PGP Shield

Modern Android OpenPGP key manager with accessibility overlay encryption.

PGP Shield is an open-source Android app for managing OpenPGP keys and performing encryption in any messenger — inspired by OpenKeychain and Oversec. Part of the OnionPhone app family.

Private keys never leave your device. Secret key material is stored in AES-GCM encrypted blobs.

Features Feature Description Key management Create RSA-3072 keys, import/export armored rings, QR codes, subkeys, revocation certs Crypto workspace Encrypt/decrypt/sign/verify text and files; folder archives via GpgTar Overlay encryption Accessibility-service floating buttons to encrypt/decrypt in messenger text fields Text encoders Zero-width steganography, padding templates, base64, symmetric overlay encoding Dual API Custom PgpShieldClient AIDL + OpenIntents OpenPGP compatibility layer Share intents Encrypt/decrypt from any app via Android share sheet Keyserver lookup HKP search and key refresh Autocrypt Parse Autocrypt headers from incoming mail Security hardening Encrypted blob storage, FLAG_SECURE, sensitive clipboard wipe, log redaction i18n English, Spanish, French UI strings Material 3 UI Jetpack Compose with adaptive navigation