Здравствуйте, alexanderad, Вы писали:

A>Желательно для *nix.
openpgp

About OpenPGP
OpenPGP is a non-proprietary protocol for encrypting email using public key cryptography. It is based on PGP as originally developed by Phil Zimmermann. The OpenPGP protocol defines standard formats for encrypted messages, signatures, and certificates for exchanging public keys.