Efficient random physical layer secrete key generation method based on vector quantization

Abstract

The invention discloses an efficient random physical layer secrete key generation method based on vector quantization. According to the method, a first wireless network communication party and a second wireless network communication party respectively and simultaneously detect RSS information of a wireless channel and transmit the information to each other, and the first wireless network communication party and the second wireless network communication party operate in the steps of inconsistent removal, vector quantization and fuzzy extraction and ultimately obtain identical bit streams to be used as encrypted secrete keys. The bit generation rate can reach 284%, and random bit streams can be quickly provided for authentication encrypted algorithms of the two communication parties in a wireless network environment to serve as the encrypted secrete keys; the zero error rate can be achieved through the two communication parties, it can be guaranteed that the two communication parties reliably generate the identical bit streams to be used as the encrypted secrete keys, and stability of the method in the operation process is guaranteed; the bit streams produced in the method can pass an NIST randomness test, the produced random bit streams can be used as the secrete keys, and safe communication of the two communication parties is guaranteed.

Description

technical field [0001] The invention belongs to the field of wireless network security, and relates to a method and a related device for efficiently and randomly generating a security key used in a cryptographic algorithm from a physical layer. Generally speaking, the invention can meet the requirements of the security key generation speed and security intensity in the field of wireless network security. Background technique [0002] Various wireless devices have become an integral part of our daily life, through which we can share information and exchange data. For example, a group of tourists need to share resources such as pictures and videos through point-to-point connections, while preventing others from accessing these resources. In order to safely deploy and adopt these applications, it is very important to ensure the confidentiality, integrity and authentication of data transmission. [0003] The broadcast characteristics of wireless networks make it face greater s...

AI Technical Summary

Problems solved by technology

[0005] (1) The existing 802.11 security technology provides authentication and security mechanisms for data frames, but management frames and control frames are not protected

[0006] (2) The theoretical basis of existing security systems is mathematically difficult problems (such as large integer decomposition problems and discrete logarithm calculation problems)

With the development of computing technology, especially the emergence of quantum computers, the computing power of attackers has been greatly improved, and the security of these cryptographic techniques based on computational complexity will be reduced.

[0007] (3) Most cryptographic techniques, especially public key cryptography, have high complexity and computational requirements, so they are not suitable for low-profile distributed wireless networks

[0008] (4) Traditional security mechanisms based on shared keys require key management, distribution, update and maintenance. As the number of nodes increases, the number of required keys increases exponentially, and the workload of key distribution and update will be very large

[0015] At present, the physical layer key generation methods in the field of wireless network security all have the same problem, that is, these methods cannot meet the requirements of high bit generation rate, low bit error rate, and high randomness at the same time.

Most of them sacrifice the bit generation rate to reduce the bit error rate, and the inefficient key generation method causes the node to consume a lot of energy to repeatedly probe the channel to generate a key of sufficient length

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