentication codes at every turn, so greatly improved the fail safe of intelligent cipher key equipment.Even the authentication code of this generation is monitored, then supervise the hearer when carrying out the checking of back, because authentication code has regenerated and identical probability is very little, therefore supervise the hearer and be difficult to also just be difficult to utilize user profile to carry out operations such as illegal transaction by checking.
Among above-mentioned two embodiment, the content of intelligent cipher key equipment phonetic rehearsal all is the critical data through obtaining after resolving, the user confirms by judging whether critical data conforms to the data of oneself importing, this mode can replace with: intelligent cipher key equipment is not carried out the step of parsing, but directly phonetic rehearsal transmits the data of coming by computer; Correspondingly, whether the data of the data of user by judging the intelligent cipher key equipment phonetic rehearsal and its input are consistent confirms.
Embodiment three
Referring to Fig. 2, the embodiment of the invention also provides a kind of system that improves safety of intelligent key equipment, specifically comprises:
(1) authentication module is used for after intelligent cipher key equipment is connected to computer, and the user is carried out authentication;
(2) data reception module is used at the authentication module authentication success and receive the data of user's input at computer after, reception is by the next data of computer transmission;
(3) voice module is used for receiving the laggard lang sound repetition of data that the computer transmission comes at data reception module;
(4) confirmation receiver module is used to receive the affirmation information of user according to the content input of voice module phonetic rehearsal;
(5) intelligent key module is used for after the confirmation receiver module receives the affirmation information of user's input the data that the data receiver module receives being carried out digital signature or encryption.
Above-mentioned voice module specifically is used for after data reception module receives the next data of computer transmission, the data that the phonetic rehearsal data reception module receives.
The system of above-mentioned raising safety of intelligent key equipment also comprises:
Data resolution module is used for resolving and obtaining critical data after above-mentioned data reception module receives the next data of computer transmission;
Correspondingly, above-mentioned voice module also is used for the critical data that the above-mentioned data resolution module of phonetic rehearsal obtains.
The system of above-mentioned raising safety of intelligent key equipment also comprises:
The authentication code generation module is used to generate authentication code; The authentication code generation module can generate authentication code at random, also can generate different authentication codes at every turn;
Correspondingly, above-mentioned voice module also is used for the authentication code of the current generation of phonetic rehearsal authentication code generation module;
Above-mentioned confirmation receiver module specifically is used to receive the confirmation code of user according to the authentication code input of above-mentioned voice module phonetic rehearsal;
Above-mentioned intelligent key module specifically is used for after the confirmation receiver module receives the confirmation code of user's input, when this confirmation code of checking is consistent with the authentication code of the current generation of above-mentioned authentication code generation module, the data that above-mentioned data reception module receives are carried out digital signature or encryption.
Embodiment three
Referring to Fig. 3, the embodiment of the invention also provides a kind of system that improves safety of intelligent key equipment, specifically comprises:
(1) authentication module is used for after intelligent cipher key equipment is connected to computer, and the user is carried out authentication;
(2) data reception module is used at the authentication module authentication success and receive the data of user's input at computer after, reception is by the next data of computer transmission;
(3) voice module is used for receiving the laggard lang sound repetition of data that the computer transmission comes at data reception module;
(4) confirmation receiver module is used to receive the affirmation information of user according to the content input of voice module phonetic rehearsal;
(5) intelligent key module is used for after the confirmation receiver module receives the affirmation information of user's input the data that the data receiver module receives being carried out digital signature or encryption.
Above-mentioned voice module specifically is used for after data reception module receives the next data of computer transmission, the data that the phonetic rehearsal data reception module receives.
The system of above-mentioned raising safety of intelligent key equipment also comprises:
Data resolution module is used for resolving and obtaining critical data after above-mentioned data reception module receives the next data of computer transmission;
Correspondingly, above-mentioned voice module also is used for the critical data that the above-mentioned data resolution module of phonetic rehearsal obtains.
The system of above-mentioned raising safety of intelligent key equipment also comprises:
Input unit is used for for user's input validation information, and gives above-mentioned confirmation receiver module with the affirmation message transmission of user's input.
Above-mentioned input unit is single button, numerical key, sensor devices, fingerprint scanner, audio-switch, body temperature inductor, pressure inductor, vibrating sensor, acceleration transducer, magnetic sensors or electric field induction device.
