Cryptology ePrint Archive: Report 2015/661

Cryptanalysis of a modern rotor machine in a multicast setting

Shane Kepley and David Russo and Rainer Steinwandt

Abstract: At FSE '93, Anderson presented a modern byte-oriented ro- tor machine that is suitable for fast software implementation. Building on a combination of chosen ciphertexts and chosen plaintexts, we show that in a setting with multiple recipients the recovery of an (equivalent) secret key can be feasible within minutes in a standard computer algebra system.

Category / Keywords: cryptographic protocols / cryptanalysis, stream cipher, rotor machine

Date: received 1 Jul 2015

Contact author: skepley at fau edu

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Version: 20150702:080630 (All versions of this report)

Short URL: ia.cr/2015/661

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