StarkWare Tests Quantum-Resistant Bitcoin Transaction
Reported by Cointelegraph · AI-assisted summary by ChikoCorp AI News Desk
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Summary
StarkWare researcher Avihu Levy successfully tested an experimental quantum-resistant Bitcoin transaction on the mainnet, marking the first transaction of its kind. The transaction, confirmed in Bitcoin block 964,199, used Levy’s Quantum Safe Bitcoin (QSB) scheme, which combines hash-based one-time signatures with computational searches to prevent forgery even if quantum computers break Bitcoin's usual elliptic-curve cryptography. This demonstration shows Bitcoin’s current consensus rules can support quantum-resistant spending without requiring a protocol change.
Why it matters
The test highlights a potential safety measure against future quantum computing threats to Bitcoin’s security, providing a last-resort method for transaction authorization. StarkWare views QSB as a safety net while broader protocol-level quantum protections are still in development. The source does not elaborate on the broader market or user impact beyond the technical advancement.
Key context
Google researchers estimated in March that a powerful quantum computer could derive a Bitcoin private key within minutes of its public key’s exposure, posing a risk of transaction replacement during confirmation. Levy introduced QSB in April as a costly but possible countermeasure requiring significant GPU computation and classifying such transactions as nonstandard under Bitcoin Core policies. The transaction took several hours and cost between $150 and $200 to generate, and cannot be propagated by ordinary nodes, needing direct submission through MARA’s Slipstream service. Separate Bitcoin developer proposals like BIP-360 are also considering soft forks for enhanced quantum resistance.
Key numbers and entities
StarkWare, Avihu Levy, MARA Pool, Nathan Jeffay, Eli Ben-Sasson, Google researchers, Bitcoin block 964,199, 10,000 satoshi output, transaction cost approximately $150 to $200.
What remains unclear
The source does not clarify how widely QSB might be adopted or integrated into Bitcoin’s ecosystem, the timeline for potential protocol changes like soft forks, or the practical implications for everyday users and transactions beyond this experimental test.