What is necessary when confirming compliance for mobile encryption according to AC.L2-3.1.19?

The necessity of identifying all mobile devices processing Controlled Unclassified Information (CUI) aligns directly with the intent of ensuring compliance with mobile encryption requirements outlined in AC.L2-3.1.19. This control emphasizes the importance of knowing which devices have access to sensitive data in order to manage and protect it effectively.

By identifying all mobile devices that handle CUI, organizations can implement appropriate security measures, including encryption protocols needed to safeguard this information. This step is crucial for maintaining data integrity and compliance with regulatory standards, as it allows organizations to monitor devices for vulnerabilities, ensure that encryption is properly applied, and address any potential risks that may arise from unauthorized access or data breaches.

In contrast, the other options do not fulfill the compliance requirement as effectively. Regular updates of mobile apps could be part of a broader security strategy but does not directly relate to confirming encryption compliance. The removal of encryption software would compromise data security, making it impossible to confirm compliance. Granting access to every user runs counter to principles of least privilege and would increase the risk of data exposure, thereby violating security protocols.