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Title:
A NEW GUESS-AND-DETERMINE ATTACK ON THE A5/1 STREAM CIPHER
Authors: Jay Shah, Ayan Mahalanobis
Abstract:In Europe and North America, the most widely used stream cipher to ensure privacy and confidentiality of conversations in GSM mobile phones is the A5/1. In this paper, we present a new attack on the A5/1 stream cipher with an average time complexity of 2^(48.5), which is much less than the brute-force attack with a complexity of 2^(64) . The attack has a 100\% success rate and requires about 5.65GB storage. We provide a detailed description of our new attack along with its implementation and results.
ePrint: https://eprint.iacr.org/2012/208
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