8 Jul
2003
8 Jul
'03
11:35 p.m.
Is it possible to do this with a fixed length key?
Such a thing exists, it is called a one-time pad.
Generate a
completely random key as long as the plaintext, and then XOR each
successive bit of the key with the corresponding bit of the plaintext.
The result is indistinguishable from random noise; only someone with
an identical copy of the key can decrypt it (using precisely the same
method of course).
--Mirian
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