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http://dx.doi.org/10.13089/JKIISC.2007.17.4.53

Advanced Multi-Pass Fast Correlation Attack on Stream Ciphers  

Kim, Hyun (Korea Information Security Agency(KISA))
Sung, Jae-Chul (University of Seoul)
Lee, Sang-Jin (Center for Information Security Technologies(CIST))
Park, Hae-Ryong (Korea Information Security Agency(KISA))
Chun, Kil-Soo (Korea Information Security Agency(KISA))
Hong, Seok-Hie (Center for Information Security Technologies(CIST))
Publication Information
Journal of the Korea Institute of Information Security & Cryptology / v.17, no.4, 2007 , pp. 53-60 More about this Journal
Abstract
In a known plaintext scenario, fast correlation attack is very powerful attack on stream ciphers. Most of fast correlation attacks consider the cryptographic problem as the suitable decoding problem. In this paper, we introduce advanced multi-pass fast correlation attack which is based on the fast correlation attack, which uses parity check equation and Fast Walsh Transform, proposed by Chose et al. and the Multi-pass fast correlation attack proposed by Zhang et al. We guess some bits of initial states of the target LFSR with the same method as previously proposed methods, but we can get one more bits at each passes and we will recover the initial states more efficiently.
Keywords
Stream cipher; Fast correlation attack; LFSR(Linear feedback shift register); Parity-check eqaution;
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