Couchbase Server 6.5 introduces new capabilities for configuring TLS cipher suites, enhancing the security of data exchanges by allowing users to select specific ciphers. Cipher suites are crucial for securing network connections through TLS, involving a combination of protocols and algorithms for encryption, key exchange, authentication, and message verification. In Couchbase 6.5, users can specify which cipher suites to use, with the server defaulting to the strongest common option if none is specified. The blog provides guidance on configuring these settings and verifies their implementation through command-line examples. This flexibility ensures that users can maintain high security standards by adopting the latest ciphers. The blog encourages users to explore Couchbase 6.5's features and offers additional resources for further learning.