Secure network coding transmission method and secure network coding transmission device using cache nodes

Abstract

A secure network coding transmission method and a secure network coding transmission device using cache nodes specifically comprise functions of achieving confidentiality of a network through encrypted message source information and using integral check codes to achieve integrity check of the network. In encryption of message source information, the confidentiality function of the network can be achieved only by encrypting a part of information, thereby indirectly decreasing information quantity required to be encrypted. Middle nodes in the device have a caching function so that the integrity check is achieved through a middle node check method and a middle node retransmission method.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a method and device for secure network coding transmission using cache nodes. Background technique [0002] At present, the role of intermediate nodes in communication networks is mainly store and forward. It is difficult for the network to achieve the maximum flow goal proposed by Shannon. This situation has not changed until network coding is proposed. The original intention of network coding is to increase the maximum flow of the network, but in the research process, it is found that network coding also has a very good prospect in network security. [0003] For traditional multicast methods, if an eavesdropper has the opportunity to eavesdrop on a certain path of information in the network, it can restore the original data based on the eavesdropping information, because such information is "meaningful", and "meaningful" means eavesdropping. The information sent by the source is...

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Problems solved by technology

[0004] There are many implementations of secure network coding, but these implementations still have the following problems: using cryptographic encryption to achieve network confidentiality, this method can achieve the effect of confidentiality, but the amount of encryption required is too large , a huge amount of calculation will be generated in the process of encryption and decryption; use non-encryption means to achieve confidentiality, this method needs to limit the eavesdropper's eavesdropping ability to certain links, for eavesdroppers with strong eavesdropping ability, use Confidentiality achieved by non-encrypted means may be violated

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