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Ethereum proposes post-quantum account protection for $0.07.

15.06.2026

Nicolas Consigny, head of the Kohaku project at the Ethereum Foundation, has introduced a concept for protecting accounts from quantum computer attacks. The solution, called SPHINCS-, aims to secure wallets without requiring a hard fork.

The implementation cost is approximately $0.07. The method is based on the SPHINCS+ signature standard developed by the U.S. National Institute of Standards and Technology (NIST).

Consigny adapted the algorithm for efficient operation on the Ethereum network. SPHINCS- does not require protocol changes and serves as an interim step before the launch of the leanSPHINCS system, which will further reduce costs through data aggregation.

The new solution aims to eliminate risks associated with the elliptic curve digital signature algorithm currently used by the network.

Discussion about quantum threats intensified following an experiment by researcher Giancarlo Lelli. In April, he used a quantum computer to crack a 15-bit key.

Bitcoin keys are 256 bits long, making them significantly harder to crack. However, the theoretical threat persists due to Shor’s algorithm.

According to Glassnode, about 1.92 million BTC (nearly 10% of the supply) are vulnerable to quantum attacks due to their structure. Another 4.12 million BTC are at risk due to address management features.

In June, Coinbase’s board outlined scenarios for quantum migration of bitcoins.

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