OpenKeychain helps you communicate more privately and securely. It uses encryption to ensure that your messages can be read only by the people you send them to, others can send you messages that only you can read, and these messages can be digitally signed so the people getting them are sure who sent them. OpenKeychain is based on the well established OpenPGP standard making encryption compatible across your devices and systems.
Using OpenPGP means your encrypted e-mail will be interoperable across Windows, MacOS, Linux and browers for applications listed at OpenPGP's website (including ProtonMail).
The auditing company Cure53 performed an intensive security audit of OpenKeychain.
OpenKeychain primarily integrates with K-9 Mail to provide end-to-end encryption capabilities but also with 11 other Android apps listed at link below.
See OpenKeychain Â· OpenKeychain
Donations:PayPal / Flattr / Bitcoin# OpenKeychainOpenKeychain helps you communicate more privately and securely...