Cryptology ePrint Archive: Report 2001/049

A known plaintext attack on the ISAAC keystream generator

Marina Pudovkina

Abstract: Stream ciphers are often used in applications where high speed and low delay are a requirement. The ISAAC keystream generator is a fast software-oriented encryption algorithm. In this papers the security of the ISAAC keystream generator is investigated. Cryptanalytic algorithm is developed for a known plaintext attack where only a small segment of plaintext is assumed to be known. Keywords. ISAAC. Keystream generator. Cryptanalysis.

Category / Keywords: secret-key cryptography /

Date: received 19 Jun 2001

Contact author: maripa at online ru

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Version: 20010620:075606 (All versions of this report)

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