What is Blind Signing?

Blind signing is confirming a transaction or signature request when you cannot fully read or interpret what you are approving, for example when a hardware wallet can only show raw, unreadable data for a complex smart-contract call. You are trusting that the request is what it claims to be, without being able to verify it.

This matters because blind signing is a major cause of losses. Attackers craft requests that look routine but actually grant sweeping permissions or transfer assets, and if you sign blindly, you have no way to catch it.

Example: a malicious site presents a signature request that appears to be a simple login but is really a permission granting spending access to your tokens; unable to decode it, you sign anyway and get drained.

Safety note: avoid blind signing whenever possible. Use wallets that clearly decode and display transaction details, be extremely cautious with requests you cannot read, and never sign an opaque request from an unfamiliar or unverified site. If a hardware wallet warns that blind signing is required, treat that as a strong reason to stop and reconsider. Related terms include message signing, token approval, hardware wallet, and wallet-drainer.