一种防主动攻击保密增强的实现

Implementation of Privacy Amplification Secure Against Active Adversaries

本文提出了一种协议:用通信双方所共享的部分保密的信息对公开信道上的消息进行认证,因而用这种协议所实现的保密增强能够以一定的概率防止敌手的主动攻击.最后分析了这种协议中的数据分块大小与主动攻击成功概率之间的关系。

This paper proposes a protocol that enables communication over public channel to be authenticated by the partially secret common information between the two parties,and makes privacy amplification secure against active adversaries with some probability.At last,the relationship between the block size and the success probability of active attack is analyzed and a lower bound on size of bits of the common string needed to implement privacy amplification is given.