Algoritmi
Una coppia chiave pubblica/chiave privata può essere usata per la crittografia e/o la firma digitale, a seconda dell'algoritmo.
$gpg --version
gpg (GnuPG) 1.2.3 Copyright (C) 2003 Free Software Foundation, Inc. This program comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under certain conditions. See the file COPYING for details. Home: ~/.gnupg Supported algorithms: Pubkey: RSA, RSA-E, RSA-S, ELG-E, DSA, ELG Cipher: 3DES, CAST5, BLOWFISH, AES, AES192, AES256, TWOFISH Hash: MD5, SHA1, RIPEMD160, SHA256 Compression: Uncompressed, ZIP, ZLIB