HIPAA-Compliant Patient Data Batch Anonymization Script

Design a Bash shell script that can securely anonymize patient medical records across multiple file formats (CSV, JSON, XML) while maintaining HIPAA compliance. The script must: 1) Automatically detect and replace personal identifiers like names, social security numbers, and unique patient IDs with randomized tokens, 2) Preserve critical medical information like diagnosis codes and treatment dates, 3) Generate a secure audit log tracking all anonymization processes, 4) Support recursive processing across nested directories, and 5) Implement multiple encryption layers to prevent data reconstruction.