Authentication in distributed systems: theory and practice
SOSP '91 Proceedings of the thirteenth ACM symposium on Operating systems principles
A calculus for access control in distributed systems
ACM Transactions on Programming Languages and Systems (TOPLAS)
A new approach for delegation using hierarchical delegation tokens
Proceedings of the IFIP TC6/TC11 international conference on Communications and multimedia security II
A Pessimistic Approach to Trust in Mobile Agent Platforms
IEEE Internet Computing
Delegation Protocols for Electronic Commerce
ISCC '01 Proceedings of the Sixth IEEE Symposium on Computers and Communications
A Practically Implementable and Tractable Delegation Logic
SP '00 Proceedings of the 2000 IEEE Symposium on Security and Privacy
Countermeasures for mobile agent security
Computer Communications
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In mobile agent environments, cascaded delegation occurs frequently among places due to the mobility of agents. Because the existing scheme considers only the delegation between two places which participate in migration of an agent, it is inadequate in the situation that needs cascaded delegation. In this paper, we propose a delegation scheme that provides agents with secure cascaded delegation. The proposed scheme achieves the goal by nesting each delegation token within the signed part of the next immediate delegation token. We prove that the proposed scheme is secure against the attack of replaying a message and the attack of substituting a delegation token.