Specifying and Verifying Secrecy in Workflows with Arbitrarily Many Agents

Specifying and Verifying Secrecy in Workflows with Arbitrarily Many Agents
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在具有任意多个代理的工作流中指定和验证保密性

DOI:
10.1007/978-3-319-46520-3_11
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Christian Müller
Christian Müller
中科院分区:
--
文献类型:
--
作者:
Bernd Finkbeiner;Helmut Seidl;Christian Müller

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基于web的工作流管理系统,如EasyChair、HealthVault、Ebay或Amazon,通常处理机密信息,如审阅者的身份、健康数据或信用卡号。由于工作流中参与者的数量原则上是无界的,因此很难用限定于固定数量的代理的规范语言来描述此类系统的信息流策略。我们引入了HyperLTL的一阶版本,它允许我们在具有任意多个代理的工作流中表达信息流需求。我们提出了一种有界模型检验技术,它将信息流策略的违反降低到一阶公式的可满足性。在此基础上,进一步确定了保证结果可满足性问题是可决定的条件。
Web-based workflow management systems, like EasyChair, HealthVault, Ebay, or Amazon, often deal with confidential information such as the identity of reviewers, health data, or credit card numbers. Because the number of participants in the workflow is in principle unbounded, it is difficult to describe the information flow policy of such systems in specification languages that are limited to a fixed number of agents. We introduce a first-order version of HyperLTL, which allows us to express information flow requirements in workflows with arbitrarily many agents. We present a bounded model checking technique that reduces the violation of the information flow policy to the satisfiability of a first-order formula. We furthermore identify conditions under which the resulting satisfiability problem is guaranteed to be decidable.
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