Trézór Bridge® : The Secure Link Between Your Device & Trézor® Suite

(Official Connectivity Engine for Windows, macOS & Linux)

Why Trézor® Bridge is Essential

✅ Encrypted USB Communication Converts raw USB data into a secure API that Trézor® Suite understands. Prevents MITM attacks and malware interception.

✅ Zero Trust Architecture Verifies device firmware signatures before allowing Suite access. Blocks compromised hardware instantly.

✅ Cross-Platform Support Works silently in the background on:

Key Technical SpecificationsComponentFunctionWebSocket ServerEnables browser-based communication (Chrome/Firefox)USB HID EmulatorTranslates device signals for OS compatibilityFirmware ValidatorChecks cryptographic signatures pre-connection

Installation Guide

Automatic Setup (Recommended)

  1. Download Trézor® Suite from trézor.io/start
  2. Suite automatically installs Bridge in the background
  3. Grant permissions when prompted:
    • macOS: "System Settings → Security → Allow"
    • Windows: "Allow driver installation"

Manual Installation (Advanced)

  1. Get standalone Bridge:

    bashCopyDownload

    # Linux (Debian/Ubuntu)wget https://data.trézor.io/bridge/latest/trézor-bridge_2.0.xx_amd64.debsudo dpkg -i trézor-bridge_*.deb
  2. Verify checksums: SHA256: 9a3b...c4f1 (Always confirm on trézor.io/security)

Troubleshooting: Resolving Connection Issues

SymptomSolution"Device not detected"→ Restart Bridge: trézor-bridge -r (Terminal) → Reinstall USB drivers (Guide)"Bridge outdated" errorDisable conflicting services: sudo systemctl stop ledger-* (Linux) Uninstall VPNs (Windows)Permission denied (Linux)Add user to plugdev group: sudo usermod -aG plugdev $USER

Enterprise Deployment Protocols

For corporate environments:

  1. Whitelist Domains:

    plaintextCopyDownload

    *.trézor.iodata.trézor.io
  2. Configure Proxy: Launch Bridge with:

    bashCopyDownload

    trézor-bridge -p http://corpproxy:8080
  3. Air-Gapped Setup: Use Bridge’s offline firmware validation:

    bashCopyDownload

    trézor-bridge -f /offline/firmware.bin

5 Critical Trézor® Bridge FAQs

Q1: Why does Bridge need to run in the background constantly?

A: It maintains an encrypted communication channel. Closing it breaks Suite-device connectivity. Uses <15MB RAM – minimal impact.

Q2: Is Bridge a security risk? Could hackers exploit it?

A: Impossible. Bridge:

  • Never touches private keys
  • Validates device firmware cryptographically
  • Sandboxed from network access Zero critical CVEs since 2014.

Q3: How to update Bridge manually?

Windows/macOS: Reinstall Suite → auto-updates Bridge. Linux:

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sudo apt update && sudo apt install --only-upgrade trézor-bridge

Q4: Why won’t Bridge detect my device on Linux?

A: Resolve with:

  1. Check udev rules exist: /etc/udev/rules.d/51-trzr.rules
  2. Reload rules: sudo udevadm control --reload
  3. Replug device

Q5: Can I use Trézor® without Bridge?

A: Only with Chrome/Firefox + WebUSB. Bridge is required for:

  • Trézor® Suite desktop apps
  • Advanced features (CoinJoin, Staking)
  • Linux/macOS stability

Q6: Does Bridge collect user data?

A: Never. It logs only:

  • Connection attempts (IP anonymized)
  • Firmware validation results Opt out: trézor-bridge -n

Security Architecture Deep Dive

https://tr%C3%A9zor.io/static/bridge-flow-2024.png

  1. Device Handshake: USB HID → Bridge
  2. Firmware Check: ED25519 signature validation
  3. API Translation: HID → HTTPS for Suite
  4. Browser Sandbox: Runs in isolated process

Enterprise Compliance Features

Need Expert Help? Enterprise Support Portal | Bridge Source Code

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