cilly
Noun
Any predictable facet of the Enigma Machine cipher due to operator error or laziness.
Usage- Historical
- Examples
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Another type of cilly was the repeated use of the same message key, perhaps the initials of the operator's girlfriend […]
Answer c is a reference to a cilly, which was a three-character message key used in the German Enigma machine.
More examples (3)
Taunt describes the work involved in breaking Enigma messages, cribs, cillies, the Herivel tip, help from Bombes and more.
By 1944, cillies had already become rare; hence, Bletchley Park had already found other breaks into the Enigma nets.
Cillies resulted from a combination of two different mistakes in a multi-part message by some Enigma operators.
Word forms
cillies