[Cryptography] Summary: compression before encryption

Albert Puigsech Galicia albert at puigsech.com
Tue Jan 13 19:41:23 EST 2015

> > Another respondent (albert at puigsech.com) argued that
> > Encrypt-then-Compress was also an option ("has its pros")
> Compression after encryption is nonsense. Under any modern definition of
> "secure", a secure cipher's output is computationally indistinguishable
> from random noise, which is not compressible.


what I tried to reflect is that compress after encrypting only have an
effect on some cypher systems. For example for ECB. And It's because the
absence of entropy.

Albert Puigsech Galicia
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