Google’s quantum computing team has published a white paper detailing how a sufficiently advanced quantum computer could crack the private keys of Ethereum’s 1,000 wealthiest wallets in under 9 days, directly risking more than 20 million ETH.
In addition, the paper introduced a timeline that researchers say no longer allows room for complacency.
What Google’s Research Found
To understand the risk, it helps to know how crypto wallets stay secure today. Every wallet has a private key, a secret password of sorts, and a public address that others can see. The security system currently used by Ethereum makes it essentially impossible to work backwards from the public address to the private key. Quantum computers, once powerful enough, would break that barrier entirely.
According to the Google paper, Ethereum is vulnerable at five separate levels. The most direct threat is to individual wallets: the top 1,000 alone hold around 20.5 million ETH. But smart contracts, the self-executing p
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