Postquant Labs launches Bitcoin wallet to address quantum risk without network fork

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Bitcoin wallet for quantum protection

Highlights

Postquant Labs unveiled Quip Network's post-quantum Bitcoin wallet, leveraging Arch Network and WOTS+ signatures to provide quantum-resistant security via Layer 2 without requiring a network fork.
Recent proposals for Bitcoin's quantum risk, including BIP-361 and Paul Sztorc's eCash fork, face resistance from the community, while Quip's Layer 2 approach garners criticism over incomplete mainnet protection.
Quip's wallet launches next week pending third-party audit completion, and narrows the quantum attack window to about 20 minutes, but Bitcoin deployment remains unproven as Arch Network is early-stage infrastructure.

Wallet design uses Arch Network layer

As first reported by CoinDesk, Postquant Labs said it unveiled Quip Network's post-quantum Bitcoin wallet on Tuesday through an email announcement. The wallet runs on Arch Network, which allows developers to build smart contracts anchored directly to Bitcoin rather than relying on a separate chain or wrapped tokens.

Quip adds the WOTS+ signature scheme, short for Winternitz One-Time Signature, on top of Bitcoin's existing security model. The company says this tested cryptographic method avoids the elliptic curve mathematics that a sufficiently advanced quantum computer could break, letting users gain added protection through a Layer 2 design instead of a base-layer upgrade.

Postquant Labs CEO Colton Dillion said in a statement that the Bitcoin community has delayed a response to the quantum issue for years and that protocol upgrades could still take five to 10 years. He said Quip is intended to deliver similar protection immediately, without a soft fork, consensus change or community vote.

Competing proposals and technical limits shape debate

The launch comes as developers and investors argue over how Bitcoin should prepare for quantum risk. BIP-361, proposed two weeks ago by Jameson Lopp and five others, would phase out quantum-vulnerable addresses over five years and freeze coins that do not migrate, including the roughly 1.1 million bitcoin attributed to Satoshi Nakamoto.

Paul Sztorc has advanced a different route through an eCash hard fork that would copy Bitcoin's chain and include seven sidechains, one of them quantum-resistant. That proposal would partly fund itself by reassigning Satoshi-pattern coins on the new ledger to investors, and it has also drawn resistance from the community.

Quip's approach rejects both paths, but it also faces criticism. Lopp argues Layer 2 protection remains incomplete because Bitcoin mainnet public keys still become visible when a user broadcasts a transaction, potentially giving a future quantum attacker a target.

The product also still carries execution risks. The wallet launches next week rather than immediately, a third-party audit is underway but not finished, and while Quip's quantum-resistant accounts already exist on Ethereum and Solana, the Bitcoin deployment is new and Arch Network remains early-stage infrastructure.

Postquant Labs CTO Dr. Richard Carback said the design narrows the window for a quantum attack to as little as two blocks, or roughly 20 minutes. The broader market question remains tied to how quickly practical quantum computers arrive, especially as many Bitcoin holders most concerned about the threat have historically resisted smart-contract-based or wrapped-asset solutions.

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