视频数据库多级访问控制

针对视频数据库中涉及敏感信息的视频数据分级保护问题,提出视频数据库多级访问控制模型。在该模型中,设计用户身份辨别及身份强度算法,其结果作为用户安全等级隶属函数的输入,该函数值为用户安全等级隶属度,并与视频数据安全等级隶属度一起作为授权规则中安全等级隶属度比较函数的输入,其函数值结合时间元素能够灵活地实现多级访问控制。与已有的访问控制模型相比,该模型最突出的特点是实现动态授权和视频数据分级保护。

Multilevel access control for video database

In regards to the critical issues of classification protecting sensitive information of the data stored in video da-tabase,a multilevel access control model for the video database was proposed.A series of algorithms was designed and developed in the model where a method of distinguishing user identity and an algorithm to ensure good identity strength were presented.The result of them was then used as the input to user’s security level membership function.The user’s security level membership degree was subsequently acquired from the result of this function,and it is then,together with the security level membership degree of video data,used as input to the comparison function of security level member-ship degree in authorization rule.As a result,the multilevel access control can be implemented neatly through combining the result of the comparison function with time element.Compared with the existing access control models,the most out-standing characteristics of the proposed model are realizations of dynamic authorization and video data classification protection.