A storage system, including a storing unit, which is configured to be connectable to an information processor, includes a communication data receiving unit, a path information extracting unit, a specifying information creating unit and an access controlling unit. The communication data receiving unit receives communication data transmitted from the information processor. The path information extracting unit extracts path information indicating a communication path between the information processor and the communication data receiving unit, from the communication data received by the communication data receiving unit. The specifying information creating unit creates specifying information indicating the information processor that is the transmission source of the communication data, based on the path information extracted by the path information extracting unit. The access controlling unit performs an access control on the storing unit corresponding to the communication data, based on the specifying information created by the specifying information creating unit.