StarkWare Cuts Quantum‑Safe Bitcoin Transaction Cost by 79%

StarkWare announced that the computational cost of building a quantum‑safe Bitcoin transaction has dropped to an estimated $66, a 79% reduction from the $320 cost of the first main‑net transaction in August.

Optimization Challenge Results

From September 16 to September 23, StarkWare, Yukon Research and Eigen Labs ran the Quantum‑Safe Bitcoin (QSB) Optimization Challenge. Participants submitted 62 accepted improvements across two key computational tasks, cutting the benchmark‑based cost estimate by roughly three‑quarters.

What Is Quantum‑Safe Bitcoin?

QSB is a design published by StarkWare researcher Avihu Levy in April. It adds hash‑based protection to Bitcoin transactions without altering the network’s consensus rules, positioning it as an “emergency” or “last‑resort” measure against future quantum attacks.

Cost Comparison

• First QSB transaction (August 26): ~3,100 GPU‑hours on ~100 GPUs, cost ≈ $320.
• Post‑challenge estimate: $66 per transaction.

Implications

The lower cost makes the experimental defense more accessible for holders with large, unexposed balances in a potential quantum‑related emergency. StarkWare still views a soft‑fork change to Bitcoin’s consensus rules as the preferred long‑term solution for quantum resistance.