Buried inside a brand new Bitcoin safety proposal is a provision that would save stragglers from shedding the whole lot.
Anybody who misses the improve deadline however nonetheless holds their seed phrase would have a path to restoration by means of zero-knowledge proof know-how — a last-resort mechanism constructed into the ultimate part of BIP-361, a draft posted to GitHub on Tuesday by cypherpunk Jameson Lopp and 5 co-authors.
The complete proposal is a three-phase plan designed to guard Bitcoin from a risk that has quietly grown extra severe: the eventual potential of quantum computer systems to crack the cryptographic keys defending early Bitcoin addresses.
Satoshi’s Fortune At The Heart Of It All
About 1.7 million BTC sits in old-style addresses often called P2PK — the type utilized in Bitcoin’s earliest days. These addresses expose public keys straight, making them weak as soon as quantum computing reaches ample energy.
Satoshi Nakamoto’s stash alone is valued at roughly $74 billion at present costs. In keeping with the proposal’s authors, if a nasty actor gained quantum entry to these cash, the harm to Bitcoin’s worth and credibility may very well be extreme.
New 3-step technique targets quantum danger. Supply: Github
BIP-361 builds on BIP-360, launched in February, which launched a brand new quantum-resistant handle format known as pay-to-Merkle-root, or P2MR. That earlier proposal protects new cash. BIP-361 tackles what BIP-360 left unresolved — the roughly 34% of Bitcoin’s whole provide nonetheless sitting in weak addresses.
The plan unfolds in levels. Three years after activation, sending BTC to old-style addresses would not be allowed. Two years after that, old-format signatures could be invalidated totally.
Any cash that haven’t been moved by then could be frozen. The third part — the rescue window — provides late movers a technical path to reclaim funds utilizing proof of seed possession.
BTCUSD buying and selling at $73,722 on the 24-hour chart: TradingView
The Neighborhood Response Has Been Blunt
The proposal landed laborious amongst Bitcoin’s most vocal voices. Bitcoin Journal’s editor rejected it outright. TFTC founder Marty Bent known as it “laughable.” Metaplanet’s head of enterprise growth put the contradiction plainly: “We now have to steal individuals’s cash to stop their cash from being stolen.”
The authors anticipated the backlash. Primarily based on their very own framing, the freeze isn’t meant as punishment — it’s described as a protection towards a worse consequence. Frozen cash, they argue, barely enhance the worth of everybody else’s holdings. Quantum-stolen cash do the alternative.
This quantum proposal is very authoritarian and confiscatory, however in fact, it’s from Lopp. 🚩 🚩
There isn’t any good rationale for forcing the improve and rendering outdated spends invalid. Improve ought to be 100% voluntary. pic.twitter.com/tQvJVgdPRY
— Cato The Elder (@CatoTheElder17) April 14, 2026
Protocol developer Mark Erhardt shared the proposal on X, the place pushback got here rapidly. Critics known as it “extremely authoritarian and confiscatory” and questioned whether or not any deadline may justify making current Bitcoin unspendable by its rightful house owners. Lopp had not responded to requests for remark on the time of publication.
Whether or not BIP-361 strikes ahead is determined by a consensus course of that has traditionally resisted modifications this vital. For now, it stays a draft — and a flashpoint.
Featured picture from PostQuantum, chart from TradingView
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