| 摘要 |
The invention has an object to guarantee, when rewritable paper is used, authenticity of information shown on the rewritable paper. Provided is an information management method for managing information concerning a medium executed in an information management system including: the medium capable of representing on a surface thereof object information that is contents concerning an object; a management apparatus for managing a history of operation on the medium; and a printing apparatus for representing the object information on the medium and erasing the represented object information from the medium, the information management method comprising: holding, by the management apparatus, a correspondence among an identifier of the medium, the object information represented on the medium, and a valid period of the object; and recording, by the management apparatus, a start of the valid period of the object when the printing apparatus represents the object information on the medium. |
