Improvement of A5/1 algorithm against correlation attack
Xinxin Niu · Journal of Xi'an University of Post and Telecommunications · 2006
The A5/1 key-streams can be easily distinguished from the random sequences,or even the A5/1 keys can be recovered, because of the known weakness of the A5/1 algorithm. A new improved A5/1 algorithm is presented to wall up the weakness and increase security.