Encrypt/Decrypt messages with gpg
Now you can find little tools on https://www.wittnet.org to allow the encryption and decryption of a simple text. These tools are very handy as you can paste the generated text-output to any other program or use it to send it as mail.
Encryption/decryption is done by gpg, this is a standard so it’s easy to use this in combination with other apps.
Here is the direct-link to both posts