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Coinbase Committee Says Ethereum and Solana May Face Higher Quantum Risk

According to Coinbase’s Independent Advisory Board, Bitcoin mining hash functions remain secure, while wallet and Proof-of-Stake validator signatures may face greater future quantum-related exposure.

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Fact Check
The claim is likely true. CoinPost's '量子コンピュータ、ビットコインよりPoS銘柄に「追加リスク」か コインベース諮問委員会が提言' directly states that Coinbase’s advisory board judged Bitcoin mining hash functions and historical records to be largely secure from quantum threats, while wallet signatures remain vulnerable and PoS chains such as Ethereum and Solana face additional validator-signature risk. BlockBeats' 'Coinbase量子计算和区块链独立顾问委员会发布首份区块链安全立场文件 - BlockBeats' independently confirms the same high-level conclusions and points to Coinbase’s original X post. Search results surfaced Coinbase’s official blog page 'Coinbase Quantum Advisory Council Publishes Position Paper on Quantum Computing and Blockchain', which strongly corroborates that the position paper exists and matches the reported topic. Confidence is medium rather than high because the official Coinbase page could not be directly fetched due to WAF, so the exact wording had to be reconstructed from strong secondary reports plus the official page title surfaced in search.
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Summary

Coinbase’s Independent Advisory Board on Quantum Computing and Blockchain published its first paper, reported with dates of March 21 and April 22, assessing quantum-computing risks for blockchain networks. The board concluded that Bitcoin’s core infrastructure is currently safe from material quantum threats, including its mining process, hash functions, and blockchain history. It said the main concerns are not Bitcoin’s base protocol but exposed cryptographic signatures and public keys, including wallet-layer risks and validator signatures on Proof-of-Stake networks. The paper noted that Ethereum has a defined roadmap to address wallet-related quantum risks, while networks such as Ethereum and Solana may face higher long-term exposure because validator signatures, including BLS signatures and Ed25519, are visible on-chain. The earlier report also noted that about 6.9 million Bitcoin have public keys visible on-chain and emphasized that current crypto systems remain safe because quantum computers capable of such attacks do not yet exist.

Terms & Concepts
  • Bitcoin: A decentralized digital asset that runs on a blockchain and relies on cryptographic systems to secure transactions and network history.
  • Proof-of-Stake: A blockchain validation system where participants lock tokens to help secure the network and earn rewards.
  • Ethereum: A blockchain network that supports programmable applications and smart contracts, with its own native cryptocurrency, ether.