killchain-compendium/Cryptography/GPG-Cheatsheet.md

GPG Cheatsheet

Generate Keypair

• Generating a keypair via gpg

gpg --gen-key

Encryption via GPG

• Encryption of a file via gpg

gpg --symmetric --cipher-algo <algorithm> $PLAIN_TEXT

Armored Encryption via GPG

• ASCII armored encryption output is done via

gpg --armor --symmetric --cipher-algo <algorithm> $PLAIN_TEXT

Decryption via GPG

• Decryption of a file via gpg

gpg --output original_message.txt --decrypt $CIPHER

Encrypt & Sign an eMail

• Encryption and siging via gpg is done in the following way

gpg --encrypt --sign --armor -r bill.gates@microsoft.com  message.txt