A 2-KEY-LOCK-PAIR ACCESS-CONTROL METHOD USING PRIME FACTORIZATION ANDTIME STAMP

Many methods, based on the concept of key-lock-pair have been proposed for access control in computer protection systems. However, the propo sed methods still either lack of dynamic ability or need quite a lot o f computation in performing requests of deleting users/files, insertin g users/files, or updating access rights of users to files. In this pa per we propose a two-key-lock-pair access control method that is based on the unique factorization theorem and a time stamp mechanism. Our m ethod is dynamic and needs a minimum amount of computation in the sens e that it only updates at most one key/lock for each access request, w hich has not been achieved before.