Collaboration and Collation: Breaking German diplomatic ciphers in 1942

dc.contributor.author	Turing, Dermot
dc.contributor.editor	Desenclos, Camille
dc.contributor.editor	Pierrot, Cécile
dc.date.accessioned	2026-06-15T10:12:01Z
dc.date.available	2026-06-15T10:12:01Z
dc.date.issued	2026-06-22
dc.description.abstract	German diplomatic signals enciphered in the Floradora double-additive system were broken at the end of 1942 as a result of Anglo-American collaboration. The American contribution was a novel and ingenious system of machine search for likely additive combinations, which allowed the choice of additives to be revealed. The paper suggests a reconstruction of the machine methodology, which used punched-card sorting and collation.
dc.identifier.issn	1736- 6305
dc.identifier.uri	https://hdl.handle.net/10062/122068
dc.language.iso	en
dc.publisher	Tartu University Library
dc.relation.ispartofseries	NEALT Proceedings Series Number 61
dc.rights	Attribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/
dc.subject	Floradora cipher
dc.subject	Superenciphered code
dc.subject	Punched-card machine codebreaking
dc.subject	Bletchley Park
dc.title	Collaboration and Collation: Breaking German diplomatic ciphers in 1942
dc.type	Article

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