OpenKeyChain

File encryption is important for mobile security, allowing users to encrypt files for secure access and sharing. The OpenKeyChain app simplifies this process for Android users by utilizing public key encryption, which involves a private key on the recipient's device and a public key shared for sending encrypted files. To get started, users need an Android device and the OpenKeyChain app. They must create their own key and can import public keys from others. Files can be encrypted for other users or stored securely on the device or Google Drive. Encrypted files have a .gpg extension, and users can disguise them for added security. The decryption process involves selecting the encrypted file within the app.