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BULLISH 📈 : Ethereum researchers propose post-quantum wallet verification on EVM at 127k–150k gas

**Ethereum Proposal Brings Post‑Quantum Wallet Security to EVM**

Ethereum researcher *nicocsgy* has proposed a way to verify quantum‑resistant signatures on the EVM without a base‑layer upgrade. The method adapts the SPHINCS+ scheme for Ethereum’s cost model, aiming to make long‑term wallet protection viable before quantum threats emerge.

The design replaces SHAKE256 with KECCAK256, native to the EVM, lowering verification costs. Estimated gas use: **127,000–150,000** — higher than normal but feasible for high‑value accounts.

It focuses on wallet‑level use cases rather than all possible scenarios. This means smart accounts could support quantum‑resistant recovery or migration conditions without waiting for protocol changes.

For custodians and long‑term holders, the approach could enable securing balances against future cryptographic risks, while Ethereum’s base layer evolves gradually.

Still research — not ready for production. Trade‑offs remain around signature size, gas cost, and UX. But it’s a credible early path toward post‑quantum readiness inside Ethereum.

Source: Ethereum Research Forum
Ethereum: ETH