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Patent Searching and Data


Title:
情報共有システム、装置、方法及びプログラム
Document Type and Number:
Japanese Patent JP5498285
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an information sharing technique capable of securing the safety even if a master secret key z, and a short-term secrete key yof an information sharing device Uare leaked.SOLUTION: A shared value calculation unit 22 of an information sharing device Uperforms a process for calculating shared value σ=e(Z, QY) for each of i=1,..., n, and performs a process for calculating a shared value σ'=Yfor each of j=1,..., n'. A shared value calculation unit 32 of an information sharing device Uperforms a process for calculating a shared value σ=e(PY,DZ) for each of i=1,..., n, and performs a process for calculating a shared value σ'=e(P, Y)for each of j=1,..., n'.

Inventors:
Kotaro Suzuki
Belcanto Ustago
Application Number:
JP2010154802A
Publication Date:
May 21, 2014
Filing Date:
July 07, 2010
Export Citation:
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Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04L9/08
Domestic Patent References:
JP2011147060A
Other References:
森山 大輔 他,Full security を満たすspatial encryption の提案,2010年 暗号と情報セキュリティシンポジウム概要集 CD-ROM,2010年 暗号と情報セキュリティシンポジウム実行委員会,2010年 1月19日,2C3-4
藤岡 淳 他,eCKモデルで安全なID ベース認証鍵交換方式,2010年 暗号と情報セキュリティシンポジウム概要集 CD-ROM,2010年 暗号と情報セキュリティシンポジウム実行委員,2010年 1月19日,3C1-1
Attorney, Agent or Firm:
Naoki Nakao
Yukio Nakamura
Yoshimura Munehiro
Taku Kusano