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Authorization systems today are increasingly complex. They span domains of administration, rely on many different authentication sources, and manage permissions that can be as complex as the system itself. Worse still, while there are many standards that define authentication mechanisms, the standards that address authorization are less well defined and(More)
Many grid usage scenarios depend on small, dynamic working groups for which the ability to establish transient collaboration with little or no intervention from resource administrators is a key requirement. The system developed, PRIMA, focuses on the issues of management and enforcement of fine-grained privileges. Dynamic account creation and leasing as(More)
Public Key Infrastructures suffer from usability and security problems associated with the request for and secure management of end user credentials. Online credential repositories provide mechanisms to ease these shortcomings but pose attractive targets for attacks due to the accumulation of credentials and the need for remote access to these credentials.(More)
This paper is a brief review of current research in software metrics. Such metrics are quantitative measures of attributes relating to the quality of a software system. The attributes of interest in this paper are factors of the software product which are important to individuals who are constructing or maintaining a software system. Th e metrics reviewed(More)