Using a Novel Method for Trust Evaluation to Enhance ABAC Capabilities

M. Arasteh, S. Alizadeh
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引用次数: 1

Abstract

Access control is a security mechanism that prevents unauthorized access to sensitive resources. Attribute-Based Access Control model (ABAC) makes decisions by the considerations of subjects’ attributes. Although it has many advantages, it is not dynamic. In dynamic environments, the system should be able to change the users’ permissions according to their manner of activities. So, this paper proposes using trust besides ABAC. The introduced method for the evaluation of trust employs both the Fuzzy Inference System (FIS) and Neural Networks (NN), which is called Fuzzy-Neural based trust (FNT). As trust is evaluated according to some predefined parameters, the proposed model uses FIS to assess each parameter. Next, the assessed parameters should be mixed to generate a single result. Since the definition of an exact function might be difficult and complicated, the proposed model employs the NN, which acts as a black box and generates an expected output after its learning process. For the evaluation of trust, the assessed parameters are fed to the NN to produce a final result. Whenever a subject’s trust is evaluated, then the proposed model makes the final AC decision by the consideration of both ABAC’s result and the amount of trust. Afterwards, we evaluate the proposed model and then highlight its advantages by comparing with some other famous AC models.
利用一种新的信任评估方法增强ABAC能力
访问控制是一种防止对敏感资源进行未经授权访问的安全机制。基于属性的访问控制模型(ABAC)通过考虑主体的属性来进行决策。虽然它有很多优点,但它不是动态的。在动态环境中,系统应该能够根据用户的活动方式更改用户的权限。因此,本文提出在ABAC基础上使用信任。本文提出的信任评估方法采用模糊推理系统(FIS)和神经网络(NN)相结合的方法,称为基于模糊神经网络的信任(FNT)。由于信任是根据一些预定义的参数来评估的,因此该模型使用FIS来评估每个参数。接下来,应混合评估的参数以生成单个结果。由于精确函数的定义可能是困难和复杂的,因此所提出的模型采用了神经网络,它作为一个黑盒,并在其学习过程后生成预期输出。对于信任的评估,将评估的参数馈送到神经网络以产生最终结果。当评估主体的信任时,该模型综合考虑ABAC结果和信任量,做出最终的AC决策。然后,我们对所提出的模型进行了评价,并与其他一些著名的交流模型进行了比较,突出了其优点。
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