gnupg: Invoking GPG

 
 4 Invoking GPG
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 'gpg' is the OpenPGP part of the GNU Privacy Guard (GnuPG). It is a tool
 to provide digital encryption and signing services using the OpenPGP
 standard.  'gpg' features complete key management and all the bells and
 whistles you would expect from a full OpenPGP implementation.
 
    There are two main versions of GnuPG: GnuPG 1.x and GnuPG 2.x.  GnuPG
 2.x supports modern encryption algorithms and thus should be preferred
 over GnuPG 1.x.  You only need to use GnuPG 1.x if your platform doesn't
 support GnuPG 2.x, or you need support for some features that GnuPG 2.x
 has deprecated, e.g., decrypting data created with PGP-2 keys.
 
    If you are looking for version 1 of GnuPG, you may find that version
 installed under the name 'gpg1'.
 
    ⇒Option Index, for an index to 'gpg''s commands and options.
 

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