高效自适应的抗污染攻击网络编码传输方案

Efficient and adaptive network coding transmission scheme against pollution resistance

针对中间节点对收到的所有编码包进行验证浪费网络资源和目的节点解码速率慢等问题进行研究,提出一种高效自适应的抗污染攻击网络编码传输方案-EANC(efficient and adaptive network coding transmission scheme against pollution attack)。EANC方案在数据分组编码阶段,利用按照网络编码的时间和空间特性构造的线性子空间签名方案准确地验证数据分组是否被污染从而有效控制污染数据分组的传播,并且能使中间节点调节验证步骤使之自适应于当前网络的污染程度,从而提高验证效率;在目的节点解码阶段,EANC方案利用目的节点重传恢复机制降低解码恢复时延。仿真结果表明,EANC方案能够减少子空间的签名长度并且降低目的节点解码恢复的平均时延。

In order to solve the problem that intermediate node verifies all the encoded packets wasting the network resources and the slow decoding rate of the destination node,this paper proposed an efficient and adaptive network coding transmission scheme which called EANC.In data packet encoding stage,EANC scheme used network encoding time and space characteristics to structure linear subspace signature scheme,the scheme was accurate verification of data packets effectively and control the spread of pollution data packets,EANC scheme could make the middle nodes adjust detection step adapt to the current network pollution level and improved verification efficiency;at the destination node decoding stage,EANC scheme used the destination node packet loss retransmission mechanism to reduce the decoding delay.The simulation results show that the EANC scheme can reduce the time of the linear subspace signature and reduce the average time delay of the decoding and recovery of the destination node.