Secure text sanitization library for LLM - replaces sensitive data with tagged placeholders.

• Detects and replaces sensitive information:
  • Hash values (SHA256, etc.)
  • API tokens / secrets
  • Email addresses
  • Phone numbers
  • Personal names (Japanese & English)
  • IP addresses
  • URLs
  • Credit card numbers
• Consistent hash for same values
• Reversible: restore original text with mapping table

pnpm add securetext

import { sanitize, restore } from 'securetext';

const original = "山田太郎のメールは[email protected]です";

// Sanitize
const { sanitizedText, mappingTable } = sanitize(original);
// sanitizedText: "[DELETED:PERSON_NAME:f7a3b2]のメールは[DELETED:EMAIL:c9d1e4]です"

// Restore
const restored = restore(sanitizedText, mappingTable);
// restored: "山田太郎のメールは[email protected]です"

MIT