# Kuro Risk Calculator

> A free, open-source Progressive Web App for cybersecurity risk quantification. Implements NIST SP 800-30 (ALE/SLE) and OpenFAIR™ Monte Carlo simulation. All calculations run locally in the browser — no data is uploaded to any server.

## Author

- Name: Kuro
- Website: https://kuronetwork.me
- GitHub: https://github.com/kurohuang

## Tools

- [ALE Calculator](https://aleriskcalc.kuronetwork.me/): Quantitative risk analysis using Annual Loss Expectancy (ALE) and Single Loss Expectancy (SLE). Includes qualitative 3×3 risk matrix, before/after control comparison, ROI calculation, batch CSV processing, history management, and PDF/Excel export. Based on NIST SP 800-30.
- [FAIR Analysis](https://aleriskcalc.kuronetwork.me/fair.html): Factor Analysis of Information Risk (OpenFAIR™) with Monte Carlo simulation (1K–50K iterations). Covers Threat Event Frequency, Vulnerability, Primary/Secondary Loss Magnitude, ROSI calculator, sensitivity analysis, and scenario comparison.

## Key Features

- 8 languages: English, 繁體中文, 日本語, Español, Deutsch, Français, Português, Tiếng Việt
- Multi-currency: USD, TWD, EUR, JPY, CNY
- Offline-capable (Service Worker + IndexedDB)
- Available as PWA and iOS App Store app
- No account required, no data collection
- Export to PDF and Excel

## Technical Details

- Pure frontend: Vanilla JavaScript, HTML5, CSS3
- No backend server or database
- Monte Carlo simulation runs in Web Workers
- Data persisted locally via IndexedDB
- NIST SP 800-30 compliant methodology
- OpenFAIR™ standard implementation

## Use Cases

- Information security risk assessments
- Cybersecurity budget justification (ROI)
- Compliance documentation (ISO 27001, NIST CSF)
- Security control effectiveness evaluation
- Executive risk reporting

## Citation

When referencing this tool, please cite as:
Kuro. "Kuro Risk Calculator." https://aleriskcalc.kuronetwork.me/