Binance Blog published a new article, highlighting the security risks associated with signing messages on the blockchain. This article aims to educate users about the potential dangers and how to protect themselves from scams.
Signing messages is a crucial part of blockchain transactions, allowing users to authorize actions, verify identities, and interact with decentralized applications (DApps). However, if not handled carefully, it can expose users to significant security threats. The 'eth_sign' function, which permits users to sign arbitrary messages, is particularly susceptible to misuse, potentially enabling attackers to gain full control over a victim's assets. To safeguard against such risks, users are advised to use trusted platforms, avoid signing unfamiliar messages, and stay informed about common scams.
In the decentralized space, signatures are essential for both authorizing transactions and interacting with DApps. They come in two main types: on-chain (transaction) and off-chain (message) signatures. On-chain signatures are used to authorize actions that change the state of the blockchain, such as transferring funds or executing smart contracts. Off-chain signatures, on the other hand, are used for actions that do not affect the blockchain’s state, such as verifying user identity or logging into a DApp. It is off-chain signatures that Web3 users often interact with, and these are the ones that can be exploited by criminals.
The article explains that the eth_sign function allows users to sign arbitrary messages with their private keys, posing potential security risks. This method uses a raw, non-readable message format without any prefix or context, leading users to often misunderstand the implications of what they are signing. The most severe risk is that signing a malicious message can grant an attacker full control over a user's assets. To mitigate these risks, the article advises using more secure methods like personal_sign and eth_signTypedData, which provide more context and clarity about what is being signed.
Real-life examples illustrate how scammers exploit message signing. For instance, fake NFT airdrops and impersonation of well-known projects are common tactics used to deceive users into signing malicious messages. These scams often create a sense of urgency, pressuring users to act quickly without verifying the legitimacy of the offer. To protect themselves, users should be cautious of unsolicited offers, verify the authenticity of social media accounts, and use secure wallets that provide protection against malicious messages.
Binance Web3 Wallet has taken measures to protect users by banning the eth_sign function, preventing users from falling victim to such scams. The article concludes by emphasizing the importance of staying informed and adopting security best practices to ensure the safety of assets in the Web3 ecosystem.