About

Why This Tool Exists

The Bitcoin ecosystem lacks a simple, public tool that surfaces which specific addresses are quantum-vulnerable — not just whether the threat is theoretical. Most quantum-risk discussions are abstract; this scanner makes them concrete by classifying each address against on-chain data.

This project was built to support a Substack research series on Bitcoin's quantum transition. The goal is to give individual holders and institutional custodians the information they need to prioritize migration work before a cryptographically-relevant quantum computer (CRQC) arrives.

Methodology Reference

Ray, A., Gautam, K., & Ryan, M. (2026). Quantum Threat Assessment for Public-Key Cryptographic Infrastructure. Proceedings of the IEEE Symposium on Security and Privacy.

The CRQC timeline scenarios and risk score formula in this tool are based on the framework formalized in this paper. This tool is independent research and is not endorsed by the paper's authors.

Technical Stack

Next.js App Router · TypeScript · Tailwind CSS
shadcn/ui components · Recharts for portfolio charts
Papa Parse for CSV handling · bitcoin-address-validation for type detection
mempool.space primary API · Blockstream Esplora fallback
CoinGecko for BTC/USD price
Vitest + Testing Library · Playwright E2E

Open Source

This project is released under the MIT License. Contributions, bug reports, and pull requests are welcome.

View on GitHub Read the Methodology Scan an Address

Disclaimer

This tool is provided for informational purposes only. It is not financial advice. Classifications and risk scores are based on publicly available on-chain data and probabilistic models of CRQC development timelines. No warranty is made regarding accuracy. Always verify critical decisions with a qualified security professional.