cilly

Definitions

Any predictable facet of the Enigma Machine cipher due to operator error or laziness, whose existence helped the Allies to break the code.

historical

Equivalents

Examples

“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.”

“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.”

CEFR level