Nobody Knows Your Password ;)

Qu4d_KEY is a physical USB device that securely stores and auto-fills your passwords without ever connecting to the internet.

Qu4d_KEY device

Features

No one knows you password because everyone has a little part of it.

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Hardware Encryption

All passwords are encrypted with AES-GCM directly on the ESP32-S3 chip. Your master password is never written.

Offline Security

No internet connection required. Your encrypted password never leave the physical device, eliminating cloud-based attack vectors.

USB HID Emulation

Works as a standard USB keyboard on any operating system. No drivers or additional software required.

How It Works

Three simple steps to password freedom.

1

Plug In

Connect Qu4d_KEY to the device of your choice.

2

Enter Master PIN

Input your 7-digit PIN on the device.

3

Auto-Type

Select your password and validate.
Done 🎉, Your password is typed.

Technical Specifications

ESP32-S3 Microcontroller Dual-core 240 MHz MCU with native USB-HID support.
Native USB-C HID Emulation Acts as a plug-and-play keyboard over USB 2.0.
On-Chip Encrypted Storage Passwords stored securely in internal flash memory.
Local Decryption Engine Master password decrypts credentials directly on-device.
128×32 I2C OLED Display Compact monochrome screen for intuitive navigation.
4-Button Hardware Interface Tactile controls with RC hardware debouncing.
3.3V LDO Power Regulation Stable power from USB 5V input.
Compact Form Factor 20 × 38 × 12 mm — pocket-sized security key.