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A team of Ethereum researchers published a design plan on Monday to start protecting the network's validators from future quantum computers. Led by Thomas Coratger, it is the first concrete proposal to move Ethereum's roughly 1 million validators off the cryptography they rely on today — the same math that secures most of crypto — which a powerful enough quantum computer could eventually break.
The design post went up on the Ethereum Research forum on June 1. It was written by Coratger along with Tom Wambsgans, Ladislaus, Thomas Thiery and Ethereum Foundation researcher Justin Drake. The plan proposes a separate upgrade called the Public Key Registry. It would let validators sign up new, quantum-safe keys — a type known as XMSS — well before the network swaps out its main signature system. The registry appears as I* on the Ethereum Foundation protocol team's Strawmap roadmap.
The full switch to the new signatures would come "several forks later," the authors wrote. Until then, the registry acts as a "critical warmup phase." It gives validators time to update their cold-storage setups without risking the network's ability to finalize transactions.