Above-described embodiment is a more preferably embodiment of the present invention, and common variation that those skilled in the art carries out in the technical solution of the present invention scope and replacement all should be included in protection scope of the present invention.
Claims (14)
1. a method that improves safety of intelligent key equipment is characterized in that, said method comprising the steps of:
Steps A: connect intelligent cipher key equipment and computer, and the user carried out authentication, behind authentication success, described computer receive the data of described user's input and with described transfer of data to described intelligent cipher key equipment;
Step B: described intelligent cipher key equipment receives the laggard lang sound repetition of data that described computer transmission comes, and after receiving the affirmation information of described user, the data that described intelligent cipher key equipment receives are carried out digital signature or encryption according to the content input of described intelligent cipher key equipment phonetic rehearsal.
2. the method for raising safety of intelligent key equipment according to claim 1 is characterized in that, described step B is specially:
After described intelligent cipher key equipment receives the next data of described computer transmission, the described data of phonetic rehearsal; And after the affirmation information of when receiving the data consistent of described user, importing, the data that described intelligent cipher key equipment receives are carried out digital signature or encryption in the data of described intelligent cipher key equipment phonetic rehearsal and described input.
3. the method for raising safety of intelligent key equipment according to claim 1 is characterized in that, described step B is specially:
Described intelligent cipher key equipment is resolved earlier and is obtained critical data, then the described critical data of phonetic rehearsal after receiving the next data of described computer transmission; And after receiving the affirmation information of importing when the critical data of described user at described intelligent cipher key equipment phonetic rehearsal conforms to the data of described input, the data that described intelligent cipher key equipment receives are carried out digital signature or encryption.
4. the method for raising safety of intelligent key equipment according to claim 1 is characterized in that, user described in the described step B utilizes input unit on the described intelligent cipher key equipment to described intelligent cipher key equipment input validation information.
5. the method for raising safety of intelligent key equipment according to claim 4, it is characterized in that described input unit is single button, numerical key, sensor devices, fingerprint scanner, audio-switch, body temperature inductor, pressure inductor, vibrating sensor, acceleration transducer, magnetic sensors or electric field induction device.
6. the method for raising safety of intelligent key equipment according to claim 1 is characterized in that, described step B also comprises:
Described intelligent cipher key equipment generates authentication code, the described authentication code of phonetic rehearsal then; And after receiving the confirmation code of described user, verify whether described confirmation code is consistent with the authentication code of current generation by described computer input, if consistent, then the data that described intelligent cipher key equipment is received are carried out digital signature or encryption.
7. the method for raising safety of intelligent key equipment according to claim 6 is characterized in that, described intelligent cipher key equipment generates authentication code at random or generates different authentication codes at every turn.
8. the method for raising safety of intelligent key equipment according to claim 1 is characterized in that, the step of in the described steps A user being carried out authentication is specially:
Whether the PIN code or the human body biological characteristics of checking user input be correct.
9. a system that improves safety of intelligent key equipment is characterized in that, described system comprises:
Authentication module is used for after intelligent cipher key equipment is connected to computer, and the user is carried out authentication;
Data reception module is used at described authentication module authentication success and receive the data of described user's input at described computer after, reception is by the next data of described computer transmission;
Voice module is used for receiving the laggard lang sound of data that is come by described computer transmission at described data reception module and repeats;
The confirmation receiver module is used to receive the affirmation information of described user according to the content input of described voice module phonetic rehearsal;
Intelligent key module is used for after described confirmation receiver module receives the affirmation information of described user's input the data that described data reception module receives being carried out digital signature or encryption.
10. the system of raising safety of intelligent key equipment according to claim 9 is characterized in that, described voice module specifically is used for the described data of phonetic rehearsal after described data reception module receives the next data of described computer transmission.
11. the system of raising safety of intelligent key equipment according to claim 9 is characterized in that, described system also comprises:
Data resolution module is used for resolving and obtaining critical data after described data reception module receives the next data of described computer transmission;
Correspondingly, described voice module also is used for the critical data that the described data resolution module of phonetic rehearsal obtains.
12. the system of raising safety of intelligent key equipment according to claim 9 is characterized in that, described system also comprises:
The authentication code generation module is used to generate authentication code;
Correspondingly, described voice module also is used for the authentication code of the current generation of the described authentication code generation module of phonetic rehearsal;
Described confirmation receiver module specifically is used to receive the confirmation code of described user according to the authentication code input of described voice module phonetic rehearsal;
Described intelligent key module specifically is used for after described confirmation receiver module receives the confirmation code of described user's input, when this confirmation code of checking is consistent with the authentication code of the current generation of described authentication code generation module, the data that described data reception module receives are carried out digital signature or encryption.
