Couchbase 7.0 introduces significant security enhancements, notably supporting Linux Unified Key Setup (LUKS) for disk encryption to secure data at rest, alongside role-based access control for Scopes and Collections. LUKS, an open-source tool and the standard for disk encryption in Linux environments, encrypts storage at the disk-block level and is compatible with Couchbase-certified Linux operating systems. Despite its robust security features, including support for multiple key slots and a 512-bit AES key, LUKS is not suitable for non-Linux platforms or users without an OS-vendor support contract, and alternatives like Microsoft Encrypted File System or third-party partners are recommended in such cases. The document details implementation steps for LUKS in a Linux environment, emphasizing its role in protecting data against unauthorized access, especially in compliance with various regulatory standards.