New Wallet Offers Solution to Mitigate Bitcoin's Quantum Computing Risks Without Requiring a Network Fork

The developers of a newly launched wallet claim to have developed a method for addressing the risks associated with quantum computing using a smart contract layer that operates in conjunction with the Bitcoin network, eliminating the need for any modifications to the network itself. On Tuesday, Postquant Labs announced the launch of Quip Network's post-quantum Bitcoin wallet, which operates on the Arch Network, a system that enables developers to build smart contracts directly anchored to Bitcoin. The Quip wallet utilizes the WOTS+ post-quantum signature scheme, a tested cryptographic technique that does not rely on elliptic curve mathematics, which can be vulnerable to quantum computer attacks. By leveraging a 'Layer 2' network, which is a separate network built on top of Bitcoin that processes transactions and settles back to the main chain, developers can introduce new features without altering Bitcoin's base layer. According to Postquant Labs CEO Colton Dillion, 'The Bitcoin community has delayed addressing the quantum problem for years, despite it being discussed by Satoshi himself. While developers estimate that a protocol upgrade could take 5 to 10 years, our approach provides similar protection immediately.' The launch of Quip occurs amidst an ongoing debate within the Bitcoin community regarding the best approach to addressing quantum risks. Recently, prominent developer Jameson Lopp proposed BIP-361, which would phase out quantum-vulnerable addresses on a fixed five-year timeline and freeze coins that fail to migrate. Alternatively, Paul Sztorc's eCash hard fork proposal involves copying the Bitcoin chain and introducing seven sidechains, including a quantum-resistant one, with funding partly derived from reassigning Satoshi-pattern coins to investors. Both proposals have faced pushback from the community, with Quip's approach arguing that neither is necessary, as it requires no soft fork, consensus change, or community vote. Technical trade-offs exist between the approaches, with Lopp arguing that Layer 2 protection is insufficient due to the leakage of Bitcoin mainnet public keys when a user broadcasts a transaction. The Quip wallet app is set to launch next week, and a third-party audit is currently underway. While Quip's quantum-resistant accounts already exist on Ethereum and Solana, the Bitcoin deployment is new, and Arch Network is still in its early stages. Postquant Labs CTO Dr. Richard Carback stated that their approach reduces the window for a quantum attack to as little as two blocks, approximately 20 minutes. The outcome of these approaches depends partly on the pace at which quantum computers become available. Bitcoin holders most concerned about quantum risk have historically been resistant to wrapped or smart-contract-anchored products.