Security Measures:

1. Encryption: Use HTTPS to secure communication between the web application and users' browsers.
2. Authentication and Access Control: Implement strong authentication methods and restrict access to sensitive data based on user roles and permissions.
3. Secure Coding Practices: Follow secure coding guidelines to prevent vulnerabilities like cross-site scripting (XSS) and SQL injection.
4. Regular Security Audits: Conduct regular security audits and penetration testing to identify and address vulnerabilities.
5. Data Minimization: Collect only the necessary data and store it securely, using encryption and access controls.
6. Data Backup and Recovery: Implement robust backup and recovery procedures to protect against data loss.