Conceal Authenticator

Conceal Authenticator is an open-source Android application for generating time-based one-time passwords for account verification. It is intended for people who use two-factor authentication and want options for storing and recovering their authentication keys. In MirrorNest, it belongs to the Password & 2FA category.

The app supports TOTP generation using HMAC-SHA1, HMAC-SHA256, and HMAC-SHA512. Codes can be configured with six, seven, or eight digits and with 30- or 60-second periods. Accounts can be added by scanning QR codes, and the app can operate offline after the necessary account information is available. Biometric protection through fingerprint and face recognition is also supported.

Conceal Authenticator offers local-only use, manual encrypted backup, and automatic backup of keys to the blockchain. Its built-in wallet is used for blockchain integration, while a wallet seed can be used to recover the stored authentication keys. The app also supports custom blockchain nodes, future-code previews, multiple themes, and sharing keys with trusted contacts through whitelisted payment IDs.

The blockchain functions are designed around self-custody and direct interaction rather than reliance on a central server. Users remain responsible for protecting their recovery seed when using these backup options. MirrorNest mirrors the official Android build directly on its own storage and scans it for malware before publishing, giving the download a clear fit within the Android open-source Password & 2FA catalog.