How to enable "Blind Signing" on Ledger for dApp transactions?

Understanding Blind Signing Functionality

1. Blind Signing is a security feature embedded in Ledger hardware wallets that allows users to approve transactions without exposing sensitive data like contract addresses or function calls to the device’s interface.

2. This mode prevents malicious dApps from tricking users into signing unintended operations by obscuring transaction details during confirmation.

3. It operates at the firmware level and requires explicit user activation before any dApp interaction can proceed under this setting.

4. The feature does not alter how signatures are generated—it maintains cryptographic integrity while changing what information appears on the device screen.

5. Users must understand that enabling Blind Signing shifts responsibility entirely to their own judgment since no human-readable context is displayed during signing prompts.

Prerequisites for Activation

1. A Ledger Nano S Plus, Nano X, or Flex device with firmware version 2.1.0 or higher is mandatory.

2. Ledger Live desktop application must be installed and updated to the latest stable release.

3. The Ethereum or EVM-compatible app must be open on the device before attempting configuration changes.

4. USB connection or Bluetooth pairing (for Nano X) must be active and recognized by Ledger Live.

5. User must possess full physical access to the device and its recovery phrase—no remote or third-party intervention is permitted during setup.

Navigating the Settings Interface

1. Launch Ledger Live and connect the device using the correct cable or wireless method.

2. Go to the “Manager” tab and ensure the Ethereum app is installed and currently running on the device.

3. Click the gear icon in the top-right corner of Ledger Live to open Settings.

4. Select “Security” from the left-hand menu, then locate the toggle labeled “Blind Signing for Ethereum dApps”.

5. Slide the toggle to the right and confirm the change directly on the Ledger device screen using both side buttons.

Verifying Successful Enablement

1. After toggling, attempt to interact with a known dApp such as Uniswap or Aave through a browser wallet connector.

2. Initiate a simple transaction like approving an ERC-20 token allowance and observe the device display.

3. If Blind Signing is active, only generic prompts like “Confirm transaction?” will appear—no contract address, amount, or function name will be shown.

4. Check Ledger Live’s transaction history log; entries made under Blind Signing will include a visual indicator—a small eye-slash icon next to the transaction hash.

5. Attempt to disable the feature again using the same path to confirm reversibility and responsiveness of the interface.

Frequently Asked Questions

Q: Does Blind Signing affect gas fee estimation or transaction broadcasting?No. Gas parameters are still computed and submitted by the dApp frontend. Ledger only signs the final serialized transaction payload.

Q: Can I enable Blind Signing for non-Ethereum chains like Solana or Cosmos?Currently, Blind Signing support is limited to Ethereum and EVM-compatible networks including Polygon, Arbitrum, and Optimism. Other ecosystems do not expose this option in Ledger firmware.

Q: What happens if I sign a malicious transaction while Blind Signing is enabled?The signature is cryptographically valid and irreversible. Ledger cannot detect intent or logic flaws—the user bears full responsibility for verifying off-device context before confirming.

Q: Is Blind Signing compatible with Ledger’s browser extension wallet connector?Yes. The Ledger Live browser extension respects the device-level Blind Signing setting and suppresses detailed transaction previews accordingly when connected to dApps.