According to Paradigm, researcher Dan Robinson recently proposed Provable Address-Control Timestamps (PACTs), a model designed to protect dormant bitcoins, including those associated with Satoshi Nakamoto, from quantum computing threats. The system allows bitcoin holders to prove wallet ownership and timestamp that proof on the blockchain, creating an ownership record that could later be unlocked on a quantum-resistant version of Bitcoin. Unlike migration-window approaches such as BIP-361, PACTs enables users to establish ownership proof without broadcasting activity onchain, protecting privacy for long-dormant addresses. The proposal comes as quantum computing advances incrementally; last week, an independent researcher derived a 15-bit elliptic curve key using quantum hardware, the largest such attack to date, though Bitcoin currently relies on 256-bit encryption.
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