Google warns five quantum attack paths could put $100 billion on Ethereum at risk

A 57-page whitepaper identifies how future quantum computers could target Ethereum's wallets, smart contracts, staking system, Layer 2 networks and data verification layer, with combined exposure exceeding $100 billion. What to know : A new Google Quantum AI paper warns that quantum computers could exploit at least five vulnerabilities in Ethereum, putting more than $100 billion in assets at risk. Because Ethereum public keys become permanently visible once a user transacts, Google estimates the top 1,000 wallets and at least 70 major admin-controlled smart contracts, including those backing key stablecoins, are exposed to quantum attacks. The paper finds that Ethereum’s proof-of-stake system, major Layer 2 networks and a one-time data availability setup are all vulnerable, and while the Ethereum Foundation is pursuing quantum-resistant upgrades by 2029, existing contracts and infrastructure must each be upgraded and rekeyed independently.(Coindesk)