Towards Exploring Fundamental Limits of System-Specific Cryptanalysis Within Limited Attack Classes: Application to ABSG

Autor:	Altug, Yucel, Mihcak, M. Kivanc
Rok vydání:	2008
Předmět:	Computer Science - Cryptography and Security Computer Science - Information Theory
Druh dokumentu:	Working Paper
Popis:	A new approach on cryptanalysis is proposed where the goal is to explore the fundamental limits of a specific class of attacks against a particular cryptosystem. As a first step, the approach is applied on ABSG, which is an LFSR-based stream cipher where irregular decimation techniques are utilized. Consequently, under some mild assumptions, which are common in cryptanalysis, the tight lower bounds on the algorithmic complexity of successful Query-Based Key-Recovery attacks are derived for two different setups of practical interest. The proofs rely on the concept of ``typicality'' of information theory. Comment: 30 pages, Submitted to IEEE Transactions on Information Theory
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0805.0268 Zobrazit plný text záznamu View this record from Arxiv