Binance's $6.36B Heist Exposes Authorization Flaws, Not Cryptography

The largest cryptocurrency heist in history, targeting Binance on October 29, saw approximately $6.36 billion in digital assets stolen in just 20 minutes, shifting security concerns from blockchain cryptography to authorization systems. Investigators, including TRM Labs, attribute the attack to North Korean-linked group TraderTraitor, which exploited Binance's signature infrastructure without breaking cryptography. Attackers used EIP-7702 functionality to delegate wallet control to a smart contract, moving 167,464 ethers and other tokens. The incident highlights that blockchain security differs from system security, as valid signatures were generated through compromised authorization infrastructure. Experts recommend strengthening access controls, limiting permissions, and implementing rapid transfer-stopping mechanisms to prevent similar attacks.