Gnu Privacy Guard
Gnu Privacy Guard is GNU project's complete and free implementation of the OpenPGP standard. you can:
- Encrypt and Decrypt files
- Signing and Checking signatures
EasyPG is an all-in-one GnuPG interface for Emacs. It consists of two parts: EasyPG Assistant and EasyPG Library.
- EasyPG Assistant is a set of convenient tools to use GnuPG from Emacs.
- EasyPG Library is a sort of an elisp port of GPGME, a wrapper library which provides API to access some of the GnuPG functions.