TLDR Tech / Crypto
Coinbase Flags Proof-of-Stake Chains as Quantum Risks
Coinbase's Independent Advisory Board on Quantum Computing and Blockchain identified two structural PoS vulnerabilities: validator signature schemes (Ethereum's BLS and Solana's Ed25519) that secure consensus, and onchain wallet signatures, with the board warning consensus mechanisms themselves may require redesign rather than simple wallet upgrades. Ethereum developers, led by Vitalik Buterin, have proposed replacing BLS validator signatures, KZG commitments, and ECDSA wallet signatures with post-quantum alternatives, though the board projects a multi-year timeline to migrate wallets, exchanges, custodians, and decentralized networks.
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