I don't want forward secrecy for my email. I actually want to keep my archived emails for an indefinite period. PGP allows me to do this in relative safety, the

I don't want forward secrecy for my email. I actually want to keep my archived emails for an indefinite period. PGP allows me to do this in relative safety, the email is encrypted once at creation time an then stays encrypted. In general, forward secrecy does not work for the case where someone keeps the message. If the attacker can own a user well enough to get their secret key material, they will also get any messages that user still has access to. Things might be different for a relatively insecure medium like IM but the same principle applies. Most IM users keep their old messages around thus negating the value of forward secrecy. >For email or IM we don't want non-repudiation a lot of the time. We might not, but the people we send our messages to will want to prove we sent it. Otherwise you open yourself to harassment and general abuse. If you don't want to sign your emails then you don't have to. Deniability through claimed forgery doesn't really work anyway: * https://articles.59.ca/doku.php?id=pgpfan:repudiability https://articles.59.ca/doku.php?id=pgpfan:repudiability