A ticket, in access control, is data that authenticates the identity of a client or a service and, together with a temporary encryption key (a session key), forms a credential.
Source: IETF RFC 4120 Kerberos V5, July 2005; Conrad, E., Misenauer, S., & Feldman, J. (2010). CISSP® Study Guide. Burlington, MA: Syngress
