What is meant by 'data at rest'?

Data at rest refers specifically to data that is stored on electronic media and not actively being used or transmitted. This can include files on a hard drive, databases, or any type of information saved on storage devices. The concept is important in the field of information security because data at rest can be vulnerable to unauthorized access, and understanding how to protect it is crucial for maintaining confidentiality and integrity.

The other concepts presented, such as data that is actively being transmitted, data that is being backed up, or data that is being processed, refer to different states or activities involving data. These states do not encompass the notion of "data at rest," which is solely focused on stored, inactive data. Understanding this distinction helps organizations implement effective security measures tailored to the specific conditions under which data exists.