证明 首先构造一个与赢得完全可追踪性game的算法A交互的框架。给定生成元为??g??1的群G??1,ω= g??γ??2∈G??2 以及所有的(A??i,x??i) 1≤i≤n。 对每一个i ,要么x??i = * ,表示A??i所对应的x??i未知 要么(A??i,x??i)??是SDH对 满足??e(A??i ,ωg???x??i???2 ) ...
IND-CCA security stands for Indistinguishable Chosen Ciphertext Attack. The idea behind it is that in a secure encryption scheme, given a ciphertext, an adversary should not be able to tell what message the given ciphertext encrypts. In this model, the adversary is allowed to call the encryp...
Since then, several cryptanalysis of EPOC have been published, one in the Chosen Ciphertext Attack game and others making use of a poor implementation that is vulnerable to reject timing attacks. 展开 DOI: http://dx.doi.org/ 被引量: 11 ...