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Bitcoin gets its first working prototype of quantum-resistant wallet rescue tool

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Key initiatives aimed at quantum-proofing the world's largest blockchain

A top Bitcoin developer says he’s built something the community has debated for years but never actually produced: a way to rescue ordinary wallets if the network is ever forced to defend itself against a quantum computer.

Olaoluwa “Roasbeef” Osuntokun, chief technology officer at Lightning Labs, unveiled the working prototype in an April 8 post to the Bitcoin developer mailing list. The tool targets a specific and uncomfortable flaw in Bitcoin’s long-term defense plan, a widely discussed “emergency brake” upgrade designed to protect the network from quantum attacks could also lock millions of users out of their own funds. Osuntokun’s proposal is an escape hatch.

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Bitcoin relies on a form of encryption that could, in theory, be broken by sufficiently powerful quantum computers. If that happens, public data already visible on the blockchain could be turned into private keys, allowing attackers to seize funds.

One leading proposal, known as BIP-360, was merged into Bitcoin’s improvement-proposal repository in February as a draft. It would give users a new, quantum-resistant type of wallet to migrate their funds into ahead of any threat.

But migration takes time, and not everyone will move in time. That’s why developers have also been discussing a more drastic backstop — the “emergency brake.”

Every Bitcoin transaction today is authorized by a digital signature, a piece of cryptographic math that proves the sender owns the coins. Those signatures are exactly what a quantum computer would be able to forge.

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The emergency brake would shut off Bitcoin’s current signature system network-wide, before an attacker could start draining wallets. Think of it as cutting power to the locks when you realize the keys have been copied.

The problem is what happens to everyone still inside. Most modern wallets — especially the single-user Taproot wallets introduced to Bitcoin in 2021 and now common across the ecosystem — rely on that signature system and nothing else to authorize spending. If it gets switched off, those wallets have no second way to prove ownership.

The coins inside them would be stranded, untouchable even by their rightful owners. The same upgrade designed to protect users could also freeze them out permanently.

Osuntokun’s prototype is designed to give those wallets a second way. Instead of proving ownership with a digital signature — the very mechanism a quantum attack would break and the emergency upgrade would disable — his system lets a user mathematically prove they were the one who originally created the wallet, using the secret “seed” that every Bitcoin wallet is generated from.

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Crucially, the proof doesn’t require revealing the seed itself, so using it to rescue one wallet doesn’t compromise any others derived from the same seed. In effect, it replaces “I can sign this transaction” with “I can prove this wallet came from me.”

The prototype is already functional. Running on a high-end consumer MacBook, generating the proof took about 55 seconds, while verification took under two seconds. The resulting proof file was roughly 1.7 MB, about the size of a high-resolution image. Osuntokun said the system was built as a side project and remains unoptimized.

Right now there is no formal proposal to add it to the Bitcoin blockchain, no deployment timeline, and developers remain divided on how urgent the quantum threat actually is.

Academic researchers note that many widely cited quantum “breakthroughs” rely on simplified test conditions, and large-scale attacks on Bitcoin’s mining system would run into hard physical limits. But the risk to exposed wallets is considered real enough that developers have been sketching defensive upgrades for years.

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Markets reflect that uncertainty. On Polymarket, traders currently assign roughly a 28% chance that BIP-360 is implemented by 2027.

But the prototype closes a gap that had lingered in theory: how to protect Bitcoin from a future threat without the collateral damage of locking users out of their wallets.

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Crypto World

Fed Officials Still See Room for a Rate Cut Before the End of 2026

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Federal Reserve, US Government, Inflation, Interest Rate

US Federal Reserve members were split on whether the war in the Middle East could spur further interest rate cuts before the end of 2026, according to minutes from the Federal Open Market Committee’s (FOMC) March meeting.

On Wednesday, the Fed released minutes from its last FOMC meeting on March 17 and 18. The meeting ended with an 11-1 vote to keep rates steady at 3.5% to 3.75%, with many officials cautious about the potential impacts of war and what it could mean for the economy.

Amid a risk of further conflicts, the official consensus pointed to a potential rate cut this year, but as Fed officials noted in the minutes, only if inflation does not get out of control.

“Many participants judged that, in time, it would likely become appropriate to lower the target range for the federal funds rate if inflation were to decline in line with their expectations,” according to the Fed minutes.

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Rate cuts are generally seen as a positive catalyst for crypto as they free up investment liquidity and can spur demand for speculative investments. The last interest rate cut was Dec. 10, 2025, with the Fed slashing rates by 25 basis points.

Federal Reserve, US Government, Inflation, Interest Rate
Fed Chair Jerome Powell speaking at the March 18 FOMC news conference. Source: Federal Reserve

While a cut may still be on the table for this year, the general feeling from the FOMC meeting was that it was “too early to know how developments in the Middle East would affect the U.S. economy.”

The FOMC’s next meeting is scheduled for April 28-29.

Cuts still possible, but so are hikes

While some officials were cautiously optimistic about a rate cut, others warned that the opposite might be necessary.

“Some participants judged that there was a strong case for a two-sided description of the Committee’s future interest rate decisions … reflecting the possibility that upward adjustments to the target range for the federal funds rate could be appropriate if inflation were to remain at above-target levels.”

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Related: Iran weighing crypto tolls for ships using Strait of Hormuz: Report

Inflation was not the only concern, as many officials pointed to potential downside risks in the labor market, arguing that “in the current situation of low rates of net job creation, labor market conditions appeared vulnerable to adverse shocks.”

According to the CME Group’s FedWatch tool, there is currently a 75.6% chance that the Fed will keep rates at 3.5% to 3.75% during the Fed’s Dec. 8 meeting later this year. 

Meanwhile, the chance of a rate cut is 20.4%, while the chance of a rate hike is 2.4% at the time of writing.

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