CNM supports the OpenPGP encryption standard. Two popular software packages that comply with OpenPGP are PGP (from PGP Corporation) and GnuPG (Gnu Privacy Guard or GPG). In addition there are many other less-common packages that implement OpenPGP. OpenPGP is a public key encryption methodology that requires the exchange of public keys. Therefore, some minor setup is required before files can be encrypted.
Pretty Good Privacy (PGP) is a computer program that provides cryptographic privacy and authentication. PGP is often used for signing, encrypting and decrypting e-mails to increase the security of e-mail communications. It was created by Philip Zimmermann in 1991.
PGP and similar products follow the OpenPGP standard (RFC 4880) for encrypting and decrypting data.