| 摘要: |
| 商业应用需要实施完整性策略保护.Biba模型提供了一种简洁的多级完整性控制方案,但是需要引入可信主体来保证实施的可用性.而Clark-Wilson模型通过可监控的状态转换提供了一种完备的完整性保护,但其复杂性影响了该模型的完整实现.提出的模型以Biba严格完整性策略为基础,同时根据可信主体在其生命周期所属的状态实施Biba低水标策略.对可信主体在其生命周期发生的状态转换及相应的低水标参数调整,采用Clark-Wilson模型来进行监控.在有效解决了Biba策略的可用性问题和Clark-Wilson模型监控量过大给系统带来的配置和运行负担问题的同时,继承它们的优点.证明了该策略融合方案是可行的、安全的. |
| 关键词: 完整性策略 强制访问控制 Biba模型 Clark-Wilson模型 |
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| 基金项目:Supported by the National High-Tech Research and Development Plan of China under Grant No.2007AA010601 (国家高技术研究发展计划(863)); the Defense Pre-Research Project of the “Eleventh Five-Year-Plan” of China (国家“十一五”国防预研项目) |
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| Hybrid Mandatory Integrity Model Composed of Biba and Clark-Wilson Policy |
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ZHOU Zhou-Yi,HE Ye-Ping,LIANG Hong-Liang
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| Abstract: |
| Commercial application requires protection of integrity policy. Biba model provides a simple multi-level integrity access control scheme but it needs the introduction of trusted subject to ensure the usability. Clark-Wilson model provides a complete integrity protection by means of controlled state transaction, but its entire implementation is hindered by its complication. This paper proposes a model that enforces Biba strict integrity policy as basic access control mechanism, at the same time enforces Biba low-water-mark policy on trusted subjects according to the state in their lifecycle. Clark-Wilson model is used to control and audit subject’s state transition and run time adjustment of low-water-mark policy parameters. This paper solves the usability problem introduced by Biba policies and high configuration burden and runtime overload introduced by massive supervising task of Clark-Wilson, while at the same time borrows their merits. This policy composition scheme is proved to be applicable and secure. |
| Key words: integrity policy mandatory access control Biba model Clark-Wilson model |
