# ESP32Authenticator – a password manager and FIDO2 key on an e\-ink reader

- HackerByte page: <https://hackerbyte.net/en/stories/a-hardware-project-integrated-into-an-e-ink-reader-providing-password-management-50385074>
- Original source: <https://github.com/merlokk/ESP32Authenticator>
- Hacker News discussion: <https://news.ycombinator.com/item?id=50385074>
- Submitted to Hacker News: 2026-11-05T21:59:08.000Z

A hardware project integrated into an e\-ink reader, providing password management and FIDO2 authentication.

## AI-generated summary

The ESP32Authenticator project transforms the XTEINK X4 Pro Pocket eReader into a hardware authenticator. It securely stores and displays credentials like logins, passwords, TOTP codes, and FIDO2 keys on its e\-ink screen. The device can then transmit this information to a host computer via BLE as a keyboard or a FIDO2/U2F key.

## Key points

- Transforms XTEINK X4 Pro eReader into a hardware authenticator.
- Securely stores login, password, TOTP, and FIDO2 credentials.
- Displays credentials on an e\-ink screen.
- Transmits data via BLE HID keyboard or FIDO2/U2F.
- Written in C\+\+ using ESP\-IDF.