Design and Strength of a Feasible Electronic Ciphermachine from the 1970s

Jaap van Tuyll
Retired cryptanalyst, The Netherlands

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Ingår i: Proceedings of the 1st International Conference on Historical Cryptology HistoCrypt 2018

Linköping Electronic Conference Proceedings 149:27, s. 153-158

NEALT Proceedings Series 34:27, p. 153-158

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Publicerad: 2018-06-13

ISBN: 978-91-7685-252-1

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


This paper explores the design and strength of a feasible electronic ciphermachine that might have been invented in the 1970’s. The design uses linear feedback shift registers, to get a key generator that satisfies some necessary requirements for a secure cryptographic algorithm. The analysis of the strength however, shows that the algorithm can be attacked successfully.


Inga nyckelord är tillgängliga


Solomon W. Golomb. 1967. Shift Register Sequences. Holden–Day.

Auguste Kerckhoffs. 1883. La cryptografie militaire. Journal des Sciences Militaires, IX:5–38, jan.

Willi Meier and Othmar Staffelbach. 1989. Fast Correlation Attacks on certain Stream Ciphers. Journal of Cryptology, 1(3):159–176.

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