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Improved Cryptanalysis of Polar Bear
Zaeim Electronic Industries Company, Tehran, Iran.
Zaeim Electronic Industries Company, Tehran, Iran.
Zaeim Electronic Industries Company, Tehran, Iran.
2006 (English)Conference paper, Published paper (Refereed)
Abstract [en]

In this paper we propose a Guess-and-Determine based initial state recovery attack on Polar Bear, one of the ECRYPT stream cipher project candi-dates. The computational complexity and success probability of our attack are O(231) and 2-26.4 respectively. Our attack can be considered as one with compu-tational complexity of O(257.4) which is much better than the attack recently proposed by J. Mattsson with computational complexity of O(279).

Place, publisher, year, edition, pages
2006. 154-160 p.
Keyword [en]
Stream Cipher, Guess-and-Determine Attack, Polar Bear, ECRYPT, Security Evaluation.
National Category
Computer Science
Identifiers
URN: urn:nbn:se:kth:diva-71073OAI: oai:DiVA.org:kth-71073DiVA: diva2:486495
Conference
In State of Art of Stream Ciphers (SASC’06)
Note
QC 20120201Available from: 2012-01-30 Created: 2012-01-30 Last updated: 2012-02-01Bibliographically approved

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