In the dimly lit chambers of the Coinbase Independent Advisory Board, a weighty position paper has emerged, stirring the still waters of the crypto world with its audacious claims. It warns that while the specter of quantum computing may not be knocking at our door just yet, it is high time we stop treating our post-quantum plans as a mere afterthought, like that dusty old book you keep promising to read.
This scholarly missive, birthed on April 21 by a cadre of brainiacs including Scott Aaronson, Dan Boneh, Justin Drake, Sreeram Kannan, Yehuda Lindell, and Dahlia Malkhi, boldly declares its “high confidence” that one day, amidst the rubble of oblivion, a mighty fault-tolerant quantum computer will rise. Yes, folks, your sci-fi dreams are inching closer to reality!
Coinbase Issues a Wake-Up Call to Bitcoin and Ethereum Devs
The authors do stress, in their most reassuring tones, that the feat of dismantling current public-key cryptography is still a Herculean task, necessitating machines far mightier than what we have today. The challenge remains an engineering puzzle rather than an impending apocalypse. They cite NIST’s sage advice that we ought to finish post-quantum migrations by 2035-though they admit, with a hint of sarcasm, that they aren’t entirely convinced we won’t be dealing with quantum computers before then. After all, who doesn’t love a good plot twist?
Yet, the report urges us to shake off our cozy complacency. “Waiting for it to be urgent is not a good idea,” the authors profess, as if counseling a procrastinator who’s just remembered a deadline. They suggest that the ongoing debate about timelines is largely irrelevant (except for the fact that it’s not happening any time soon) because planning must begin now. Why wait for calamity when you can prepare in style?
The advisory board posits that we need robust post-quantum protection at both the consensus layer, where validators put their stamp of approval on blocks, and the execution layer, where users sign transactions like they’re autographing a bestseller. Alas, the cleanest cryptographic solutions are often heftier than the delicate, elegant elliptic-curve systems currently in vogue-think of them as the hulking SUVs of the crypto world.
When it comes to Bitcoin, the report makes a savvy distinction between UTXOs that hide their public keys behind hashes and those unfortunate outputs where the public key has been bared for all to see. According to Project 11, around 6.9 million BTC languish in UTXOs with exposed public keys, including approximately 1.7 million BTC in older pay-to-public-key outputs-yes, those infamous Satoshi coins. One might say these are the coins most susceptible to a “harvest-now, break-later” scheme when a sufficiently capable quantum machine finally decides to grace us with its presence.
But fear not! The Bitcoin section isn’t a clarion call for panic. It notes that Grover’s algorithm is unlikely to grant quantum miners any advantages over classical ASICs anytime soon, thanks to the astronomical overhead of running such quantum searches. However, it does propose some down-to-earth mitigation strategies, such as a commit-reveal tactic for spending pre-quantum UTXOs more securely and an “Hourglass” proposal that would cap spending of exposed P2PK outputs at a modest 1 BTC per block. Think of it as turning dormant coins into a canary rather than an instant jackpot.
Ethereum, however, finds itself in a more tangled web. The authors declare that the network faces four quantum-sensitive areas: EOA transaction signing at the execution layer, BLS validator signatures at the consensus layer, pairing-based proof systems in the EVM, and KZG commitments in the data layer. Their grand plan? To pivot towards hash-based signatures for both consensus and execution, employing leanXMSS for validators and leanSPHINCS for user-level transactions, all while compressing the resultant signature load via SNARK-based aggregation. Because who doesn’t love a good compression scheme?
More broadly, the paper advocates for a gradual migration rather than a chaotic overhaul. At the consensus layer, it suggests periodic post-quantum checkpoints that can anchor prior history even before the full switch is flipped. We wouldn’t want things to be too abrupt, now would we?
At the execution layer, it proposes a “1-out-of-2” approach, allowing users to sign with either the current elliptic-curve scheme or a shiny new post-quantum alternative. This way, chains can keep costs low while preserving the option to phase out those pesky legacy signatures later. “We firmly believe that a large-scale fault-tolerant quantum computer will eventually be built,” the authors conclude, echoing the eternal optimism of dreamers. “This doesn’t mean that the threat is imminent… but the time to start preparing is now.”
As of this moment, Bitcoin is trading at a staggering $77,974.
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2026-04-22 15:56