A quantum‑computing collective often known as Undertaking Eleven has thrown down a public gauntlet to the worldwide cryptography group, providing a reward of 1 Bitcoin to the primary staff that may break a intentionally down‑scaled model of Bitcoin’s elliptic‑curve cryptography utilizing a real quantum laptop earlier than 5 April 2026.
Saying what it calls the “Q‑Day Prize” on X, the group wrote: “We simply launched the Q‑Day Prize. 1 BTC to the primary staff to interrupt a toy model of Bitcoin’s cryptography utilizing a quantum laptop. Deadline: April 5, 2026. Mission: Defend 6 M BTC (over $500 B).” The put up crystallises a priority that has hovered over the Bitcoin ecosystem for greater than a decade: the eventual arrival of huge‑scale, error‑corrected quantum {hardware} able to operating Shor’s algorithm in opposition to actual‑world keys.
Undertaking Eleven is just not asking contestants to shatter Bitcoin’s 256‑bit curve immediately. As an alternative, groups should show Shor’s algorithm in opposition to elliptic‑curve keys starting from one to twenty‑5 bits—sizes derisively known as “toy” by skilled cryptographers however nonetheless orders of magnitude past what has been publicly achieved on bodily quantum processors. The organisers argue that even a 3‑bit break could be “large information,” as a result of it might present the primary quantitatively verifiable benchmark of quantum progress on the elliptic‑curve discrete‑log drawback (ECDLP). Of their phrases, “No person has rigorously benchmarked this menace but.”
To qualify, a submission should embody gate‑degree code or specific directions runnable on precise quantum {hardware}, together with a story of strategies employed, error‑charges managed and the classical put up‑processing required. Hybrid assaults that lean on classical shortcuts are disallowed. All entries will probably be printed, a call the group frames as an train in radical transparency: “As an alternative of ready for breakthroughs to occur behind closed doorways, we consider in going through this problem head‑on, in a clear and rigorous method.”
Why 1 Bitcoin—And Why Now?
Bitcoin’s safety finally rests on the hardness of the discrete‑logarithm drawback over the secp256k1 curve. Whereas classical assaults scale exponentially, Peter Shor’s 1994 quantum algorithm may in precept remedy the issue in polynomial time, collapsing the price from cosmic to merely gargantuan. Present analysis estimates that on the order of two thousand totally error‑corrected logical qubits—maybe backed by tens of millions of bodily qubits—could be ample to threaten a 256‑bit key. Firms such as Google, IBM, IonQ and newcomer QuEra are racing to cross the 4‑digit logical‑qubit threshold, although none has publicly demonstrated something near that functionality right now.
Undertaking Eleven says its prize is meant much less as a bounty and extra as a diagnostic. Greater than ten million Bitcoin addresses, holding over six million cash, have already uncovered their public keys via prior spending exercise. If quantum expertise crosses the vital threshold earlier than these cash are migrated to put up‑quantum addresses, the funds could be susceptible to rapid theft. “Quantum computing is steadily progressing,” the group warns. “When that occurs, we have to know.”
The initiative lands amid a flurry of quantum‑resilience proposals throughout the wider Bitcoin ecosystem. Earlier this month, a gaggle of builders submitted the Quantum‑Resistant Handle Migration Protocol (QRAMP), a Bitcoin Enchancment Proposal that might orchestrate a community‑broad transfer to put up‑quantum key codecs. As a result of QRAMP would require a consensus‑breaking onerous fork, its political prospects stay unsure.
Individually, Canadian startup BTQ has pitched an unique proof‑of‑work different known as Coarse‑Grained Boson Sampling, which might substitute right now’s hash‑primarily based mining puzzles with photonic sampling duties executed on quantum {hardware}. Like QRAMP, BTQ’s idea calls for a tough fork and has but to garner broad assist.
From a technical standpoint, operating even a 5‑bit elliptic‑curve model of Shor’s algorithm is brutally unforgiving: qubits with fidelities above 99.9 %, coherent for a whole lot of microseconds, and orchestrated via deep circuits numbering within the 1000’s of two‑qubit gates could be required. Error‑correction overhead additional compounds the engineering burden, which means that contenders will possible should make use of small‑code logical qubits and spectacular compilation methods merely to maintain noise underneath management.
But the prize could show irresistible for college labs and company R&D groups wanting to show sensible quantum benefit. Cloud‑accessible units from IBM’s Quantum System Two, Quantinuum’s H‑collection and OQC’s superconducting platforms already permit restricted, pay‑per‑shot entry to dozens—or in IBM’s case, a whole lot—of bodily qubits. Whether or not any of these machines can maintain the circuit depth mandatory stays to be seen.
Both end result provides invaluable knowledge. Within the phrases of Undertaking Eleven’s launch tweet, the target is stark: “Break the most important ECC key with Shor’s algorithm. The reward: 1 BTC + go down in cryptography historical past.”
At press time, BTC traded at $84,771.
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