The blind signing scam continues to be a significant issue in decentralized finance today. This type of scam involves fraudsters crafting misleading smart contracts to take assets from users’ crypto wallets. But what exactly does blind signing mean, and what steps can you take to protect yourself from these scams?
Smart contracts Vs. blind signatures
Smart contracts are essential for many dApps, NFTs, and parts of DeFi. If you want to stake your cryptocurrency in a liquidity pool to earn some monthly yield, the liquidity protocol works through smart contracts that need access to the tokens in your wallet. So, you have to give their smart contracts permission to access your tokens.
When you approve this transaction using your hardware wallet’s private key, it means you agree to the smart contract’s terms and conditions and trust its code completely.
A blind signature allows a smart contract to access your wallet’s tokens without you knowing all the details of the contract. In traditional finance, signing a contract means you understand and agree to its terms. Therefore, you can think of blind signing as similar to signing a paper contract without reading all the terms and conditions thoroughly.
What happens if the smart contract doesn’t share all its details when signing?
Crypto wallets frequently struggle to show essential information due to the complicated code found in smart contracts. These contracts often hold vital contact details that are tough to pull out and display in a way that users can grasp.
Originally made for straightforward blockchain transactions, hardware wallets now enable users to engage with intricate smart contracts for DeFi via protocols like WalletConnect. Still, these protocols don’t always make the information easy to comprehend.
As a result, you might find yourself signing transactions based on trust without a clear assurance of what they contain.
Does a trusted display prevent blind signing scams?
Some people might say that having a reliable display wallet reduces the chances of getting caught in blind-signing scams. Basically, a trusted display lets the user see exactly what they are signing.
A reliable display is a digital screen that presents verified and genuine information, making sure that the information shown is accurate, trustworthy, and safe.
Here’s a thrilling idea. Can a reliable display show information that doesn’t actually exist? These displays carry the same limitations as a hardware wallet — the smart contract code can be overly complicated. Plus, they can only display whatever info the wallet’s chip can interpret from the smart contract — which makes it pretty similar to your mobile phone’s screen.
Unlike your mobile phone, which is one of the countless units made for different users, crypto wallets with “trusted displays” can be vulnerable to supply chain attacks — for instance, by swapping out or reprogramming an insecure chip within the wallet.