Secure Authentication with Trezor Login®

The Trezor device implements a sophisticated security protocol to protect against brute-force PIN attacks:

• First failed attempt: No delay
• Second failed attempt: 2-second delay
• Third failed attempt: 4-second delay
• Subsequent failures: Delay doubles with each attempt (8, 16, 32 seconds, etc.)
• After 16 failures: Device wipes itself automatically for security

This exponential backoff system makes brute-force attacks practically impossible while allowing legitimate users who make occasional mistakes to eventually access their device. If you've genuinely forgotten your PIN, it's safer to wipe the device and restore from your recovery seed rather than risk triggering the wipe mechanism through repeated failed attempts.

Yes, you can use your Trezor device with multiple computers, but not simultaneously. The Trezor Login® process works as follows:

• Single Session: Your Trezor can only be actively connected to one computer at a time
• Multiple Computers: You can use the same Trezor with different computers by connecting it sequentially
• No Configuration Needed: Your wallet settings and accounts are stored on the device, so they're available on any computer
• Security Maintained: Private keys never leave the device, maintaining security across all access points
• Trezor Suite Sync: Account discovery happens independently on each computer, but your transaction history is pulled from the blockchain

This flexibility allows you to access your funds from home, work, or while traveling, while maintaining the same high security standards across all access points.

Trezor Login® is designed with public computer use in mind and maintains security through several key features:

• PIN Protection: Your PIN is entered on the Trezor device, not the computer keyboard
• Randomized Keypad: The PIN entry screen randomizes number positions to defeat keyloggers
• Transaction Verification: All transactions must be confirmed on the device screen
• No Key Exposure: Private keys never leave the Trezor device
• Malware Resistance: Even with compromised computer software, funds cannot be stolen without physical device access

However, for maximum security on public computers, we recommend these additional precautions:

1. Use the Trezor Suite desktop app instead of the web version when possible
2. Verify website SSL certificates before entering any information
3. Clear browser cache after use
4. Never leave your Trezor device unattended
5. Consider using a passphrase for an additional security layer

Both the web and desktop versions of Trezor Suite provide secure access to your Trezor wallet, but there are important differences:

From a security perspective, both options are equally secure as your private keys remain protected on the Trezor device itself. The desktop application generally offers a smoother user experience and access to newer features first, while the web version provides greater accessibility across different computers.

Trezor Login® incorporates multiple layers of protection against phishing and fraudulent websites:

• Device Screen Verification: Your Trezor displays the connected website's domain, allowing you to verify legitimacy
• FIDO U2F Integration: Trezor can function as a physical security key, preventing phishing even if you accidentally enter credentials on a fake site
• Transaction Details Display: All transaction information is shown on the device screen, preventing address substitution attacks
• Official Website Bookmarks: We recommend bookmarking the official Trezor Suite website to avoid typosquatting
• SSL Certificate Validation: The web interface uses strict HTTPS enforcement with valid certificates
• Community Reporting: Active community and rapid response to reported phishing attempts

Additionally, Trezor maintains a dedicated phishing awareness page with current threats and educational resources. Remember: Trezor will never contact you first to request your recovery seed, PIN, or other sensitive information.

While Trezor Login® itself doesn't require an internet connection (the authentication happens between your device and computer), full functionality does require internet access:

• Offline Possible: You can connect your Trezor and enter your PIN without internet
• Limited Functionality: Without internet, you cannot check balances, receive new transactions, or broadcast transactions
• Transaction Creation: You can create and sign transactions offline, then broadcast them later when internet is available
• Watch-only Wallets: You can use watch-only wallets to monitor addresses without your Trezor connected
• Air-gapped Security: Advanced users can create completely air-gapped setups for maximum security

This partial offline capability is valuable for security-conscious users or those in environments with limited internet access. You can prepare transactions on an offline computer, sign them with your Trezor, then transfer the signed transaction to an online computer for broadcasting, ensuring your private keys never touch an internet-connected device.