Encrypt all your messages send with Contact Form 7 using a pure PHP port of GNU Privacy Guard (GPG).

pgp key generator and message encryption and decryption wp plugin.

Upload a PGP public keys and use it to provide end-to-end encryption of contact forms.

This plugin provides Enigform Secure Login support for Wordpress. Works in similar way to HTTP Authentication by dwc.

Signs and encrypts emails using PGP/GPG keys or X.509 certificates. Provides OpenPGP and S/MIME functions via WordPress plugin API.