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Contents:
  1. GPG: The Gnu Privacy Guard encryption standard.
    1. Working with GPG
      1. Setup and Configuration
      2. Basic Operations
      3. Further info
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GPG: The Gnu Privacy Guard encryption standard.

It does pretty cool shit.

It started off as a completely free and open source implementation of the PGP standard, but has diverged significantly recently to make it no long 100% compatible with PGP.

GnuPG is a hybrid-encryption software program because it uses a combination of conventional symmetric-key cryptography for speed, and public-key cryptography for ease of secure key exchange, typically by using the recipient’s public key to encrypt a session key which is used only once.

Working with GPG

It is one of those thing every developer should be able to do, but they do not use it often enough to completely memorize how to do everything.

Setup and Configuration

The default directory for gpg is ~/.gnupg. This can be overwritten with the --homedir flag or the $GNUPGHOME environement variable.

Add these two lines to either ~/.gnupg/gpg.conf for user level or /etc/gnupg/gpg.conf for system level.

no-default-keyring
keyring keyring-path

Basic Operations

All operations with gpg begin with the gpg command followed by a flag that indicates the desired operation.

Flag(s) Operation Notes
--full-gen-key Create a new GPG Key Interactive Prompt.
--export --armor --output "$KEYFILE" "$USERID" Exports GPG key to “$KEYFILE”  
--import "$KEYFILE" Imports GPG key into key ring.  
--list-keys list keys in public keyring  
--list-secret-keys list keys in secret keyring.  

To create a new key simply use gpg --full-gen-key.

Further info