Kerberos is a network authentication protocol built to protect credentials from interception. In continuous integration and continuous delivery workflows, Kerberos pipelines use this protocol to secure every authentication step between services, build agents, and deployment targets. Credentials never pass in plain text. Sessions are short-lived and cryptographically verified, making replay attacks useless.
A Kerberos pipeline begins with a ticket-granting exchange. The client requests a ticket from the Key Distribution Center (KDC). The KDC responds with a time-limited ticket, encrypted using a shared secret. This ticket is presented to the pipeline service, which verifies it and issues access for only the required commands. Every stage — build, test, deploy — can demand fresh tickets or service-specific tickets to prevent privilege spread.
The benefit is clear. You get centralized authentication, strong encryption, and automatic expiration. Kerberos pipelines integrate with containerized builds, cloud deployments, and on-prem systems where Active Directory or MIT Kerberos is already in place. Service principals map directly to your CI/CD jobs, giving fine-grained control over what code can reach which environment.