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Ethereum's Kohaku Lead Claims SPHINCS- Can Quantum-Proof Accounts for Seven Cents

6/17/2026

A proposal called SPHINCS- could let Ethereum users shield their accounts from quantum-computing attacks for as little as seven cents, according to the developer leading Ethereum's Kohaku effort.

The scheme targets post-quantum signature verification — the cryptographic step that confirms a transaction is legitimate — and is positioned as a cost-reduction measure while the network pursues a more permanent fix.

What SPHINCS- Actually Does SPHINCS- is a post-quantum signature scheme.

In plain terms, it swaps out the cryptographic algorithms that a sufficiently capable quantum computer could theoretically break for ones designed to resist that class of attack.

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