Bitcoin’s quantum-safe protection gets 82% cheaper as researchers race to secure 6 million exposed BTC

Researchers have lowered the estimated computing expense for a specialized quantum-safe Bitcoin transaction by 82%, bringing the cost down to $59.

Figures from the Quantum-Safe Bitcoin Optimization Challenge revealed that enhancements to graphics processing software drove the projected price down from about $320 during StarkWare’s initial mainnet showcase in August, to $67 in September, and finally to $59 as of Oct. 13.

This advancement could render a specific Bitcoin defense strategy more accessible as developers look for methods to protect cryptocurrency assets from future quantum computers, avoiding the need to wait for modifications to the network’s core protocol.

StarkWare, Yukon Research, and Eigen Labs co-organized the public competition, which utilized AI-assisted coding instruments to speed up the computational searches needed for these transactions.

The most recent benchmark achieved over 1 billion verified candidates per second utilizing an Nvidia RTX 4090 GPU, marking a significant increase from the initial rate of roughly 146 million.

Nonetheless, the $59 price tag is still a hardware-dependent calculation derived from simulated GPU tasks rather than an executed production transaction. This amount excludes separate Bitcoin network fees, and specific computing phases continue to depend on provisional assumptions.

StarkWare noted that these enhancements significantly decrease the preparation cost of its suggested emergency defense strategy, with investigators now aiming for a computing price under $10.

Quantum computing advances intensify Bitcoin security race

This progress expands upon work by Avihu Levy of StarkWare, who showed in August that Bitcoin is capable of supporting a quantum-resistant spending structure while operating under current consensus rules.

Referred to as Quantum-Safe Bitcoin (QSB), this technique relies on hash-based cryptography alongside a computational puzzle to safeguard uniquely configured Bitcoin funds against threats targeting traditional digital signatures.

This method enables holders to execute necessary calculations off-chain prior to spending their coins, which may deliver protection while developers pursue wider updates to Bitcoin’s cryptographic framework.

Such investigations have taken on greater urgency as progress in quantum computing forces a revision of previous projections regarding the processing power malicious actors would require to breach cryptocurrency security.

During March, Google Quantum AI announced that forthcoming quantum computers might crack the elliptic-curve cryptography utilized by Bitcoin using far fewer resources than earlier calculations suggested.

Their team calculated that specific attacks could theoretically finish within minutes utilizing under 500,000 physical qubits under defined hardware parameters, marking roughly a 20-fold decrease compared to past forecasts.

Even though such devices exceed publicly proven capabilities, these discoveries have amplified pressure on blockchain engineers to ready the network ahead of quantum attacks becoming feasible.

The potential risk scope is considerable.

Based on research from Glassnode, around 6.04 million BTC—comprising 30.2% of the circulating Bitcoin supply at the time—featured public keys already exposed on-chain.

That total encompassed 1.92 million BTC vulnerable via their underlying address formats and an additional 4.12 million BTC exposed through habits like address reuse and past spending transactions.

A sufficiently advanced quantum adversary could theoretically extract private keys from those visible public keys to seize control of the linked coins.

This danger has sparked discussions about the urgency with which Bitcoin ought to integrate quantum-resistant cryptography, especially considering the intricacy of implementing upgrades across a decentralized network.

While QSB might present a temporary solution, it exclusively shields eligible coins whose traditional public keys stay concealed until transferred into custom-built outputs.

That prerequisite leaves currently exposed assets susceptible if a capable quantum adversary surfaces before owners finish a secure migration process.

Furthermore, the strategy encounters practical implementation barriers. Although QSB transactions adhere to Bitcoin’s consensus guidelines, standard network relay policies decline them, necessitating direct delivery to miners prepared to execute them.

MARA’s Slipstream service delivered that pathway during the August showcase.

Even so, StarkWare maintains its preference for a comprehensive Bitcoin protocol upgrade to ensure long-term security. Researchers are now tasked with displaying these latest computing cost savings through complete transactions and securing reliable miner access before QSB can function as a viable fallback option for holders.

Frequently Asked Questions

• What is Quantum-Safe Bitcoin (QSB)? QSB is an interim defense strategy utilizing hash-based cryptography and a computational puzzle to secure specially prepared Bitcoin holdings against quantum computer attacks without altering underlying consensus rules.
• Why are exposed public keys a risk? Approximately 6.04 million BTC have public keys visible on-chain due to address structures, reuse, or past spending, which a powerful quantum attacker could theoretically use to derive private keys and seize funds.
• How much does the quantum-safe protection cost now? Recent software optimizations have brought the estimated computing cost down to $59 per transaction, with researchers targeting a cost below $10.
• Is QSB ready for everyday use? No, it requires direct submission to willing miners because standard network relay policies currently reject QSB transactions.