CN103580854B - A kind of dynamic code book management method of quantum secret communication system - Google Patents
A kind of dynamic code book management method of quantum secret communication system Download PDFInfo
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- CN103580854B CN103580854B CN201310523402.5A CN201310523402A CN103580854B CN 103580854 B CN103580854 B CN 103580854B CN 201310523402 A CN201310523402 A CN 201310523402A CN 103580854 B CN103580854 B CN 103580854B
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Abstract
The invention discloses the dynamic code book management method of a kind of quantum secret communication system, the method includes communicating pair and each sets up the credible buffer area of same number, synchronization part buffer area is used for encryption and decryption functions, remaining cache district is used for filling new key function, the function of the buffer area filling switching at runtime according to new key, it is achieved key seamless link；During communication, coding staff need to inform that decoding side this time uses code book numbering, and decoding side is according to numbering deciphering；When using new code book, old code book does not abandon immediately, but waits until that both sides receive after new numbering confirms and update, it is ensured that the concordance of code book under full-duplex mode。The present invention both can guarantee that and carried out full duplex secret communication between terminal, can realize again the dynamic seamless link of key。Can be used for solving equipment sending and receiving end in quantum secret communication system and share code book and the problem of code book synchronous dynamic renewal, promote the encryption transmitting characteristic of quantum communication system, there is the feature of high efficiency and high stability。
Description
Technical field
The present invention relates to Quantum Secure Communication field, specifically be in quantum secret communication system, it is provided that a kind of novel dynamic code book management method。
Background technology
Quantum Secure Communication is from proposing to have gone through so far the development of 30 years, it uses single photon to load and transmission information, utilize the unclonable principle of single quantum state and uncertainty principle, listener-in may result in quantum state change once carry out the operations such as eavesdropping, thus being found by legal communicating pair, thus quantum secret communication can effectively ensure the safety of communication。
The practical basis of current Quantum Secure Communication is ripe, and secret communication commercial product model machine also releases one after another, but there is presently no the quantum key Managed Solution of a set of function admirable。Existing system generally adopts the method to the single-threaded process of key, so can cause producing of short duration delay when more new key, and this delay reduces the encryption and decryption efficiency of quantum secret communication。
The method can solve same equipment and have only between a code book and two equipment to encrypt the problem that code book synchronous dynamic updates, it is achieved the dynamic encryption of system transmitting。And existing system, the code book of use is to use Polynomial generation, and code book easily cracks。Use the fixed codebook of both sides' agreement, it is impossible to enough dynamically renewals, it is easy to being cracked, communication encryption is bad。
Summary of the invention
It is an object of the invention to the dynamic code book management method of a kind of quantum secret communication system proposed for the deficiencies in the prior art, the method use two or more cipher key cache districts (buffer) quantum cryptography is dynamically updated, and by keeping synchronizing between communicating pair to the different buffer mode being numbered；Achieve seamless link when calling quantum key, also ensure that both sides use identical key in a full-duplex mode simultaneously。
The purpose of the present invention is realized by techniques below scheme:
A, communicating pair (ALC and BOB) each set up several buffer areas (two or more) of same number, this buffer area is credible buffer area, do not share with the external world, synchronization a portion buffer area is used for encryption and decryption, another part buffer area is for filling new key, and the function of buffer area dynamically can be changed according to the filling situation of new key。After new key fills full buffer area, switch this buffer area function for encryption and decryption, concurrently disinfect old buffer area so that more new key。This switching constantly carries out, it is ensured that seamless link when key uses。
B, code book to buffer area are numbered。During communication, coding staff need to inform decoding side's code book numbering that this time packet uses, and decoding side is decrypted according to numbering。When using the code book of new numbering, old code book does not abandon immediately, but waits until that both sides receive after new numbering confirms and just update。So can ensure that the concordance of code book under full-duplex mode。
The present invention both can guarantee that and carried out full duplex secret communication between terminal, can realize again the dynamic seamless link of key。Can be used for solving equipment sending and receiving end in quantum secret communication system and share code book and the problem of code book synchronous dynamic renewal, promote the encryption transmitting characteristic of quantum communication system, and there is the feature of high efficiency and high stability。
Accompanying drawing explanation
Fig. 1 present invention is credible, and buffer memory buf controls exemplary plot；
Fig. 2 flow chart of the present invention；
Fig. 3 present invention application schematic diagram。
Detailed description of the invention
Feature of present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, in order to the understanding of technical staff of the same trade:
Specifically for two buf, device A/B has two credible buffer areas (buf0/buf1), is respectively intended to deposit code book。
Data, all without code book in two buffer areas, now can not be carried out encryption and decryption by stage A: after just having powered on。
First stage B: device A/B fill in code book in buf0, and stage B is in buf1 and is filled with code book, and now device A/B can use and carry out two-way encryption and decryption transmission in buf0。
