PANews May 2 news, according to CoinDesk, Paradigm partner Dan Robinson proposed a new solution called "Provable Address-Control Timestamps" (PACTs) intending to reserve a quantum-safe rescue channel for early Bitcoin addresses before quantum computers emerge. This solution allows holders to generate a signature proving current control of a certain address using BIP-322, and combines random salt to privately timestamp on the chain through OpenTimestamps, without moving assets for the time being. If in the future Bitcoin freezes old addresses vulnerable to quantum attacks through a soft fork, the network can accept zero-knowledge proofs submitted by holders after the introduction of quantum-resistant STARK verification, verifying that they had controlled that address before the quantum era, thereby releasing frozen assets. This solution also provides an additional rescue path for BIP-32 wallets not covered in BIP-361, but the prerequisite is that the address holder must actively create a commitment before a quantum attack or community freeze.

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