Anti-eavesdropping coding method based on fountain code coding

Abstract

The invention discloses an anti-eavesdropping coding method based on fountain code coding. The method comprises the following steps: a sending end receives a random binary code sent and broadcasted by a receiving end; the sending end determines a matrix p1, the degree of which is 1; a matrix p2 is determined according to a transfer fountain code distribution function; a fountain coding matrix p is determined according to the matrix p1 and the matrix p2; the fountain coding matrix p is multiplied by k symbols of an information source to obtain fountain codes; and the random binary code and the fountain codes are subjected to exclusive-or operation to obtain coded information and the coded information is sent to the receiving end. According to the anti-eavesdropping coding method based on fountain code coding, the method is based on an information fountain code coding method and combines with noise signals; and when a receiver recovers information source information, it is hard for an eavesdropper to recover codes of all information due to randomness of a noise channel, so that error symbol rate in the speech receiving channel is high, eavesdropping fails and a purpose of safety communication is achieved.

Description

technical field [0001] The invention relates to the field of wireless transmission security, in particular to an anti-eavesdropping coding method based on fountain code coding. Background technique [0002] Voice communication plays an important role in wireless communication. Due to the broadcast characteristics of wireless communication, voice communication can be eavesdropped by any node within the transmission range, and is more vulnerable to the threat of eavesdropping. Data interception and malicious use will be a huge threat to wireless communication. threat. [0003] The traditional anti-eavesdropping technology mainly adds a confidentiality agreement in the communication network layer, and its password design is the focus of wireless security research. [0004] However, the traditional computing security model mainly relies on the computing power of the attacker. With the rapid development of computer technology, the cryptographic system of communication can be com...

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Problems solved by technology

[0005] The embodiment of the present invention provides an anti-tapping coding method based on fountain code coding, which solves the problem of low security of anti-tapping encryption in the prior art

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