关键词: 云工作流, 数据资源私有性保护, 工作流调度, 中国墙模型

Abstract: To solve the data privacy problem of cloud workflows,a cloud workflow scheduling method to protect data privacy was presented.Aiming at the coexistence of dependent relationship and mutex relationship among data resources,a privacy policy model of cloud workflow to extend Chinese wall model was proposed for precisely tackling the conflict-of-interest problem during resource allocation.A privacy policy description language was proposed,which could formulize the privacy policies as a set of logic rules so that the consistency of the privacy policies could be analyzed and verified by logic reasoning.Based on above model and language,a workflow scheduling approach was put forward.It was proved that the approach did not violate the privacy policies for data protection.

Key words: cloud workflow, data privacy protection, workflow scheduling, Chinese wall model