is AES key random?

Question

AES key may be generate by this code

KeyGenerator kgen = KeyGenerator.getInstance(\"AES\");
kgen.init(128); 

but

If I have a \"very re

Answer 1

It sounds like you're trying to generate an AES key based on a password.

If this is the case, you can use javax.crypto.SecretKeyFactory's generateSecret method, passing in a javax.crypto.spec.PBEKeySpec as the parameter. The PBEKeySpec allows to to specify the password as an argument to its constructor.