The text discusses various strategies for enhancing data security in Couchbase Server through encryption, addressing the growing concern over big data security for organizations across different sectors. It emphasizes the importance of data encryption as a protection measure against insider threats and compliance with regulatory standards. The text explores multiple levels of data protection: encryption at the application level, during data transmission (both between client-server and server-server within clusters), and on-disk encryption. Application-level encryption is recommended because the app can determine the sensitivity of the data, requiring an encryption key stored securely. Data in motion is protected using SSL to prevent interception during transmission, with Couchbase enabling secure encrypted data access and admin activities. For data replication across geographies, secure XDCR (Cross Datacenter Replication) encrypts traffic between datacenters, though it may increase CPU load. Vormetric provides a solution for transparent, policy-driven disk encryption, ensuring data at rest is secure even if the database is compromised.