Context and Role Based Access Control in Grid
网格环境下基于上下文和角色的访问控制

Role based access control is the most popular access control module at present,and can reduces workload and complexity of authorization administration.But it uses static authorization like other traditional access control method,and doesn't take the contexts into account.When applied to the computer grid which is characterized by dynamic contexts it must have some limitation.Extended role based access control module by adding user active roles,system active privileges,user active privilege,user contexts and...