关键词: 窃听者, 组播网络, 秘密共享, 安全性, 网络编码

Abstract: Inspired by the cryptography method of confidential communication and the idea of secret shcaring, the authors proposed a secure communication scheme suitable to the wiretap network that employed network coding for data transmission. The proposed scheme used the original random bits to generate a new random bit string for enrypting the source messages, and then mixed the original random bit string with a secret string which was generated by the obtianed ciphertexts. Lastly, efficient use of network capacity with randong linear network coding was achieved. What's more, our scheme neither resorted to a secret channel which transmited the secret key to sinks, nor constucted linear network coding to meet special conditions which depended on network topology.

Key words: wiretapper, multicast network, secret sharing, security, network coding