A seven-day programming competition has substantially lowered the expense of quantum-safe Bitcoin transactions. Developers using artificial intelligence reduced the projected cost by 79%, dropping it from $320 to approximately $66.
This experimental approach from StarkWare provides a backup measure for a theoretical future danger rather than an immediate solution for daily use.
What Quantum-Safe Bitcoin Actually Protects Against
Quantum-Safe Bitcoin (QSB) applies hash-based cryptography to relocate eligible Bitcoin within current consensus guidelines, eliminating the need for a soft fork or protocol modification. It targets a distinct vulnerability: a sufficiently advanced quantum computer could eventually deduce private keys from exposed public keys and misappropriate those funds.
While no such device currently exists, engineers view the potential danger as a distant scenario worth planning for.
StarkWare successfully mined the inaugural QSB transaction on the Bitcoin mainnet on August 26 utilizing MARA’s Slipstream service. Construction of the transaction demanded approximately 3,100 GPU-hours and incurred an estimated computing expense of $320.
That high cost restricted the technique’s viability. Consequently, StarkWare initiated the Quantum-Safe Bitcoin Optimization Challenge on September 16, with backing from collaborators Yukon Research and Eigen Labs, who supplied over $20,000 in rewards.
Competitors focused on two primary computational obstacles: pinning searches, which locate a valid transaction commitment, and subset selection, which determines the appropriate mix of elements. Out of 62 accepted entries—many created using AI coding assistants—processing speeds reached roughly six times their previous velocity on matching equipment.
Evaluations performed on an RTX 4090 GPU demonstrated that pinning performance accelerated from roughly 146 million checked candidates per second to in excess of 880 million. That enhancement reduced the projected expense from $320 to around $66 or $67.
That price point has not yet been proven through a secondary mined transaction, accounts solely for GPU computing power, and omits network fees.
Is Bitcoin’s Broader Quantum Defense Keeping Pace?
StarkWare’s competition forms part of a much broader, rapidly evolving domain. The National Institute of Standards and Technology (NIST) completed its official post-quantum cryptography guidelines in August 2024, establishing a 2035 transition deadline for federal organizations, while Google established an internal goal of 2029.
A research study from Google Quantum AI released in March 2026 heightened the pressure by lowering the estimated number of qubits needed to crack Bitcoin’s encryption by about 20 times. This development accelerated certain specialist forecasts from decades away into the early 2030s.
Concurrently, the Bitcoin developer network introduced BIP-360, a quantum-resistant address recommendation that reached a testnet involving more than 50 participating miners in March 2026.
However, industry specialists hold differing views regarding the timeframe. Stanford cryptography expert Dan Boneh—who helped write Google’s March publication—cautioned that a rushed migration might trigger a catastrophic software error sooner than a genuine quantum assault would occur.
This conflict highlights the true nature of StarkWare’s challenge: a single, focused, low-risk fallback mechanism developed while the sector debates the appropriate speed for modifying Bitcoin’s foundational cryptography.
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