Securing the Ledger Against
Quantum Supremacy

A strategic analysis of implementing Post-Quantum Cryptography (PQC) in Hyperledger Fabric. Exploring the shift from ECDSA/RSA to Lattice-based signatures.

View Architecture Compare Algorithms Source code

Executive Summary

  • ☞The Risk: Shor's algorithm threatens ECDSA signatures used in Fabric MSPs.
  • ☞The Solution: Migration to NIST finalists: ML-DSA (Dilithium) or FN-DSA (Falcon).
  • ☞The Cost: PQC signatures are ~100x larger. Throughput may drop by 50-70%.
  • ☞The Fix: Hybrid architectures using IPFS for off-chain storage of heavy signatures.

The Quantum Threat Horizon

Blockchain immutability is a double-edged sword. Encrypted data captured today can be decrypted tomorrow. While hashing remains robust, the asymmetric cryptography foundation of Hyperledger is vulnerable.

Projection based on IBM Quantum Roadmaps to Fault Tolerance & Google Quantum AI Research

Vulnerability Matrix

ECDSA / RSA

CRITICAL

Completely broken by Shor's algorithm. Allows forgery of admin identities.

SHA-256 / SHA-3

MODERATE

Weakened by Grover's algorithm, but key length doubling mitigates risk.

Lattice-Based (PQC)

SECURE

NIST standardized replacements (ML-DSA, FN-DSA). Resistant to known vectors.

The Candidates: NIST PQC Standards

Not all PQC algorithms are suitable for blockchain. We compare the three primary NIST finalized standards based on recent performance benchmarks.

Algorithm Details

Recommendation: Select an algorithm above to see the verdict for Hyperledger Fabric.

The Cost of Security

PQC is a "defensive downgrade" in terms of performance. The primary bottlenecks are Key Size and Verification Time.

Impact on Throughput (TPS)

Research indicates a potential 50-70% drop in throughput when moving from ECDSA to hybrid PQC schemes due to verification overhead.

Classic Fabric (ECDSA) ~3000 TPS
Post-Quantum Fabric ~1200 TPS

Data Bloat: Signature Size Comparison

Based on I. Strugar and R. Bekić, "Performance and Applicability of Post- Quantum Digital Signature Algorithms in Resource-Constrained Environments," Algorithms, vol. 16, no. 11, p. 518, Nov. 2023

Proposed System Architecture

A full-stack, crypto-agile credentialing system featuring a custom Hyperledger Fabric Crypto Service Provider (CSP) backed by liboqs.

System Flow Topology

📱Client Applications (Flutter)
Issuer
Organization
Holder
User Wallet
Verifier
Organization
↓
⚙️Backend Server (Go)
PQC Library Stack:
Go Code ⟷ liboqs-go ⟷ Open Quantum Safe (C) ⟷ ML-DSA
↓
⛓️Hyperledger Fabric Network
Custom CSP
ML-DSA + ML-KEM
Chaincode
Issue / Verify / Revoke
↓
🗄️Storage Layer
On-Chain (Fabric)
Hashes & PQC Signatures
Off-Chain (IPFS)
Full Credentials

Interactive Diagram

Click on the components in the diagram to explore how PQC integration works across the full stack.

Note: Implementation of a Custom CSP requires modifications to Fabric core components.

Literature Review Database

Paper Title Year Publisher Type Key Insights

About Us

We are a dedicated team of undergraduate students focused on building "Post-Quantum Cryptography in Blockchain Technology: A Quantum-Resistant Credendial Verification System" as part of our senior year project.


Get in touch with us at QChain@gmail.com