New wallet offers way to tackle Bitcoin’s quantum risk without a fork

The Postquant Labs project uses Arch Network to deliver post-quantum signature protection without a Bitcoin soft fork, sidestepping both Jameson Lopp's freeze proposal and Paul Sztorc's hard fork. What to know : Postquant Labs is launching Quip Network’s post-quantum bitcoin wallet, which uses the Arch Network smart contract layer to add WOTS+ signatures without changing Bitcoin’s base protocol. The product debuts amid contentious proposals to harden Bitcoin against quantum attacks, including BIP-361’s plan to phase out vulnerable addresses and Paul Sztorc’s eCash hard fork that would reassign some Satoshi-linked coins. Quip’s backers argue their Layer 2 approach can immediately narrow the window for quantum attacks without a soft fork or consensus change, though the Bitcoin deployment, infrastructure and third-party audit are still new and incomplete.