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

摘要： 受传统密码学中保密通信方法和秘密共享思想的启发,构造了一个适用于使用网络编码进行数据传输的窃听网络中的安全通信方案。该方案利用原始随机比特串生成新随机比特串来加密信源消息数据,再由得到的密文生成一秘密数据串来混合原始随机比特串,最后利用随机线性网络编码实现对网络容量的高效利用。而且,该方案没有使用秘密信道传输密钥,也没有为实现安全通信而构造依赖网络拓扑结构、满足特殊条件的网络编码。

关键词: 窃听者, 组播网络, 秘密共享, 安全性, 网络编码