Encryption at rest is a critical component of enterprise security in cloud environments, providing a protective layer for data stored within platforms like Elastic Cloud. As businesses increasingly depend on cloud solutions, handling data security becomes essential, with encryption at rest ensuring data remains secure within storage infrastructures. This type of encryption, distinct from encryption in transit, protects data in databases, file systems, and cloud storage from unauthorized access and complies with regulations like PCI-DSS, HIPAA, and FERPA. Despite its benefits, encryption at rest can introduce performance challenges and complexities in managing encryption keys. Elastic Cloud supports customer-managed keys, allowing enterprises to maintain control over their encryption processes, which is essential for compliance and building trust. By integrating with services such as AWS KMS, Azure Key Vault, and GCP Cloud KMS, Elastic Cloud enables businesses to encrypt their data effectively, although encryption at rest should be part of a broader, layered security strategy.