V.V. Zyablov, V.G. Potapov, V.R. Sidorenko

Data protection in a network from both channel errors and unauthorized access using one code

A communication star-network with a central station and users is considered. Transmission over noisy channels from the central station to users and back uses error-correcting coding. Typically, the error-correcting code is open to the world (it is not a secret). This allows an illegal user to gain unauthorized access to the transmitted data. We propose modifying the code and the transmission protocol to protect the network from channel errors and unauthorized access using the same code. The modified network assumes that every user has a secret key, also known to the central station.

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