Educational Portal: Learn how Trezor Bridge facilitates secure cryptographic handshakes between web applications and hardware enclaves.

Protocol Reference v2.0

Hardware Communication Architecture

Demystifying Trezor Bridge Communication

Trezor Bridge operates as an essential, zero-knowledge background service that connects web interfaces to cold storage devices via isolated USB protocols. Discover how local daemons verify signatures without ever exposing private key material.

Explore Architecture Guide

Local Daemon Specs

Default Loopback

Open Source Code

Keys Exposed Ever

Interactive Data Tunnel

Browser to Device Cryptographic Pathway

ACTIVE DAEMON

Client Application / Web Suite

Sends Protobuf payload via HTTP request

HTTP JSON

Trezor Bridge Daemon

127.0.0.1:21325 Local Bridge Service

LIBUSB LINKED

Physical Hardware Enclave

Cryptographic operations signed offline

RAW HID USB