An Ethereum researcher tied to the Kohaku privacy and wallet project has floated an early-stage proposal for quantum-resistant smart accounts — an opt-in route that would let users shield their funds from future quantum threats without waiting for a network-wide overhaul. The concept, shared this week on X by researcher Nicolas Consigny, leverages account abstraction to add flexible cryptographic protections at a relatively low gas cost. It is not a finished upgrade, and the author stresses that quantum attacks are not imminent.
The proposal
Most crypto wallets today rely on public-key cryptography that is safe under current computing assumptions. But a sufficiently powerful quantum computer could eventually break those signatures. The researcher’s idea is to let individual accounts — especially high-value ones like DAO treasuries or institutional wallets — opt into quantum-resistant signatures now, rather than forcing every user to migrate at once. The key is keeping verification costs low, since on-chain operations are priced by gas.
Why opt-in matters
Pushing a quantum-resistant scheme onto every account would require a hard fork and years of testing. An opt-in model lets the users who face the biggest risk adopt stronger protection immediately, while the rest of the network stays on the existing curve. That matters for groups that hold large sums for long periods — a DAO sitting on millions of dollars in a multisig is a far more tempting target than a casual trader’s hot wallet. The proposal gives those accounts a path to upgrade without waiting for the full Ethereum roadmap to pivot.
The role of account abstraction
Traditional Ethereum accounts (externally owned accounts, or EOAs) have rigid signature logic. Smart accounts, enabled by account abstraction, can run custom validation code. That flexibility is what makes this proposal possible: a smart account could swap in a quantum-resistant verification module while keeping the same user experience. The researcher’s note frames this as a relatively lightweight change, since the heavy lifting is already done by the account abstraction infrastructure.
What’s next
This is not a final Ethereum roadmap item. Cryptographic changes of this kind require deep review, formal verification, and extensive testing before they could be considered for inclusion. The proposal has yet to be taken up by the core development community, and no timeline has been suggested. For now, it stays in the discussion phase — but it gives the ecosystem a concrete starting point for a conversation that, until recently, felt like science fiction.
