Automated Student Roster Anonymization Script

Create a Bash script that securely anonymizes student personal information in CSV files for research compliance. The script must: 1) Remove specific identifiable fields like full names and social security numbers, 2) Replace with unique randomized identifiers, 3) Maintain referential integrity across multiple files, 4) Log all transformation processes, and 5) Ensure FERPA compliance with encryption. Include error handling for different file formats and sizes, with specific attention to handling large datasets from student information systems.