Try it for yourself. Encrypt /dev/zero in some key using AES, then compress it with whatever compressor you like. Try it many times. Let us know how it goes!

Try it for yourself. Encrypt /dev/zero in some key using AES, then compress it with whatever compressor you like. Try it many times. Let us know how it goes! And, yes, you can compress specific pseudo-random looking symbols, but only a few. We're talking about arbitrary pseudo-random data, and that will not compress.