Security Analysis of a Variant of Self-Shrinking Generator

Dong Hoon LEE  Je Hong PARK  Jae Woo HAN  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E91-A   No.7   pp.1824-1827
Publication Date: 2008/07/01
Online ISSN: 1745-1337
DOI: 10.1093/ietfec/e91-a.7.1824
Print ISSN: 0916-8508
Type of Manuscript: LETTER
Category: Cryptography and Information Security
stream cipher,  LFSR,  self-shrinking generator,  guess-and-determine attack,  

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A variant of the self-shrinking generator (SSG) proposed at ICISC 2006, which we call SSG-XOR, was claimed to have better cryptographic properties than SSG in a practical setting. It was also claimed that SSG-XOR will be more secure than SSG. But we show that SSG-XOR has no advantage over SSG from the viewpoint of practical cryptanalysis, especially the guess-and-determine attack.