Which term describes the creation of a new instance of data while maintaining the same identifier?

The term that describes the creation of a new instance of data while maintaining the same identifier is polyinstantiation. This concept is particularly relevant in security contexts where multiple instances of a data object must coexist without being distinguished by identifiers alone.

In scenarios where data sensitivity and access control are critical—such as in multilevel security systems—polyinstantiation allows for different users with varying clearance levels to access different instances of the same data identifier. For example, an unclassified user might see a certain instance of an identifier that refers to less sensitive information, while a higher clearance user might see a different instance containing more sensitive details.

This practice ensures that data integrity and confidentiality are preserved, as it enables the system to manage multiple views or levels of information effectively. Such functionality is vital in environments that require strict adherence to access control measures, making polyinstantiation a necessary tool for secure data management.