DDPE stands for Data-at-Rest Protection Encryption, which is the process of encrypting data stored on a device or system. Some popular synonyms for DDPE include disk encryption, file encryption, and full disk encryption. Other related terms are endpoint encryption, encryption at the endpoint, and data encryption at rest. DDPE also refers to the software used to carry out the encryption, with options including BitLocker, Symantec Endpoint Encryption, and Sophos SafeGuard. In addition to securing data from unauthorized access, DDPE also protects against data breaches, theft, and loss. Ultimately, using DDPE or one of its synonymous terms helps ensure that sensitive data is kept private and secure.