Post Quantum Authorisation layer for D-Apps and Stable-coins

Quantum computing is moving from theory to practice. The cryptographic schemes securing digital assets - notably RSA and ECDSA - are precisely those quantum machines are designed to defeat. Attackers can already capture public data today and decrypt it later as capabilities mature. In other words, assets that appear safe now may be exposed within the decade.

The Problem

• Harvest-now-decrypt-later attacks have begun - adversaries stockpile keys, transaction metadata and addresses for future decryption.

• Protocol-level remediation is slow and costly - hard forks, validator coordination and wallet migration impose significant operational risk.

• Many post-quantum algorithms are heavier - larger keys and signatures increase on-chain costs and degrade user experience.

Quantzen’s Approach

Quantzen delivers quantum resilience at the application layer - without rewriting smart contracts or altering user experience.

Dual-signature defence

Transactions carry two signatures:

1. Conventional - ECDSA for backward compatibility.

2. Post-quantum - a quantum-resistant signature from the Dilithium or Kyber family.

Both must verify for approval. If ECDSA is ever compromised, the quantum-safe signature still prevents forgery.

Developer-first, chain-agnostic

• Lightweight SDKs in JavaScript and TypeScript.

• Fast integration - typically completed within a single development session.

• Works across ecosystems - Ethereum, Solana, Polygon, Aptos, Bitcoin and others.

Minimising gas with ZK proofs

Post-quantum artefacts are sizeable. Quantzen uses zero-knowledge proofs to attest off-chain verification of the quantum-safe signature while recording succinct proof data on-chain. This preserves security while containing gas costs and latency.

Built for cryptographic agility

Quantzen’s architecture supports rapid upgrades as NIST-standardised schemes evolve. The platform functions as a cryptographic control plane that adapts as standards and threat models change.

Key Takeaways

• Quantum computing endangers today’s public-key cryptography, including RSA and ECDSA used across Web3.

• Harvest-now-decrypt-later tactics are a present risk.

• Protocol upgrades alone are slow and disruptive, leaving assets exposed in the interim.

• Quantzen provides dual-signature protection at the application layer - no chain changes required.

• Chain-agnostic SDKs enable immediate reinforcement for Ethereum, Solana, Aptos, Bitcoin and more.

• Zero-knowledge proofs mitigate on-chain overhead from larger post-quantum signatures.

• Cryptographic agility is built in, aligning with emerging standards.

Market Classification

Sector: Web3 Security
Segment: Post-Quantum Cryptography, Application-layer Security

Sub-markets and adjacent domains:

• Blockchain infrastructure

• Crypto wallets and exchanges

• Secure communications in Web2

• Fintech and banking APIs

• IoT data protection

Competitor categories:

• Protocol-level PQC initiatives

• Hardware security modules

• Zero-knowledge rollup frameworks

• Multi-signature wallet providers

Market Outlook and Demand Drivers

• Market growth - the global PQC market is projected to reach approximately $9.5 billion by 2030.

• Exposure - Web3 digital assets at risk exceed $2 trillion.

• Regulatory momentum - accelerating enterprise adoption as post-quantum requirements emerge.

• Drivers - quantum milestones from major vendors, rising awareness of cryptographic expiry and government pressure to adopt quantum-safe standards amid expanding Web3 use in finance, supply chains and AI.