关键词: A5/1算法, 初始化, 相关分析

Abstract:

On the basis of introduction of A5/1 linear initiation weakness, by the characteristic of non-balance output in inter-clocking mechanism based on majority logic is analyzed, and the correlation attack weakness is discussed. Meanwhile, that thrown-out of original 100 bits output in A5/1 algorithm that can not approve its security is pointed out. For such weakness, inter-clocking mechanism is extended to the originate process of A5/1 to eliminate such weakness. It is concluded that A5/1 algorithm is safe under such attacks.

Key words: A5/1 algorithm, initialization, correlation analysis