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  2. MI400
  3. March 2002

Re: MI a good use for encryption?

From: Phil <sublime78ska@yahoo.com>
> How do you unencrpyt the data?  How do you keep the encrypted value from
> always being the same for the same text

in short: you use a "chaining" technique where each block
of data is xor'ed with the previous encrypted block before
being encrypted. For the first block you can use anything
you like (e.g. filename or current date). This first block
must vary from message to message, but need not be
secret.

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