What does "data at rest" refer to in the context of encryption?

In the context of encryption, "data at rest" refers specifically to data that is stored and not actively being transmitted or processed. This includes files saved on local hard drives, databases, and cloud storage solutions where the information is stationary. The encryption of data at rest is a crucial security measure because it protects sensitive information from unauthorized access when it is not being used, ensuring that even if an attacker gains physical access to the storage medium, they cannot easily read the data without the appropriate decryption keys.

The concept of protecting data at rest emphasizes the need for encryption to safeguard personal data, intellectual property, and other sensitive information that could be compromised if left unprotected. By encrypting data at rest, organizations comply with regulatory requirements and strengthen security protocols against potential data breaches.