Quoting Jordi Espasa Clofent <jespasac at gmail.com>: > >> Have you tried gzip or bzip? > Yes. But both of them doesn't support encryption. Unless something changed in recent years, "encryption" in ZIP files is trivial to break. As alternative to ZIP, you can always "tar xzf - infile1 infile2 infile3 | gpg -e -r blah at foobar.com > outfile.tar.gz.gpg" and have both decent comperssion and decent encryption. Or if you don't want or can't use public keys (say recipient doesn't have one), you could use "gpg -c" instead of "gpg -e" to have thing encrypted with symetric cypher using passphrase. This will be similar to the way ZIP works, but harder to break if good passphrase is choosen.