A critical security feature used by major cryptocurrency exchanges, including Coinbase and Binance, may become vulnerable with the shift to post-quantum cryptography. Current systems rely on hierarchical deterministic wallets (BIP32) to generate new deposit addresses from a public key while keeping private keys offline in cold storage.
Researchers at Project Eleven, a startup focused on quantum-resistant security, argue that some post-quantum signature schemes, such as ML-DSA standardized by NIST, could render this architecture non-functional. This means exchanges might lose the ability to create fresh receiving addresses from public keys alone, potentially forcing a reliance on more complex and riskier methods for managing private keys.
Project Eleven has developed a prototype wallet designed to restore this functionality using quantum-resistant techniques. While some blockchains like Ethereum could implement similar solutions via account abstraction, networks like Bitcoin would require protocol upgrades to support the necessary signature schemes.