An Encryption Method for BAN Using the Channel Characteristics

The protection of information security is a very important technique requirement in Body area networks (BANs). According to the limitation of energy, the traditional encryption methods which adopt the complex algorithm and the large consumption are not suitable for BANs. This paper proposes a new encryption method based on the channel model of BANs, which adopts the path loss from the BAN systems to form the initial key, utilizes the LFSR (Linear Feedback Shift Register) circuit to generate the key stream, and then encrypts the data in the coordinator of the BAN system. This new encryption method has the advantages of low energy consumption, simple hardware implementation, and dynamic key updating.

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