Abstract: Ontologies，which can provide a shared and common understanding of some domain that can be communicated across people and computers，place the key function in the semantic Web.However，due to lack of essential access control mechanisms，the dissemination of ontologies can result in revealing sensitive information in the ontology documents.This paper proposes a Semantic-associated Role-Based Access Control（S-RBAC） model for the OWL ontology.By extending the traditional RBAC model based on the semantic association of the ontology elements，S-RBAC model not only can provide essential control mechanisms for the direct access to ontologies and their elements，but also can account for the inference disclosure problems induced by the semantic association of the ontology elements.

Key words: ontology, access control, role-based, semantic association, inference disclosure

摘要： 本体是对共享概念明确的形式化规范说明，是语义Web实现的关键技术。当前语义Web缺乏对本体有效的访问控制手段，因此本体的发布必然会导致相关领域敏感信息的泄露。提出了一个基于角色的OWL本体访问控制模型，该模型充分利用了本体元素之间的语义关联性，对传统的RBAC模型进行了扩展，能够对OWL本体以及本体元素的访问实施有效地控制，同时也解决了OWL本体访问控制中推理泄露的问题。

关键词: 本体, 访问控制, 基于角色, 语义关联, 推理泄露