Management Device and Program

Abstract

The present invention provides a management device and a program with which it is possible to easily discriminate between the alteration and correction of an electronic document. A management device 1 for managing a user's electronic documents, the management device 1 comprising: a document acquisition unit 11 for acquiring an electronic document; an indication acquisition unit 12 for acquiring an indication to create a signature for the acquired electronic document; a generation unit 14 for generating unique text information on the basis of the acquired indication to create; a write unit 15 for writing signature information that includes the generated text information and time information that includes a signing time-of-day into the electronic document; a calculation unit 18 for calculating the hash value of the electronic document; a holding unit 16 for holding with respect to the signature information, time information and hash value in a management file that manages the electronic document; and an output unit 19 for outputting the electronic document that includes the written-in signature information and time information.

Dependencies are inferred from the claim text.