Title:
ファイルアクセス制御方法、プログラム及び記憶媒体
Document Type and Number:
Japanese Patent JP3978046
Kind Code:
B2
Abstract:
To independently control read right and write right to a file with a simple constitution.
Client devices 201, 202do not hold common key cipher-type common key data Fcrypt, and manage only a public key cipher-type public key data Fpubor a pair of keys Fpub, Fpri), to a file server device storing the encrypted file, a digital signature and the authentication data for writing Fwrite. In read processing, the client device derives the common key data Fcryptfrom the public key data Fpubby unidirectional function f, decrypts the encrypted file on the basis of the common key data Fcrypt, and verifies the digital signature on the basis of the public key data Fpub. In write processing, the client device derives the authentication data for write Fwritefrom the secret key data Fpriby unidirectional function f, transmits the authentication data for write Fwriteto the server device to receive the authentication of write right, and stores the encrypted file and the digital signature.
COPYRIGHT: (C)2003,JPO
Inventors:
Tomonari Fujita
Ogawara Satoru
Application Number:
JP2002048363A
Publication Date:
September 19, 2007
Filing Date:
February 25, 2002
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
G06F12/14; G06F12/00; G06F21/60; G06F21/62; G06F21/64; H04L9/08; H04L9/32
Domestic Patent References:
| JP6175905A | | | | |
| JP9233067A | | | | |
| JP9251426A | | | | |
| JP10260903A | | | | |
| JP11149413A | | | | |
| JP2001101082A | | | | |
| JP2003509881A | | | | |
| JP2003218851A | | | | |
Foreign References:
| WO2000057278A1 | | | | |
| WO2000057290A1 | | | | |
Other References:
藤田 智成,小河原 成哲,“データの機密性と完全性を保護するネットワークファイルシステムの設計と実装”,情報処理学会研究報告 システムソフトウェアとオペレーティング・システム,社団法人情報処理学会,2002年 6月28日,Vol.2002, No.60,pp.73-80,CS-NG-2003-01484-009
藤田 智成,小河原 成哲,“データの機密性と完全性を保護するネットワークファイルシステムの設計と実装”,電子情報通信学会技術研究報告 コンピュータシステム,社団法人電子情報通信学会,2002年 6月20日,Vol.102, No.153,pp.73-80,CS-NG-2004-00067-009
Attorney, Agent or Firm:
Takehiko Suzue
Sadao Muramatsu
Yoshio Ishikawa
