Objective: If medical information is integrated for management purposes, the efficiency of the system may increase. In addition, diagnostic abilities of physicians may be improved through the increased speed and accuracy of information processing. Medical databases must ensure high performance in terms of speed and reliability. In addition, access to medical information must be restricted to persons with proper authorization to ensure the privacy of patients.

Methods: Thus, the security of medical database systems with multiversion data requires both the existing management system and security policies.

Results: This study simulates the performance of a dynamic multiversion data management system in terms of security levels and update operations.

Conclusion: The results show that a dynamic multiversion data management system increases disk availability more than a double version system. In addition, if the number of security levels is small, throughput will be improved because the security overhead will be low. However, frequent update operations will decrease throughput whenever versions are created at each interval.