13. the system of raising safety of intelligent key equipment according to claim 9 is characterized in that, described system also comprises:
Input unit is used for for user's input validation information, and gives described confirmation receiver module with the affirmation message transmission of user's input.
14. the system of raising safety of intelligent key equipment according to claim 13, it is characterized in that described input unit is single button, numerical key, sensor devices, fingerprint scanner, audio-switch, body temperature inductor, pressure inductor, vibrating sensor, acceleration transducer, magnetic sensors or electric field induction device.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100634647A CN100566255C (en) | 2007-02-01 | 2007-02-01 | Improve the method and system of safety of intelligent key equipment |
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| CNB2007100634647A CN100566255C (en) | 2007-02-01 | 2007-02-01 | Improve the method and system of safety of intelligent key equipment |
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| CN102223234A (en) * | 2011-06-17 | 2011-10-19 | 飞天诚信科技股份有限公司 | Electronic signature system and method based on audio communication |
| CN101631022B (en) * | 2009-08-04 | 2012-06-27 | 飞天诚信科技股份有限公司 | Signing method and system thereof |
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| CN102737170A (en) * | 2011-04-08 | 2012-10-17 | 杭州晟元芯片技术有限公司 | USB (universal serial bus) key safety chip and voice USB key |
| CN101409622B (en) * | 2008-11-26 | 2012-10-31 | 飞天诚信科技股份有限公司 | Digital signing system and method |
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| CN101420299B (en) * | 2008-11-28 | 2010-09-01 | 北京飞天诚信科技有限公司 | Method for enhancing stability of intelligent cipher key equipment and intelligent cipher key equipment |
| CN101631022B (en) * | 2009-08-04 | 2012-06-27 | 飞天诚信科技股份有限公司 | Signing method and system thereof |
| CN102136057A (en) * | 2011-02-21 | 2011-07-27 | 苏州国芯科技有限公司 | 2.4G/13.56M safety radio frequency card reader and authentication method thereof |
| CN102737170A (en) * | 2011-04-08 | 2012-10-17 | 杭州晟元芯片技术有限公司 | USB (universal serial bus) key safety chip and voice USB key |
| US9172536B2 (en) | 2011-06-17 | 2015-10-27 | Feitian Technologies Co., Ltd. | Audio communication based electronic signature system and method thereof |
| CN102223234A (en) * | 2011-06-17 | 2011-10-19 | 飞天诚信科技股份有限公司 | Electronic signature system and method based on audio communication |
| CN104081713B (en) * | 2012-01-30 | 2018-08-17 | 英特尔公司 | The long-range trust identification of server and client computer in cloud computing environment and geographical location |
| US9910972B2 (en) | 2012-01-30 | 2018-03-06 | Intel Corporation | Remote trust attestation and geo-location of servers and clients in cloud computing environments |
| US9774602B2 (en) | 2012-01-30 | 2017-09-26 | Intel Corporation | Remote trust attestation and geo-location of servers and clients in cloud computing environments |
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| CN103701601A (en) * | 2013-12-16 | 2014-04-02 | 天地融科技股份有限公司 | Data transmission method and system |
| WO2015104001A1 (en) * | 2014-01-13 | 2015-07-16 | 天地融科技股份有限公司 | Data transmission method and system |
| CN104519063B (en) * | 2014-12-17 | 2017-07-14 | 飞天诚信科技股份有限公司 | A kind of implementation method for checking signature |
| CN104519063A (en) * | 2014-12-17 | 2015-04-15 | 飞天诚信科技股份有限公司 | Method for reexamining signatures |
| CN108270767A (en) * | 2016-11-23 | 2018-07-10 | 伊迪米亚身份与安全法国公司 | Data verification method |
| CN108270767B (en) * | 2016-11-23 | 2022-03-29 | 伊迪米亚身份与安全法国公司 | Data verification method |
| CN111510294A (en) * | 2020-05-07 | 2020-08-07 | 与众科技(天津)有限公司 | Method for improving office system security by using secret key |
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| CN100566255C (en) | 2009-12-02 |
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