Abstract: A notification apparatus transmits notification-related information (a notification message and a notification target(s)) to a notification-related information guarantee apparatus, and the notification-related information guarantee apparatus guarantees that the notification-related information has been received from nothing other than the notification apparatus. After the notification apparatus transmits the notification-related information guaranteed authentic to an intermediary notification apparatus, the intermediary notification apparatus also confirms whether the notification-related information has been guaranteed authentic by the notification-related information guarantee apparatus.

Abstract: There is a need for facilitating configuration of the right to reference varied work histories and searching for work histories. A work history management apparatus according to an embodiment of the invention includes: a work history classification section that classifies a work history in accordance with a content of the work history and assigns a classification identifier; a work history registration section that associates the classification identifier with the work history and stores the work history in a storage device; and a work history reference section that responds to a work history reference request from a user, references a reference condition associating a user capable of referencing the work history with the classification identifier, and searches for the work history stored in the storage device so as to be able to be referenced by the user and correspond to the classification identifier.