Sub Keys versus Session Keys

David Livingstone
Wed Mar 20 18:01:02 2002

The textbooks (e.g. William Stalling's Cryptography & Network Security, 2nded, page 359) refer to PGP using one-time session keys to encrypt messages.

GnuPG seems to use subkeys to encrypt messages instead (see GNU Privacy
Handbook, page 23).

Is this a difference between PGP and GnuPG, or due to using ElGamal instead
of RSA, or what ?

David Livingstone