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The following archive was created by hippie-mail 7.98617-22 on Thu May 27 1999 - 23:44:21
Keith Lockstone (klockstone@cix.co.uk)
Wed, 7 Apr 1999 21:54 +0100 (BST)
Read the original version of Kahn's 'The Codebreakers', page 394 onwards.
Vernam seems to have discovered the XOR combiner in late 1917 - but his
original system used a loop of tape with random numbers punched into it as
the keystream. Later versions combined 2 or 3 tapes to provide much larger
sequences. These, although stronger, were subject to statistical attacks
in a similar fashion to the WWII Siemens and Lorentz machines.
Joseph Mauborgne is credited with its development into the One-Time Pad
system in 1918.
Keith.
The following archive was created by hippie-mail 7.98617-22 on Thu May 27 1999 - 23:44:21