Abstract: P3P (platform for privacy preferences) is mainly used to protect user’s privacy when user visits website. Meanwhile, how to use semantic Web technology to implement P3P framework becomes a major concern. This paper describes how to do the knowledge representation for P3P privacy policy and the user’s privacy preference with OWL (Web ontoloty language), and provides several OWL restrictions which are described by OWL axiom to support the reasoning. This paper also describes how to use the reasoning to detect the conflicts between privacy policy and user’s preference. At last, it proves the correctness of the approach through an experiment.

Key words: ontology, privacy conflict, platform for privacy preferences (P3P)

摘要： 隐私偏好平台（platform for privacy preferences，P3P）主要被用于在用户访问网站时保护用户的隐私。同时，如何使用语义Web技术实现P3P隐私框架已经成为一个主要的关注点。分析了如何使用本体描述语言（Web ontoloty language，OWL）对P3P隐私策略及用户隐私偏好进行知识表示,并提供了若干使用OWL公理描述的约束，这些约束将为推理提供支持。分析了如何使用推理对服务隐私策略同用户隐私偏好之间的冲突进行检测。通过实验证明了该方法的正确性。

关键词: 本体, 隐私冲突, 隐私偏好平台（P3P）