EVM Chains Could Add Post-Quantum Security Before Ethereum 2029

Quantus CEO Christopher Smith argued in a research paper shared with Bitcoin.com News that EVM-compatible chains can add optional post-quantum transaction security well ahead of Ethereum’s roadmap, which currently targets quantum resistance around 2029. The proposal, dubbed Quantus, would let EVM accounts opt into quantum-safe signing without waiting for Ethereum’s protocol-level overhaul. The paper positions this as a faster path for the broader EVM ecosystem, which includes chains such as BNB Chain, Polygon and Arbitrum, to protect user accounts against future quantum threats. It matters because Ethereum’s own timeline leaves several years in which on-chain accounts remain exposed, and optional schemes could be adopted piecemeal by individual chains and wallets. What to watch next is whether EVM chains and wallet providers implement the optional standard, and how Ethereum’s own post-quantum work progresses toward its 2029 target.