抗污染攻击的自适应网络编码传输机制

研究了网络编码中的污染攻击问题，提出了一种抗污染攻击的自适应网络编码传输机制ASNC (adaptive secure network coding)。在编码数据分组的传输过程中，该机制利用网络编码的时间和空间特性有效控制污染数据分组的传播。同时，ASNC机制创新性地促使网络编码系统动态调整安全策略，自适应于当前网络安全态势。此外，为了达到更好的实用性，ASNC机制有效利用网络编码的编码空间特性，不需要额外的安全数据通道和数据分组加密操作。ASNC机制的安全分析和仿真结果表明，其能够有效抵抗污染攻击，与不具有自适应能力的机制相比具有更好的安全效率。

Adaptive secure network coding scheme against pollution attacks

The problem of pullution attacks was focused on and ASNC (adaptive secure network coding) scheme was proposed, which is an adaptive security scheme against pollution attacks in network coding systems. The proposed scheme allows participating nodes to detect polluted packets based on time and space properties of network coding. It is an innovative security scheme which can dynamically adjust the authentication strategy of participating nodes according to the security situation. In addition, ASNC scheme provides an efficient packet authentication without requiring the existence of any extra secure channels. Security analysis and simulation of the scheme were also presented and the results demonstrate the practicality and efficiency of the ASNC scheme.