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BOMBA
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Mechanical machine, developed by the Polish Cipher Bureau prior to WWII,
to aid in the (partly) automated breaking of Enigma messages.
Based on the double enciphering of the message indicator.
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BOMBE
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Mechanical machine, developed by the British codebreakers of
CG&CS during WWII, to aid in the (partly) automated breaking of
Enigma messages. Based on the occurence of certain 'loops' in
the ciphertext.
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BP
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Bletchley Park
An estate in the town of Bletchley (UK) that was the UK's main
code breaking site during WWII. It is here where, amongst others,
the German Enigma codes were broken.
(More...)
(Wikipedia)
(Website)
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Cillies
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BP expression for silly German (Enigma) operator mistakes that could lead
to recovery of the message key. Common mistakes were, for example, the use of
the name of the operator's girlfriend as the message key, or simply three
adjacent keys on the keyboard.
(Wikipedia)
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Cipher
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The algorithm used for the encryption and/or decryption of information.
In common language, 'cipher' is also used to refer to an encryption message,
also known as 'code'.
(Wikipedia)
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Colossus
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First programmable digital electronic computer built with more than 1700 valves.
Used at BP to break the German Lorenz SZ-42 cipher machine.
(Wikipedia)
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Crib
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Known or suspected part of the plain text
(Wikipedia)
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Crypto
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 Cryptography
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Cryptography
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Common expression to refer to cryptographic equipment (cipher machines)
and/or the process of encrypting and decrypting information.
(Wikipedia)
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GC&CS
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Government Code and Cypher School
British code breaking organisation during WWII.
Now called GCHQ.
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GCHQ
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Government Communications Headquarters
British intelligence agency.
(More...)
(Website)
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ISK
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Intelligence Service Knox
Also known as Illicit Services Knox. During WWII, ISK was a special section at
Bletchley Park (BP)
where the Enigma cipher of the German Abwehr
was broken. The section was led by codebreaker
Dilly Knox and was established after breaking
the Enigma G in October 1941. After Knox died in
February 1943, Peter Twinn became in charge.
By the end of the war, ISK had intercepted and decrypted 140,800
Abwehr messages.
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ISOS
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Intelligence Services Oliver Strachey
Also known as Illicit Services Oliver Strachey.
During WWII, ISOS was a special section at Bletchley Park (BP)
where the hand ciphers of the German Secret Service were broken
and where the intelligence derived from the broken messages was handled.
The section was led by Oliver Strachey.
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Key
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A key is a piece of information (parameter) that determines the functional
output of a cryptographic algorithm (cipher).
Without the key, the algorithm can not be used.
(Wikipedia)
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