Command line tool used for encryption
GnuPG is the GNU project's complete and free implementation of the OpenPGP standard as defined by RFC4880. GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. GnuPG, also known as GPG, is a commandline tool without any graphical stuff. It is the real crypto engine which can be used directly from a command prompt, from shell scripts or by other programs. Therefore it can be considered as a backend for other applications.
However, even when used on the command line it provides all functionality needed - this includes an interactive menu system. The set of commands of this tool will always be a superset of those provided by any front ends.
- Full replacement of PGP
- Does not use any patented algorithms
- GPLed, written from scratch
- Can be used as a filter program
- Full OpenPGP implementation
- Better functionality than PGP and some security enhancements over PGP 2
- Decrypts and verifies PGP 5, 6 and 7 messages
- Easy implementation of new algorithms using extension modules
- The User ID is forced to be in a standard format
- Supports key and signature expiration dates
- Online help system
- Optional anonymous message receivers
- Integrated support for HKP keyservers (wwwkeys.pgp.net)
- Clears signed patch files which can still be processed by patch
- Supports ElGamal, DSA, RSA, AES, 3DES, Blowfish, Twofish, CAST5, MD5, SHA-1, RIPE-MD-160 and TIGER
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