電子申請システム及び書類保存装置並びにコンピュータ読み取り可能な記録媒体

Japanese Patent JP4124936

B2

PROBLEM TO BE SOLVED: To provide an electronic application system which secure the safety of a stored application document for a long period. SOLUTION: The electronic application system is provided which permits application for an electronic document from a terminal through a network, and this electronic application system has a document storage device, a means for calculating an alteration detection code from information including a document sent from the terminal, and a means for storing the information in the document storage device together with the alteration detection code. The alteration detection code is a code calculated by using a secret key held in the document storage device. Further, the system has an update means for updating the secret key and an open key when the validity of the secret key expires, a means for calculating the alteration detection code held in the document storage device by using the updated secret key, and a means for using the alteration detection code as a new alteration detection code.

Yoichi Kanai
Masuyoshi Taniuchida

JP2000011957A

July 23, 2008

January 20, 2000

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株式会社リコー

G09C1/00; G06F17/21; G06F21/64; G06Q10/00; G06Q50/00; G06Q50/26; H04L9/32

JP11338780A
JP11261550A
JP11143361A
JP10268764A
JP10327147A

統合運用管理システム HOPSS3/AS (VOS3/ES1,VOS3/AS,VOS3/FS),株式会社日立製作所,1997年12月 1日,第6版,p.197-200
中渡瀬 秀一 他,暗号・電子署名を用いたファイル共有システムについて,情報処理学会研究報告,日本,社団法人情報処理学会,1998年11月27日,第98巻,第108号,p.13-18

Tadahiko Ito

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