I have been playing around with passwords on 7.2.3. So far what I
have noticed is that password are either sent via tcp/ip as clear text ()
or, encrypted using "crypt" and "md5". Are the anymore more encryption
methods suppored like "sha"? And, when passwords are stored as encrypted,
what is used to encrypt them? Does "pg_passwd" app use the same encryption
as that used when the passwords are store internally?