Cryptology ePrint Archive: Report 2005/144

Kaweichel, an Extension of Blowfish for 64-Bit Architectures

Dieter Schmidt

Abstract: In this paper, the block cipher Kaweichel is presented. It is an extension of Blowfish for 64-bit architectures. The aim is to use the commonplace instructions of modern microprocessors. A main objective was to harden against known attacks on Blowfish. The author does not claim intellectual property on Kaweichel and the cipher will remain unpatented. A C reference implementation is available on the web.

Category / Keywords: secret-key cryptography / block ciphers, Blowfish

Date: received 16 May 2005, last revised 2 Oct 2006

Contact author: dieterschmidt at usa com

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Version: 20061002:122238 (All versions of this report)

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