Age is a simple, modern and secure file encryption tool that we use at Monzo.
You can find more information about age at https://github.com/FiloSottile/age

Note: Monzo staff should check with the Security Infrastructure team before asking external parties to use these keys.

Our age public keys are:

Public key 1: age1yubikey1qwpmpz5q9ccv83ppe8tvvgux96aunp9v0ewylz9sg6azhzkxe7gqkxa039c
Public key 2: age1yubikey1qgmrjk2chvdm5akjn2avupqg8mlgdnr37hdnj6r5380k8nllj3mtqxh0n2h

To encrypt a file for us, you can use the following command and include all of our age public keys:

age --encrypt -r <pubkey_1> -r <pubkey_2> -o data.ext.age data.ext

For further usage instructions, please refer to the age documentation at https://github.com/FiloSottile/age