|WikiProject Cryptography / Computer science|
Meanings and abrevation of.. FER Ec/Io CAI Finger RFI
Please improve sentence structure
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Another way to increase the unicity distance is to increase the number of possible valid sequences in the files as it is read. Since if for at least the first several blocks any bit pattern can effectively be part of a valid message then the unicity distance has not been reached. This is possible on long files when certain bijective string sorting permutations are used, such as the many variants of bijective BWT transforms. — Preceding unsigned comment added by 22.214.171.124 (talk) 17:15, 11 March 2013 (UTC)
Basically the bigger the unicity distance the better. For a one time pad, given the unbounded entropy of the key space, we have U = , which is consistent with the one-time pad being theoretically unbreakable.