Key generation method capable of ensuring security of wireless communication

Abstract

The invention belongs to the field of wireless communication, and discloses a key generation method capable of ensuring the security of wireless communication. The key generation method is based on a wireless channel reciprocity and a curve fitting method, extracts a shared key of wireless communication users from a shared wireless channel state to ensure the communication security, and specifically comprises five steps consisting of channel state estimation, pretreatment, quantization and coding, information coordination and privacy amplification; after the treatment of privacy amplification, a generated bit string can be used as a final shared key for transmitting and receiving parties, for protection the subsequent communication security. According to the method, the problem that a difference exists between channel state sequences collected by the transmitting and receiving parties can be solved, key negotiation and whole key generation efficiency are ensured, and the method can be more widely applied to various complex actual application scenarios, for efficiently ensuring the communication security.

Description

technical field [0001] The invention belongs to the field of wireless communication, and relates to a key generation method for ensuring the security of wireless communication. Background technique [0002] Wireless channels are inherently open, which makes the wireless communication process more vulnerable to security threats. Therefore, ensuring wireless communication security is of paramount importance. In the existing security system, the role of the key is irreplaceable, and it is the basis for most security mechanisms. [0003] Traditional key generation methods are mainly based on Public Key Cryptography. Such methods take advantage of the computational difficulty of certain problems to ensure that keys are difficult to crack, and thus require significant computational and other resources. In addition, public key encryption systems usually require an infrastructure (Public Key Infrastructure). To sum up, public-key cryptosystems are not suitable for certain applic...

AI Technical Summary

Problems solved by technology

However, when these schemes are applied to complex scenarios, most of them may fail, because the following factors will cause a lot of differences between the channel state sequences collected by both parties: 1) Many existing transceivers are It is half-duplex, which causes the sending and receiving parties to be unable to detect the channel at the same time; 2) The noise of the channel and the interference experienced are asymmetrical; 3) The hardware device itself is defective

As a result, the differences between these channel state sequences will be transformed into different bits after quantization and encoding, which will cause the bit mismatch rate between the binary bit strings to be too high to complete the key agreement efficiently

In the worst case, some solutions may fail

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