Fixed-Parameter Tractability of Workflow Satisfiability in the Presence of Seniority Constraints
Fixed-Parameter Tractability of Workflow Satisfiability in the Presence of Seniority Constraints
复制标题
存在资历约束时工作流可满足性的固定参数可处理性
DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
M. Ramanujan
中科院分区:
文献类型:
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作者:
J. Crampton;R. Crowston;G. Gutin;Mark Jones;M. Ramanujan
The workflow satisfiability problem is concerned with determining whether it is possible to find an allocation of authorized users to the steps in a workflow in such a way that all constraints are satisfied. The problem is NP-hard in general, but is known to be fixed-parameter tractable for certain classes of constraints. The known results on fixed-parameter tractability rely on the symmetry (in some sense) of the constraints. In this paper, we provide the first results that establish fixed-parameter tractability of the satisfiability problem when the constraints are asymmetric. In particular, we introduce the notion of seniority constraints, in which the execution of steps is determined, in part, by the relative seniority of the users that perform them. Our results require new techniques, which make use of tree decompositions of the graph of the binary relation defining the constraint. Finally, we establish a lower bound for the hardness of the workflow satisfiability problem.
DOI:
10.1145/2487222.2487226
发表时间:
2012-05
期刊:
ACM Trans. Inf. Syst. Secur.
影响因子:
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作者:
J. Crampton;G. Gutin;Anders Yeo
通讯作者:
J. Crampton;G. Gutin;Anders Yeo
DOI:
10.1145/2462410.2462419
发表时间:
2013
期刊:
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影响因子:
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作者:
Crampton J
通讯作者:
Crampton J