Abstract: A communication device according to an embodiment includes an interpreter, a storage, and a generator. The interpreter is configured to interpret a content of a message addressed to a target user. The storage stores information on a personal feature of the target user. The generator is configured to generate a response message simulating a response by the target user on the basis of the content of the message addressed to the target user, which is interpreted by the interpreter, and the information on the personal feature of the target user stored in the storage.

Abstract: A communication device according to an embodiment includes an interpreter, a storage, and a generator. The interpreter is configured to interpret a content of a message addressed to a target user. The storage stores information on a personal feature of the target user. The generator is configured to generate a response message simulating a response by the target user on the basis of the content of the message addressed to the target user, which is interpreted by the interpreter, and the information on the personal feature of the target user stored in the storage.

Abstract: According to one embodiment, a policy update system includes a server apparatus configured to be able to provide a plurality of services to a user, the server apparatus including storage device for storing a first user ID; a policy storage device configured to store a plurality of policies, each policy being composed of condition describing user attribute information in which a plurality of items including a second user ID corresponding to the first user ID are associated, and each policy specifying a use privilege of each service; a policy update apparatus configured to be able to update each stored policy; and a user attribute information storage device configured to store post-change user attribute information, and a change content for each second user ID.

Abstract: According to one embodiment, a policy management system includes a user terminal, an ID provider system which manages an identity of a user, and a service provider system which provides service data. The ID provider system stores a pair of an old policy and a new policy with respect to each service provider ID. The ID provider system stores information with respect to each service provider ID, the difference-adaptive definition information defining a first condition which is referred to when a date of transmission of an access request message is within a transition period from the old policy to new policy, and a second condition which is referred to when the date of transmission of the access request message is out of the transition period.