I am looking for a way to generate an "insecure" public key pair. and by insecure I actually mean a pair that is breakable using brute-force (or other encryption) methods.
As far as I know PGP started with 128bit-keys. and at this point I can only find tools to generate keys using 1024bit or more.
Is there a way to generate a key pair with lets say 56bit (or even less) that will still generate a valid Certificate than can be used in PGP messages?