Extensible access control for a hierarchy of servers

Author:

Bacon Jean1,Hayton Richard1,Lo Sai Lai1,Moody Ken1

Affiliation:

1. University of Cambridge, Computer Laboratory, New Museums Site, Pembroke Street, Cambridge CB2 3QG England

Abstract

We discuss the protection requirements of a distributed storage service comprising a two-level hierarchy of storage servers with value-adding service layers above them. A flexible and extensible access control mechanism is required. Our scheme uses Access Control Lists (ACLs) to allow fine grained expression of policy together with capabilities for efficient runtime access after a once-off ACL check. Our capabilities are principal- specific and transient and their design ensures that access to objects is via the correct service hierarchy; for example, a directory object may only be manipulated via a directory service. The implementation of this protection is stateless at the servers above the storage service. The scheme also provides a convenient means to delegate rights for an object, temporarily, to an unprivileged server, for example a print-server. The fact that our capabilities are short-lived alleviates the requirement for selective revocation and crash recovery.

Publisher

Association for Computing Machinery (ACM)

Cited by 4 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Object protection in distributed systems;Journal of Parallel and Distributed Computing;2013-05

2. Access control mechanisms in a distributed, persistent memory system;IEEE Transactions on Parallel and Distributed Systems;2002-10

3. JAC?Access right based encapsulation for Java;Software: Practice and Experience;2001

4. Secure Network Objects;Secure Internet Programming;1999

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