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A partial reconciliation method for key generation combining bbbss protocol and bch code

A BCH code and key generation technology, applied in key distribution, can solve the problem of high complexity of error correction coding and decoding, and achieve the effects of low computational complexity, low interaction times, and low information leakage rate

Active Publication Date: 2021-09-07
SOUTHEAST UNIV
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Problems solved by technology

The decoding complexity of error correction coding is high, and it is not suitable for resource-constrained key generation scenarios

Method used

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  • A partial reconciliation method for key generation combining bbbss protocol and bch code

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Embodiment Construction

[0026] The generation key part reconciliation method of combining BBBSS protocol and BCH code of the present invention, such as figure 1 shown, including the following steps:

[0027] (1) Both communication parties send known pilot signals to each other on the same frequency band, and obtain channel state information at the same time through channel estimation according to the received pilot signals respectively.

[0028] Wherein, A and B may be defined as legal communication parties in the OFDM system, that is, the first communication party and the second communication party. First, A and B respectively send known pilot vectors S to each other on the agreed frequency band to obtain channel estimation results. definition and are respectively the frequency impulse responses on the lth subcarrier detected by A and B according to the channel estimation method at the tth moment, and the frequency impulse responses of all subcarriers at the same moment constitute the channel s...

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Abstract

The invention discloses a partial reconciliation method for key generation combined with the BBBSS protocol and the BCH code, including: (1) both communication parties send known pilot signals to each other on the same frequency band, and obtain channel state information at the same time through channel estimation ; (2) The communication parties preprocess and quantify the channel state information respectively, and use the result as the initial key; (3) The communication parties estimate the inconsistency rate of the initial key according to the received pilot signal, and perform information reconciliation and grouping; (4) Based on the grouping situation in step (3), the two parties in the communication use the BBBSS protocol to partially reconcile the initial key to obtain a partial reconciliation key; (5) the communication party uses the BCH code to perform error correction encoding on the partial reconciliation key, Send the BCH syndrome to the other party, and the other party uses the BCH syndrome to correct part of the reconciliation key; (6) The communication parties perform privacy amplification on the reconciliation key after error correction, and then perform consistency verification to obtain the shared secret key. key. The present invention has low calculation complexity and less interaction times.

Description

technical field [0001] The present invention The present application relates to the field of wireless communication and information encryption, and in particular to the part combining the reconciliation protocol and the error correction coding in the information reconciliation of key generation. Background technique [0002] In wireless communication, at the same time and at the same frequency point, the multipath properties (gain, frequency offset, delay) of the wireless channel are the same for both the sender and receiver, that is, the fading experienced by the signal on the uplink and downlink channels is theoretically consistent. Therefore, in a TDD system, when the uplink and downlink switching rate is fast enough, that is, the duplex time interval is much smaller than the channel coherence time, the wireless uplink and downlink channel gains are highly reciprocal. In addition, the randomness, fast time-varying, and fast space-varying properties of wireless channels pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/08
CPCH04L9/0838H04L9/0861
Inventor 李古月胡爱群张喆颖
Owner SOUTHEAST UNIV
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