OpenKeychain

OpenKeychain enhances your digital privacy using the **OpenPGP standard** for strong, compatible encryption. Send messages only readable by recipients, receive messages only you can decrypt, and digitally sign them for sender verification. Crucially, your cryptographic keys are stored **locally on your Android device**, giving you full control. Its **open-source** nature ensures transparency, allowing code scrutiny by anyone. This is backed by an **independent security audit** from Cure53, which found no critical vulnerabilities, highlighting its robust design. OpenKeychain manages your digital keys and helps integrate with apps like K-9 Mail for **end-to-end encrypted email** (note: third-party app integrations are not audited by OpenKeychain developers). Permissions are transparently managed and requested only when necessary, with contact access for key association performed offline to protect your privacy.