CipherMail is a Chrome extension designed to enhance email security by integrating OpenPGP encryption within Gmail. This free tool allows users to encrypt and decrypt emails seamlessly, ensuring that sensitive information remains protected. Users can also digitally sign their messages, adding a layer of authenticity, while the automatic verification of signatures on received emails helps maintain trust in communications.

The extension provides robust key management features, allowing users to generate, export, import, and rotate their PGP keys easily. With security measures such as RSA-4096 bit key generation and AES-256-GCM encryption for local key storage, users can rest assured that their private keys are well protected. Additional features include a key server lookup for recipient public keys, passphrase strength validation, and automatic clipboard clearing, making CipherMail a comprehensive solution for secure email communication.