In a major development for blockchain security, Postquant Labs has officially announced that Quip.Network will roll out post-quantum Bitcoin wallet protection using Arch Network’s Bitcoin-native smart contract layers. Notably, this innovation delivers quantum-resistant security without requiring any changes to the existing Bitcoin consensus or the need for a soft fork. As a result, the move directly addresses growing concerns around what experts call Bitcoin’s approaching “Q-Day” vulnerability.

At the same time, debate continues within the developer community regarding BIP-361, a proposal supported by contributors including Jameson Lopp. The proposal suggests phasing out quantum-vulnerable addresses over five years and freezing unmigrated coins. Importantly, this could impact millions of dormant coins, including those believed to belong to Satoshi Nakamoto. However, critics argue that such measures are overly restrictive and contradict Bitcoin’s principle of permissionless ownership.

Against this backdrop, Quip.Network introduces an alternative approach. Instead of enforcing migration, it allows users to upgrade their wallets voluntarily while avoiding potential risks tied to frozen or compromised assets. Moreover, the solution uses trustless, on-chain proofs of ownership powered by post-quantum cryptographic keys. Consequently, users gain immediate protection while also benefiting from future upgrades within the Bitcoin ecosystem.

Colton Dillion, CEO and co-founder of Postquant Labs, said:

“The Bitcoin community has delayed a fix for years, despite Satoshi himself discussing the quantum problem. Developers say any protocol upgrade could take 5-10 years, but with Quip’s approach, we provide similar protection immediately. It’s simple and works on top of Bitcoin today, using existing rules, with no community vote required.”

Unlike competing solutions that rely on external databases, Quip embeds quantum-safe keys directly into Bitcoin through Arch Network’s infrastructure. Therefore, users can access enhanced security without changing how they interact with Bitcoin wallets. Additionally, this approach ensures compatibility with future upgrades, making it both forward-looking and practical.

Furthermore, intermediate protections significantly reduce the exposure window during transactions. Typically, a Bitcoin public key becomes visible once a transaction enters the mempool, creating a race condition between miners and potential quantum attackers. While research from Google suggests future quantum attacks could occur within minutes, experts believe early quantum systems may not yet achieve such speed. Nevertheless, Quip’s solution narrows this vulnerability window to just two blocks, offering a strong defensive layer.

Dr. Richard Carback, chief technology officer and co-founder of Postquant Labs, said:

“It is much easier for Bitcoin L2’s to implement quantum protection than it is for Bitcoin core, and this approach ensures that a Bitcoin holder doesn’t have to trust Quip Network at all. The code is fully open-source and auditable. You get all of the original security guarantees, and you get increased protections automatically as the L2s implement them.”

Importantly, the system leverages WOTS+ (Winternitz One-Time Signature), a well-established post-quantum cryptographic method, combined with traditional signatures for enhanced protection. Meanwhile, a third-party audit is underway, and the code has already been released publicly to encourage transparency and community validation.

In addition, Quip.Network integrates seamlessly with Arch Network, enabling smart contract execution directly on Bitcoin’s base layer without relying on bridges or wrapped assets. This architecture allows developers to easily adopt quantum-resistant features using the newly released arch-sdk.

Matt Mudano, Co-founder and CEO of Arch Network, said:

“Bitcoin holds more value than any asset on earth and right now 34% of it is sitting in quantum-vulnerable addresses. That’s not a theoretical risk, that’s a real infrastructure gap. What Quip is doing on Arch closes that gap natively; no bridges, no wrapping, no protocol changes. That’s how you protect Bitcoin without compromising what makes it Bitcoin.”

Looking ahead, Quip.Network also offers flexible options for users who prefer not to move funds into new wallets. Instead, they can register quantum-safe keys that verify ownership if a future attack occurs. Ultimately, this layered approach ensures both adaptability and resilience as quantum computing continues to evolve.

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