Android Security Authentication OTP TEE
Hardware Authenticator
Built for users who face the highest threat of device compromise — journalists, executives, activists, and anyone operating in environments where even the operating system cannot be trusted. Hardware Authenticator was an Android application that leveraged a direct Trusted Execution Environment (TEE) to display path for OTP passcodes: the codes were generated and rendered entirely within the secure enclave, and pushed directly to the display at the hardware level. No app — not even the OS — could read or intercept the passcode in transit.
This architecture closed a long-standing attack surface present in every conventional authenticator app, where passcodes pass through the OS before reaching the screen — a window that malware, screen-capture exploits, and accessibility-layer attacks can exploit. By severing that path entirely, Hardware Authenticator offered a level of credential protection that software alone cannot replicate.
The product was fully shipped and released. It has since been discontinued.