Bitcoin Devs Float Proposal to Freeze Quantum-Vulnerable Addresses — Even Satoshi Nakamoto’s
A groundbreaking Bitcoin proposal aims to address a looming threat: quantum computers capable of breaking existing cryptographic security. Co-authored by Jameson Lopp and other researchers, the draft proposes a phased soft fork to mitigate the risk of quantum attacks targeting legacy Bitcoin wallets, including those potentially belonging to Satoshi Nakamoto. This existential threat, unlike any Bitcoin has faced before, stems from the vulnerability of current cryptographic primitives to sufficiently powerful quantum computers.
The proposal outlines three phases. Phase A, commencing three years after the implementation of BIP-360, prohibits sending funds to legacy ECDSA/Schnorr addresses, encouraging migration to quantum-resistant formats like P2QRH. Phase B, two years after Phase A, renders all legacy signatures invalid at the consensus layer, effectively freezing coins in vulnerable addresses. An optional Phase C offers a potential recovery path for frozen coins using zero-knowledge proofs, implemented through a hard or soft fork.
The urgency stems from projections that quantum computers with the capacity to break ECDSA encryption could emerge as early as 2027. Recent research suggests breaking RSA encryption may require far fewer resources than previously anticipated, highlighting the vulnerability of elliptic curve cryptography used by Bitcoin. While current quantum computers lack this capability, rapid advancements necessitate proactive measures.
The proposal’s impetus is further fueled by the recent movement of significant sums from dormant “Satoshi-era” wallets, and the fact that approximately 25% of all Bitcoin has exposed public keys, rendering them vulnerable to quantum attacks. A “Q-day” attack could involve stealthily draining funds from dormant wallets over time, delaying the broadcasting of transactions to avoid detection.
The draft proposal, currently lacking a BIP number, represents a radical departure from previous Bitcoin proposals. It presents a potential solution to ensure Bitcoin’s survival in a future dominated by quantum computing, addressing a threat that could cause significant economic disruption and damage to the entire ecosystem. The proposal’s success hinges on the community’s adoption and its ability to balance security with the preservation of user funds.
