Which methodology could cloud data storage utilize to encrypt all data associated in an infrastructure as a service (IaaS) deployment model?

Whole-instance encryption is an effective methodology for encrypting all data associated with an infrastructure as a service (IaaS) deployment model. This approach involves the encryption of an entire virtual machine or instance, which means that all data stored on that instance, including the operating system, applications, and user data, is encrypted at rest. This comprehensive method provides robust security by ensuring that unauthorized users cannot access any data, as everything on the instance is secured.

Using whole-instance encryption also simplifies encryption management, as organizations do not need to implement separate encryption processes for individual components or data at different layers. Instead, the entire environment remains protected under a single encryption framework, making it easier to manage compliance and improve security postures.

In contrast, other methods like client-side encryption focus on encrypting data before it is sent to the cloud, which may not protect all data at rest if it resides on the server unencrypted. Sandbox encryption and polymorphic encryption don’t specifically address the broad needs of an IaaS deployment, as they are more specialized and may not cover the entire scope of data security that whole-instance encryption provides.