pretty Easy privacy (p≡p or pEp) was a pluggable data encryption and verification system that provided automatic cryptographic key management through a set of libraries for written digital communications.

It existed as a plugin for Microsoft Outlook[1] and Mozilla Thunderbird[2] as well as a mobile app for Android[3][4] and iOS.

p≡p did not depend on any specific platform, message transport system (SMS, email, XMPP, etc.

[8] Enigmail announced its support for the new "pretty Easy privacy" (p≡p) encryption in a joint Thunderbird extension to be released in December 2015.

[11] Thunderbird 78 includes OpenPGP functionality and no longer requires the installation of external software.