To enable a plurality of information processing devices to safely share the information recording medium, without requiring complex processes.
In a storage part 13 for each of PC10-is, distributed information SSK (i, 1) on each of private keys SK (i) is stored, respectively, each of encrypted messages PE (PK (i), KA) and the distributed information SSK (i, 2), in which a common key KA of a common key encryption system is encrypted, respectively, using each of public keys PK (i), is stored in USB memory 20. Each of the PC10-is restores the private key SK (i), by using the distributed information SSK (i, 1), and the distributed information SSK (i, 2), decodes the encrypted messages PE (PK (i), KA) stored in the USB memory 20 by using it, and extracts the common key KA. Each of the PC10-is generates the encrypted messages SE (kA, M (i)) for plain text M (i) by using the extracted common key KA and stores in the USB memory 20, also by using the extracted common key KA, the encrypted message SE (kA, M (i)) read from the USB memory 20 is decoded.
COPYRIGHT: (C)2009,JPO&INPIT
Tetsutaro Kobayashi
Hoshino Literature
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小田哲,小林鉄太郎,関良明,“ストレージに対する暗号化の一考察”,2009年 暗号と情報セキュリティシンポジウム SCIS2009 [CD-ROM],日本,2009年 1月20日,p.1-5
関良明,小田哲,小林鉄太郎,“ストレージの暗号化による仮想プライベートデバイスの提案”,FIT2009 第8回情報科学技術フォーラム 講演論文集,日本,社団法人情報処理学会,2009年 8月20日,第4分冊,RM-012,p.87-94
Yukio Nakamura
Yoshimura Munehiro
Taku Kusano