The QuFi Network project has officially unveiled a post-quantum verification platform designed to protect digital assets from potential threats posed by quantum computing. A key feature of the solution is that it requires no modifications to existing settlement networks.
As a testing ground for the practical demonstration, the developers utilized the Bitcoin Testnet4 environment, highlighting the experimental yet fully functional nature of the technology.
Architectural Approach: Off-Chain Verification
QuFi's fundamental innovation lies in separating the processes of transaction verification and its final execution. The platform relies on a network of independent nodes that perform cryptographic analysis before funds are moved. After successful verification, only a compact proof of the operation's correctness is transmitted to the blockchain.
This design addresses a critical scalability issue: blockchains will not have to independently process the increased volumes of data and computations inevitable with the transition to post-quantum algorithms. Instead of burdening every network node with heavy mathematical operations, QuFi offloads this work to a separate layer.
To ensure security, the platform uses three standards developed under the initiative of the U.S. National Institute of Standards and Technology (NIST): ML-DSA-65 for creating digital signatures, SLH-DSA as a backup hash-based scheme, and ML-KEM-1024 for secure key exchange.
Practical Test on Bitcoin
For a clear demonstration of its capabilities, QuFi created the uBTC protocol — a proof-of-concept that verifies the presence of real BTC as collateral and generates cryptographic proofs for subsequent value transfer.
The full lifecycle of uBTC, including issuance, burning, and redemption, operates on the Bitcoin Testnet4 network. Upon redemption, funds are sent via a standard bitcoin transaction that can be independently verified on the blockchain. Meanwhile, the underlying protocol of the first cryptocurrency remains untouched.
This is a fundamental difference from the alternative approach that involves direct integration of post-quantum algorithms into the blockchain. Given that the sizes of some post-quantum signatures significantly exceed traditional counterparts, an embedded implementation would require increased storage, bandwidth, and computational requirements.
Prospects and Limitations
However, it is premature to speak of full-fledged post-quantum protection for bitcoin. The demonstrated system operates exclusively on a test network, ruling out its application to real assets at this stage. QuFi's plans include expanding support to EVM-compatible networks, Stellar, and Solana.
In parallel, the company has launched the Genesis Node program for operators wishing to support the decentralized verification network. The project's strategic goal is to create a unified verification layer suitable for multiple blockchains and financial systems.
Notably, in August, StarkWare already conducted the first transaction on the bitcoin mainnet resistant to attacks using a quantum computer, confirming the industry's growing interest in this issue.
My analysis: QuFi's approach looks pragmatic and technologically sound, yet ensuring sufficient decentralization and security of the verifier network itself will remain a key challenge. Otherwise, we risk replacing one point of failure with another, albeit a more complex one.