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PGP

PGP Stands for Pretty Good Privacy and gpg is the Linux program that implements the standard

Basics of PGP

Use GPG on linux

gpg --help

source

https://unix.stackexchange.com/questions/339077/set-default-key-in-gpg-for-signing

List keys

# List public keys you have stored (yours and other people's keys)
gpg --list-keys

# List private keys (generally only your own)
gpg --list-secret-keys

Generate a key

gpg --gen-key

Backup a private key

gpg --list-secret-keys

# Replace XXXXXXXX with your hexadecimal key ID
gpg --export-secret-keys --armor XXXXXXXX > ./my-priv-gpg-key.asc

# Omitting the --armor flag will give you binary output instead of ASCII
# which would result in a slightly smaller file but the ASCII
# formatted (armored) can be printed physically, is human readable,
# and transfered digitally easier.
# Both formats can be imported back in to GPG later

Restore private key

gpg --import ./my-priv-gpg-key.asc

Sign something

Encrypt something for someone else

gpg  --sign --armor --recipient paulmullins@protonmail.com --encrypt message.txt

# --output File.gpg

Decrypt something from someone else

gpg -d EncryptedFile.asc

Delete keys

# Private keys
gpg --delete-secret-keys XXXXXXXX

# Public keys
gpg --delete-keys XXXXXXXX

Learning PGP

  • Create a pgp key

    • gpg --gen-key
    • gpg --full-generate-key

    • Export ones public key

    • gpg --export person@email.com > pubkey.gpg

    • gpg --armor --export person@email.com > pubkey.gpg

    • Create the revocation certificate

    • gpg --gen-revoke person@email.com

    • --armor

    • exports to text

    • List keys

    • gpg --list-keys

    • How to import a pgp key

    • gpg --import someonesgpgkey.asc

    • .asc for text encoded, .gpg for binary files

    • .asc when using --armored uses ascii

    • How to get a gpg key

    • gpg --fingerprint uid

    • gpg --recv-keys 00xABCDEFGH
    • gpg --import pubkey.gpg

    • gpg --list-sigs

    • List keys with signitures

    • gpg --delete-key uid

  • xxd, a hex viewer

  • file, a linux command for telling you what kind of file a file is

  • What is gpg-agent

  • Youtube Video Source