Abstract
In this paper, we propose the ticket-based delegation service for the multiple domain models. This scheme presents an extension to the Kerberos [4] framework using public key cryptosystem [13]. This proposed model, based on CORBAsec [1, 3, 12], supports the protection of the high-level resources and the preservation of the security policies of the underlying resources that form the foundation of various domains, between the Kerberized do-mains[ 14] and the Non-Kerberized domains. Also we achieved the flexibility of key management and reliable session key generation between the client and the provider using the public key cryptosystem based ticket.