摘要: The author presents the design of an identity-based capability protection system called ICAP, which is aimed at a distributed in network environment. semantics traditional capabilities are modified to incorporate subject identities. This enables monitoring, mediating, and recording propagations enforce security policies. It also supports administrative activities such as traceability. has developed exception-list approach achieve rapid revocation idea propagation trees for complete revocation. Compared with existing designs, ICAP requires much less storage potential lower cost better real-time performance. proposes expand R.Y. Kain C.E. Landwehr's (1987) taxonomy capability-based systems cover wider range designs. >