QuFi Unveils Quantum-Resistant Verification System with Bitcoin Testnet Implementation
The QuFi Network has introduced a post-quantum verification system along with uBTC, a proof-of-concept on Bitcoin Testnet4 aimed at mitigating quantum computing risks.
QuFi Network, a company specializing in post-quantum infrastructure, has rolled out a verification platform engineered to safeguard digital assets from emerging quantum computing risks while avoiding the need for modifications to current blockchain settlement networks.
The system employs a separation strategy between verification and settlement processes, leveraging a decentralized node network to authenticate transactions through post-quantum cryptographic methods prior to their settlement on established blockchain networks.
Alongside the platform, QuFi introduced uBTC, a proof-of-concept implementation that integrates the verification framework with Bitcoin (BTC), presently running on Bitcoin Testnet4. The uBTC infrastructure validates BTC collateral and creates cryptographic proofs that control the movement of value across different settlement environments, with redemption processes ultimately concluding as conventional Bitcoin transactions.
The system incorporates three post-quantum cryptographic standards — ML-DSA-65, SLH-DSA and ML-KEM-1024 — which handle digital signatures and facilitate secure key exchange protocols.
According to QuFi, the external verification layer approach is designed to circumvent the additional storage requirements, bandwidth consumption and computational overhead that typically accompany the direct integration of larger post-quantum signatures on individual blockchain networks.
Crypto ramps up quantum defenses
The verification platform emerges during a period marked by multiple recent initiatives aimed at fortifying blockchain networks against prospective quantum computing risks.
In August, StarkWare successfully tested a quantum-resistant Bitcoin transaction on the mainnet that did not necessitate a fork. Nevertheless, the transaction required several hours of computational processing and incurred costs of approximately $150 to $200, with its nonstandard structure requiring direct submission to a mining operator.
During the same month, financial institutions and regulatory bodies spanning Europe, the Middle East and Asia participated in a pilot program evaluating post-quantum wallets and onchain transfer capabilities using ML-DSA-65, which represents one of the identical cryptographic standards integrated into QuFi's platform architecture. Concurrently, the Ethereum Foundation removed the Poseidon hash function from its proposed post-quantum architecture, opting instead for proven alternatives including SHA or BLAKE.
Bitcoin developers are simultaneously investigating protocol-level protective measures. In August, research teams from Blockstream released a Bitcoin Improvement Proposal for SHRINCS, an experimental post-quantum signature scheme engineered to minimize the size and performance overhead associated with quantum-resistant cryptographic signatures.
The methodology involves certain compromises. SHRINCS employs stateful signatures as a means to compress their size, which necessitates that wallets maintain records of previously utilized signing keys. The scheme continues to exist in an early developmental phase without a finalized security proof, and its architecture introduces additional complexity along with potential failure scenarios for users.