Stage C: when the code book in buf0 is used for adding ciphertext data time, device A/B can write code book in buf1 in the past。In Fig. 1, stage C is in buf1 and is just filled with code book。Detect buf1 also fills out be filled with code book when the code book being currently in use in buf0 carries out the module of encryption and decryption, then the encryption end of device A/B can switch (or postpone switching) immediately and is encrypted to the code book of use buf1, and now can not discharge the code book in buf0 immediately, because decrypting end can not switch immediately, now both there is code book。
Stage D: after device A/B encrypting module is switched to buf1 code book by buf0, wait for a period of time (waiting time depends on the length of optical fiber between device A/B), ensureing that deciphering module is also switched to buf1 code book, can discharge the code book in buf0, this is stage D；
Stage E: the same with stage C principle, uses while buf1 code book is transmitted in encryption and decryption, it is possible to write code book in buf0, and stage E is buf0 and writes again and expired code book, now can switch over code book, and handoff procedure is the same with stage C。So repeat。
The code book deposited in above-mentioned credible buffer memory buf can be numbered, and in the process of encryption and decryption, coding staff can be sent to decoding side the numbering of encryption code book, and decoding side is decoded according to numbering。During communication, coding staff need to inform decoding side's code book numbering that this time packet uses, and decoding side is decrypted according to numbering。When using the code book of new numbering, old code book does not abandon immediately, but waits until that both sides receive after new numbering confirms and just update。As shown in Figure 2, if the coding staff of ALC and BOB is all switched to code book 1 from code book 0, but owing to the decoding side of ALC and BOB still uses code book 0, then code book 0 can not discharge, by the time have to be also switched to code book 1 in the side of decoding, now can discharge code book 0。
Consult the application drawing that Fig. 3 is the present invention, data encryption system first passes through quantum channel and completes into code, obtain the code book of encryption and decryption, then carry out code book again through the credible buffer memory switching flow in the present invention and dynamically manage (this sentences two credible buffer memorys is example), use code book numbering application flow that the code book in credible buffer memory is numbered, carry out encryption and decryption to transmitting/receiving data, and simultaneously bi-directionally transmitted by classical channel。
Claims (1)
1. the dynamic code book management method of a quantum secret communication system, it is characterised in that the method includes step in detail below:
A, communicating pair each set up several buffer areas of same number, this buffer area is credible buffer area, do not share with the external world, synchronization a portion buffer area is used for encryption and decryption functions, another part buffer area is used for filling new cipher key function, the function of the buffer area filling switching at runtime according to new key；After new key generates and fills up buffer area, this buffer area switches to encryption and decryption functions by filling function, and removes old buffer area so that more new key；This switching constantly carries out, it is ensured that seamless link when key uses；
B, code book to buffer area are numbered
During communication, coding staff need to inform decoding side's code book numbering that this time packet uses, and decoding side is decrypted according to numbering；When using the code book of new numbering, old code book does not abandon immediately, but waits until that both sides receive after new numbering confirms and just update, it is ensured that the concordance of code book under full-duplex mode。
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| CN104518865B (en) * | 2014-12-12 | 2017-06-16 | 南京邮电大学 | A kind of data ciphering method based on code book |
| CN106230585A (en) * | 2016-07-22 | 2016-12-14 | 安徽皖通邮电股份有限公司 | A kind of method that quantum key Fast synchronization updates |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1755269A1 (en) * | 2005-08-18 | 2007-02-21 | NEC Corporation | Secret communication system and method for generating shared secret information |
| CN1957553A (en) * | 2004-05-24 | 2007-05-02 | Magiq技术公司 | Key bank systems and methods for QKD |
| CN101820343A (en) * | 2010-02-05 | 2010-09-01 | 北京邮电大学 | Method and system for quantum communication security |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1957553A (en) * | 2004-05-24 | 2007-05-02 | Magiq技术公司 | Key bank systems and methods for QKD |
| EP1755269A1 (en) * | 2005-08-18 | 2007-02-21 | NEC Corporation | Secret communication system and method for generating shared secret information |
| CN101820343A (en) * | 2010-02-05 | 2010-09-01 | 北京邮电大学 | Method and system for quantum communication security |
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Effective date of registration: 20180827 Address after: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Co-patentee after: East China Normal University Patentee after: Shanghai Langyan Optoelectronics Technology Co.,Ltd. Address before: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Patentee before: Shanghai Langyan Optoelectronics Technology Co.,Ltd. |
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Effective date of registration: 20211012 Address after: Room 4001, building 21, No. 123, Lane 1165, Jindu Road, Minhang District, Shanghai 201100 Patentee after: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee after: Chongqing Research Institute of East China Normal University Address before: 200237 District 2319, room 69, Lane 1985, Chunshen Road, Minhang District, Shanghai 1 district. Patentee before: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: EAST CHINA NORMAL University |
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Effective date of registration: 20230512 Address after: No. 205, 2nd Floor, No. 91 Jihuayuan East Road, Dazhulin Street, Liangjiang New District, Chongqing, 400000 Patentee after: Chongqing Huapu Scientific Instrument Co.,Ltd. Address before: Room 4001, building 21, No. 123, Lane 1165, Jindu Road, Minhang District, Shanghai 201100 Patentee before: SHANGHAI LANGYAN OPTOELECTRONICS TECHNOLOGY Co.,Ltd. Patentee before: Chongqing Research Institute of East China Normal University |