Protocol | April 22, 2026

Coinbase Warns Stakers Face a Longer Quantum Migration

A new advisory paper said wallets remain the clearest target, but proof-of-stake systems like Ethereum and Solana also expose validator signatures that will need new cryptography.

Coinbase's Independent Advisory Board on Quantum Computing and Blockchain says crypto is still safe today, but proof-of-stake networks have an extra migration problem that Bitcoin does not carry.

In a position paper published Tuesday, the board said the biggest long-run risk is still the signature cryptography that proves control of funds. Wallets with exposed public-key data remain the clearest target. But it also singled out proof-of-stake chains, where validator signatures do more than protect a single wallet. They help secure consensus itself. That gives networks like Ethereum and Solana another layer that will need to move to quantum-resistant cryptography over time.