Google Quantum AI has published a paper warning that quantum computers could exploit at least five distinct vulnerabilities within the Ethereum network. The research estimates that more than $100 billion in assets currently face exposure to potential quantum attacks. The findings have drawn significant attention from the cryptocurrency and cybersecurity communities given the scale of the risk identified.
A central concern raised in the paper relates to how Ethereum public keys become permanently visible once a user completes a transaction. This persistent visibility creates an opening for quantum-capable adversaries to target wallets and contracts that have already been used. Google’s analysis suggests this structural characteristic of the network is a foundational source of risk.
According to the paper, the top 1,000 Ethereum wallets are among those considered exposed to quantum attacks. At least 70 major admin-controlled smart contracts are also identified as vulnerable, including those that underpin key stablecoins. The breadth of exposure spans some of the most widely used infrastructure within the Ethereum ecosystem.
The research further finds that Ethereum’s proof-of-stake consensus mechanism carries quantum vulnerabilities, as do major Layer 2 networks built on top of the base chain. A one-time data availability setup is also flagged as a point of weakness. Together, these findings indicate that the risk is not confined to a single component but is distributed across multiple layers of the network’s architecture.
The Ethereum Foundation is reported to be pursuing quantum-resistant upgrades with a target completion date of 2029. However, the paper notes that existing contracts and infrastructure cannot be updated through a single centralised fix. Each individual contract and system component must be upgraded and rekeyed independently, presenting a significant coordination and logistical challenge for the broader ecosystem.
Originally reported by CoinDesk.
