Reply to post: Cribs from touch

WWII Bombe operator Ruth Bourne: I'd never heard of Enigma until long after the war

a_builder

Cribs from touch

"I think I read somewhere that elements of "personalisation" in the source messages did come into it. Each operator had their own keying style, so the interceptors knew who it came from, and certain operators would have little quirks in their message content."

Yes this was used to generate individual cribs:-

- Operators sending messages to be passed on to girlfriends etc

- Standard form test messages that they were too lazy to alter as they were meant to.

- Returned test messages to check for clarity of transmission and retransmission

- Requisitions of stores and stocks were another good one. If you got a message from a fuel dump they would report stock levels periodically at a known time each week etc.

- And the well known weather and HH (I don't even want to type those two words) cribs

And the list get pretty big but one you know the 'touch' of the operator you could look for a likely crib in the decrypts.

Obviously you focus on the operators who spew out cribs with standard form messages at known times.

POST COMMENT House rules

Not a member of The Register? Create a new account here.

  • Enter your comment

  • Add an icon

Anonymous cowards cannot choose their icon

Biting the hand that feeds IT © 1998–2019