The default key type is DSA and El Gamal. But RSA appears to be more compatible with PGP (not sure). What are the benefits of either one? What is the recommended key size? From the GnuPG FAQ: I will only be using Enigmail/GPG for email encryption and signing, not file encryption (except for attachments). So if you use DSA for the key pair, greater than 1024 bits key size is a weakness? What about if you use RSA? Is a key size greater than 1024 bits a weakness? Asymmetric encryption usually benefits from having bigger key sizes. It doesn't make sense.