HIPAA-Compliant Patient Data Anonymization Middleware

Design a Laravel middleware that automatically anonymizes sensitive patient data during API transmission, ensuring HIPAA compliance. Create a robust encryption strategy that allows selective field masking, with configurable rules for different user roles and access levels. Implement a reversible anonymization technique that maintains data utility for research while protecting individual patient identities. Include a comprehensive logging mechanism that tracks all anonymization events without storing personally identifiable information.