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Re: compression before encryption
> ...but in fact the compression increases the encryption scheme, because
> it reduces the redondancy of the plain text which is so usefull for
> cryptanalysis.
> did i miss something ?
I haven't looked at IPCOMP yet, but many compression schemes are a very
mixed bag in this regard: they reduce the overall redundancy of the bulk
text, but they often put semi-predictable header material on the front,
which can facilitate known-plaintext attacks.
Henry Spencer
henry@spsystems.net
(henry@zoo.toronto.edu)
References: