👋 Hey Product Hunt! I'm excited to share SecureGen - an open-source hardware 2FA authenticator and password manager I built on ESP32. **🤔 Why I built this:** I got tired of trusting my 2FA codes to phone apps (always online, closed source, vulnerable to remote attacks). Hardware tokens like YubiKey are great, but expensive ($50+) and you can't see codes or manage passwords. So I built my own for $15 using an ESP32 T-Display. **✨ What it does:** 🔐 TOTP Authenticator - works like Google Authenticator, but offline 🔒 Password Manager - encrypted vault with BLE keyboard typing 📱 Types passwords wirelessly - connects via Bluetooth to any device 🌐 Web management - add/edit via QR code scanning 🔋 Battery powered - completely portable 💾 AES-256 encryption - military-grade security **🛠️ Technical highlights:** - 7-layer security architecture (ECDH key exchange, dynamic APIs, anti-timing attacks) - LE Secure Connections with MITM protection for Bluetooth - Works completely offline (air-gapped mode for maximum security) - Hardware-based encryption keys from ESP32 chip parameters - Memory-optimized BLE + WiFi coexistence (this was painful to get right!) - Configurable keyboard layouts for international users **👥 Perfect for:** ✅ Privacy-conscious users who want verifiable security ✅ Self-hosters building their own infrastructure ✅ Makers/hackers who love DIY hardware ✅ Anyone wanting offline 2FA and password storage ✅ Teams needing shared secure access **📦 What you need to build:** - LILYGO T-Display ESP32 board (~$15 on AliExpress) - USB-C cable for flashing - Optional: 3.7V LiPo battery for portability Pre-compiled binaries available - just flash and go! Full source code on GitHub for those who want to audit/modify. **🔗 Resources:** 📦 GitHub (code + docs): https://github.com/makepkg/Secur... 🎥 2-min demo video:

🛠️ Detailed build guide: https://hackster.io/makepkg/secu...... 📝 Technical deep-dive: https://dev.to/makepkg/implement... **🚀 What's next:** Currently working on: - U2F/FIDO2 support for hardware security keys - Encrypted SD card backup - Custom 3D-printed enclosure designs **💬 I'd love to hear:** - What would YOU want in a hardware security device? - Any privacy/security features I should prioritize? - If you build one, share pics - I'd love to see it! 📸 Happy to answer any technical questions about the build, security implementation, or ESP32 development! Thanks for checking it out 🙏

NMI Payments — Don’t Integrate Payments Until You Read This Guide

Don’t Integrate Payments Until You Read This Guide

Promoted

Maker

📌

2mo ago

🔄 Update — March 2026

v2.1.0 is out with significant improvements:

- DS3231 RTC module support (offline TOTP without WiFi)

- HOTP counter-based codes

- 5-language web interface

- Boot mode system (WiFi / AP / Offline)

- Light sleep crash fix on battery power

Flash from browser: makepkg.github.io/SecureGen/flash

Full changelog: github.com/makepkg/SecureGen

13d ago

SecureGen

esp32, security, password, 2fa, microcontrollers

esp32, security, password, 2fa, microcontrollers