Real Time Cryptanalysis of the Alleged A5/1 on a PC (Preliminary Draft)


Published: Apr 04, 2000 Updated: Apr 04, 2000 Section: Network Security Library :: Cryptography Author: Alex Biryukov Printable Version Adjust font size: Rating: 3.3/5 - 10 Votes 1 2 3 4 5

A5/1 is the strong version of the encryption algorithm used by about 100 million GSM customers in Europe to protect the over-the-air privacy of their cellular voice and data communication. The best published attacks against it require between 2^40 and 2^45 steps. This level of security makes it vulnerable to hardware-based attacks by large organizations, but not to software-based attacks on multiple targets by hackers.

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