Algorand and Aptos lead blockchain quantum risk prep; some proof-of-stake chains need upgrades.

Coinbase's advisory board highlights that Algorand and Aptos have made significant progress in preparing for future quantum computing risks, while other proof-of-stake networks like Ethereum and Solana require further upgrades. Although quantum computers capable of breaking blockchain cryptography don't exist yet, the board urges early preparation to protect digital assets. Algorand has implemented quantum-resistant transactions, and Aptos's design allows easy upgrades to post-quantum security. Proof-of-stake validators' signature systems remain vulnerable, but networks are developing migration paths to quantum-resistant solutions.