Network coding method for preventing eavesdropping attack and pollution attack

Abstract

The invention discloses a network coding method for preventing eavesdropping attack and pollution attack. The method comprises the following steps: generating an encryption matrix, a secret key matrix, a pseudo-random vector, a first pseudo-random function, a second pseudo-random function, a third pseudo-random function, a fourth pseudo-random function, a secret key matrix and an inner product of the secret key matrix and theta-th new information; sending the key matrix, the first pseudo-random function, the fourth pseudo-random function, the first pseudo-random number and the pseudo-random vector to an information source node; sending one of the row of the key matrix, the fourth pseudo-random function and the pseudo-random vector to an intermediate node; and sending the key matrix, the pseudo-random vector, the first pseudo-random function, the second pseudo-random function, the third pseudo-random function and the fourth pseudo-random function to each sink node. Therefore, pollution attacks can be prevented and malicious pollution nodes can be tracked by utilizing the inner product of the constant null space, and the encryption matrix can be hidden in the element sum of the product matrix of the key submatrix and the information signature submatrix to prevent eavesdropping attacks.

Description

technical field [0001] This document relates to the field of communication technology, in particular to a network coding method for preventing eavesdropping attacks and pollution attacks. Background technique [0002] Network coding has revolutionized the way of traditional network data storage and forwarding, allowing intermediate nodes to re-encode data packets before forwarding, which can make the network throughput reach the maximum flow-minimum cut, but because of the re-coding characteristics of network coding, network nodes are vulnerable to Security attacks mainly include pollution attacks and eavesdropping attacks. If the pollution attack is not stopped, the pollution will spread in the network, causing the sink node to be unable to correctly decode the data packets, and even cause the network to be paralyzed; if the eavesdropping attack is not prevented, it will cause the leakage of important original information of the network. Anti-pollution attacks mainly inclu...

AI Technical Summary

Problems solved by technology

[0004] This specification provides a network coding method for preventing eavesdropping attacks and pollution attacks, which is used to solve the problem that most of the anti-attack schemes in network coding schemes are relatively single

Images