[Cryptography] Is there a good algorithm providing both compression and encryption at the same time?

[Peter Gutmann]

Bill Frantz <frantz at pwpconsult.com> writes:

>Probably compression is safe if each source of data is compressed separately.

It's also safe if used in non-interactive environments (e.g. store-and-forward
messaging).  One of the major drivers for compression in CMS was EDI use,
where messages are (a) enormous, (b) highly compressible, and (c) chosen-
plaintext attacks aren't an issue.

Peter.