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Simple control, powerful features

ZeroKeyUSB has no buttons, no apps, and no hidden menus — only five golden touch points that control everything you need.
The main menu becomes accessible after entering your Master PIN. From navigating credentials to backing up your data, every function is available through a clear on-screen interface designed for clarity and safety.
The capacitive touch controls are intuitive and responsive:
GestureAction
Right →Move forward / Confirm / Open submenu
Left ←Go back / Exit current screen
Up ↑ / Down ↓Scroll through options or change characters
Center •Select / Confirm
Long pressTriggers special functions (e.g. factory-reset confirmation)
A small label at the top of the display shows your current context (MENU, SITE, TOTP, or SETUP).
When you enter the main menu, you’ll see five sections:
  1. Backup
  2. Settings
  3. TOTP
  4. Danger Zone
  5. Info
Each section is explained below.

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🔁 Backup

ZeroKeyUSB allows you to export and import credentials through the USB serial interface.

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Import credentials

Used to restore data previously exported from the same device.
After selecting Import, ZeroKeyUSB waits for data sent from the local web manager or a trusted terminal.
If the current PIN differs from the one used to create the backup, restoration will fail.

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Export credentials

Sends all stored entries over USB serial in plain CSV-like text (site, username, password, optional TOTP).
Although data is decrypted for transmission, it is never stored externally unless you save it manually.
💡 Tip: Always make a local backup before performing a factory reset, and keep it offline.

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⚙️ Settings

Adjust how your ZeroKeyUSB behaves — always offline.

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Rotate Screen

Flips the display orientation for left- or right-handed use.

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Keyboard Layout

The device emulates a US-QWERTY keyboard.
Other layouts (ES, FR, DE…) are not stored internally; hosts with different layouts may need to adjust special characters.

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About

Displays firmware information in a read-only screen:
ZeroKey USB SW 1.0.0 SN XXXXXXXX github.com/Depbit-lab

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⏱️ TOTP

If a credential includes a two-factor authentication (2FA) secret, you can generate a time-based code directly from the device. When entering TOTP:
  • If time has not been set, the screen shows
    Time not set → Request host time.
  • Once synchronized, a six-digit code appears with a 30 s countdown.
  • The code refreshes automatically at the end of each interval.
Currently, ZeroKeyUSB implements SHA-1 (RFC 6238).
Future firmware versions may include optional SHA-256 and SHA-512.
🔒 The TOTP system works entirely offline. No app or cloud sync is ever required.

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⚠️ Danger Zone

Actions inside this section are irreversible and require long-press confirmation.

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Reset PIN

Resets the Master PIN and erases all stored data.
The device restarts in initial setup mode and generates a new encryption seed.

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Delete Credentials

Erases all sites, usernames, passwords, and TOTP secrets.
A visual countdown appears before the deletion begins.
🧠 During deletion, the screen displays:
“Critical process — unplug to cancel.”

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Factory Reset

Fully restores the device to factory state:
  • Wipes all memory, including PIN signature and IV.
  • Regenerates a new encryption seed.
  • Returns to first-time setup.

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ℹ️ Info

A quick way to view essential device information: All information is read-only and cannot be modified from the menu.

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Design philosophy

The menu system is intentionally minimalist:
  • No deep submenus — every option is two taps away.
  • No unnecessary animations — focused on clarity.
  • All operations are local and reversible (except secure erasure).
  • Layout and gestures remain consistent across firmware versions.
ZeroKeyUSB is built for confidence, not configuration.
Once you learn the gestures, you can operate it entirely from muscle memory — safely, silently, and offline.
ZeroKeyUSB requires no drivers or software installation.
It’s recognized as a standard USB keyboard on any operating system.
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