Project Eleven published a report on Wednesday proposing that the inflection point of quantum computers breaking modern encryption, often referred to as “Q-Day,” could come as early as 2030, with a breakthrough described as “more likely than not” by 2033. The startup, focused on post-quantum security, predicts that quantum advancements will happen in sudden leaps rather than a slow and linear progression, with progress in hardware and algorithms compounding into major capability jumps.
Quantum Advancement Mechanism
Project Eleven describes the expected pace of quantum progress as “nothing, and then all at once.” Recent demonstrations partially support this theory. Last month, a researcher derived a 15-bit elliptic curve key using quantum hardware. While notable, this remains a significant distance from the 256-bit encryption used in cryptocurrencies like Bitcoin.
Bitcoin Exposure Risk
About 6.9 million bitcoins, currently worth more than $560 billion, could be exposed to quantum risk under certain conditions, according to Project Eleven’s estimates.
Race to Upgrade
Even if Q-Day is years away as researchers predict, mass migration to quantum-resistant wallets and addresses could take just as long. The report points to a theory known as Mosca’s inequality, which essentially states that if a system takes longer to upgrade than the threat takes to arrive, it is already behind. This reasoning is already driving early responses across the crypto industry.
One recent proposal from Paradigm researcher Dan Robinson would let bitcoin holders prove ownership of wallets today via timestamps, which could be used to reclaim funds on some later quantum-safe version of Bitcoin without revealing onchain activity.
Other approaches, like BIP-361 from Jameson Lopp and others, would involve a multi-year migration window for users to move funds to quantum-resistant addresses.
The quantum security challenge extends beyond the crypto sector. Tech giants like Google are moving up their timelines, targeting a 2029 migration to quantum-resistant cryptography.
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