Why a secure bridge matters
When you connect a hardware wallet to a decentralized app, you create a bridge between your offline keys and an online environment. That bridge must preserve the device's isolation: your private keys should never be exposed to the webpage, clipboard, or any third-party server. Treat every permission request and transaction signature as an irreversible decision.
Practical checklist before connecting
- Only use official device firmware and trusted companion apps.
- Verify the webpage URL and SSL certificate; avoid links from untrusted sources.
- Never type or paste your recovery seed into any site or prompt.
- Use a dedicated, up-to-date browser profile for Web3 interactions when possible.
Safe connection flow (recommended)
Unlock your Trezor device with your PIN, verify firmware version on-device, and open the official Trezor companion app or trusted Web3 connector. Do not connect if you see unexpected prompts on the device screen.
Check the dApp's contract address, requested permissions, and recent reputation. Use block explorers to verify unfamiliar contracts before approving interactions.
When the site requests a connection, confirm the origin in your wallet UI before approving. On the device, validate the address and action exactly as shown — do not rely solely on the browser prompt.
Always review amount, destination address, and network fees on the hardware screen. If any field differs from what you expect, reject the signature and investigate.
Common attack patterns to avoid
- Phishing sites that mimic dApp UIs but ask for seed or private key export.
- Clipboard hijackers that replace copied addresses — always confirm on-device.
- Fake browser extensions claiming to simplify signing — prefer official connectors.
Try the simulator
This in-page simulator demonstrates a safe connection and signing flow without touching any secret data. It shows how prompts appear and how a device would present transaction details for confirmation.