How to edit GPG key?

by | Feb 27, 2017 | Data Security, Encryption, PGP and GPG, Privacy

When a user generates a GPG public-private key pair, some information is stored along with the key-id. Using the –edit-key option, one can edit the information stored with the key. (How to generate a GPG key pair?)

How to add or delete key components of a GPG key?

To add or delete key components like uid, subkey, etc., type the following lines in the command line:

# gpg --edit-key <key>


It will display information about the key and come to the command prompt.

  • Use the command adduid to add a user-uid.
  • Use the command addkey to create a subkey under your key.
  • Use the command deluid to delete selected user-ids from your key.
  • Use the command delkey to delete selected subkeys from your key.

When you add a user-id or subkey, it is self-signed with your master key. So, you would need to give your passphrase along with these commands.

How to revoke key components of a GPG key?

To revoke a subkey, use the revkey command.

# gpg --edit-key [email protected]
command> list
command> key 1
command> revkey


To revoke a signature on a key, use the revsig command.

# gpg --edit-key [email protected]
command> revsig

How to update the expiration time of a GPG key?

You can also update the expiration time of your selected GPG key using …

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Amrita Mitra

Author

Ms. Amrita Mitra is an author, who has authored the books “Cryptography And Public Key Infrastructure“, “Web Application Vulnerabilities And Prevention“, “A Guide To Cyber Security” and “Phishing: Detection, Analysis And Prevention“. She is also the founder of Asigosec Technologies, the company that owns The Security Buddy.

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