An Improvement to a Decentralized Management Method for Uniquely Accessible Attribute Information

In this paper, we improve a decentralized management method for uniquely accessible attribute information. The previous method has the problem of the inconsistency in access policy. In our new method,the user has always to redirect from the identity provider to the attribute provider, because the user cannot make requests directly to the attribute provider. Our method makes it possible for the identity provider alone to manage the access policy. As a result,the problem of inconsistency in access policy is solved. Moreover, illegal requests are prevented from using this redirection.