Secret communication method based on key fusion transformation

Abstract

The invention discloses a secret communication method based on key fusion transformation, which is applied in the field of communication. In view of the problem that the key is easily leaked in the existing security coding method, the method of the invention replaces the original key with the output of the key fusion transformation, Thereby greatly reducing the impact of a single key leak on the information security state; the data transmission system adopted in the present invention includes: a source, a channel, and a sink, and the source and the sink are based on a key generation mechanism, such as a physical layer key generation mechanism, to generate A series of shared key sequences; the source uses the fusion transformation to process the key sequence, and then uses the output result as a temporary key to encrypt and encode the message, and sends the ciphertext to the sink; the sink also uses the result of the fusion transformation as The temporary key decodes the message to obtain the plaintext; because the key fusion transformation protects the randomness of a single key, the probability of secrecy interruption can be significantly reduced.

Description

technical field [0001] The invention belongs to the communication field, in particular to a secret communication technology. Background technique [0002] In the current communication network, in order to prevent sensitive data from being leaked or eavesdropped during communication transmission, security coding methods such as public key encryption and symmetric encryption are usually used to encrypt data and then transmit in the channel. However, with the development of quantum computers , these traditional security coding methods are facing the danger of being cracked. Although post-quantum encryption technology and quantum cryptography have the potential to resist quantum computer attacks, there are challenges such as excessive computational overhead and delay, which make their general promotion difficult. The effectiveness of existing cryptographic methods, including public-key encryption systems, symmetric encryption, post-quantum encryption, and homomorphic encryption...

AI Technical Summary

Problems solved by technology

Moreover, the concealment and unpredictability of eavesdropping makes it difficult to locate the eavesdropper, so it is impossible to completely avoid the problem of key exposure

Generally, the key exposure problem can be expressed as a single attack or continuous leakage model, and the existing main countermeasure is to use fresh keys frequently to update keys with potential leakage problems, but this will waste a lot of precious entropy resources

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