关键词: 多源网络编码, 离散对数, 签名算法

Abstract: It has been proved that network coding can provide significant benefits to network protocols, such as increased throughput, reduced network congestion, higher reliability, and lower power consumption. Therefore, this new technology can be wildly used in traditional computer networks, wireless sensor networks and peer-to-peer systems. However, network coding is very vulnerable pollution attacks. In recent years, many schemes have been designed to prevent this attack, but most of these schemes are only suitable for single source network, and they can not satisfy the security requirements of multi-source network coding. This paper gives a depth analysis to pollution attacks in multi-source network coding, and makes a definition of secure signature for multi-source network coding, then proposes a secure and efficient signature scheme to prevent the pollution attacks in multi-source network coding. This scheme can meet all of the secure requirements in multi-source network coding.

Key words: multi-source network coding, discrete logarithm, signature scheme