For safety authorization to proper amount of resources in aircraft equipment support systems and flexibly changing of authorization according to operation history, trust and forecast based access control (TFAC) is proposed, which extends rolebased access control (RBAC) with the notion of trust and forecast.Roles do not be activated until the trust values of users meet the requirements. Amounts do not be assigned to permissions until amounts are in forecast intervals. Then, the trust and forecast mechanism is designed. The usage of TFAC is illustrated through a typical example. Result shows that TFAC can provide flexible and efficient access control in equipment support systems.%为保证航空装备保障系统中适量的保障资源的安全授权,同时授权能够根据用户历史行为进行变更,在基于角色的访问控制模型基础上引入了信任和预测,提出了基于信任和预测的访问控制模型.角色只有在信任度要求满足时才能被激活,只有数量在属于预测区间时才能被分配给权限.设计了信任和预测机制,并结合具体实例对模型的使用进行了分析.结果表明,基于信任和预测的访问控制模型能够对航空装备保障系统中的资源实现灵活和有效的访问控制.
展开▼
