基本信息:
- 专利标题： 文件加密和解密方法、文件加密和解密装置
- 专利标题（英）：File encryption/decryption method and device
- 申请号：CN200580047390.7 申请日：2005-12-20
- 公开(公告)号：CN101112035B 公开(公告)日：2010-12-08
- 发明人： 川井雅之 , 西川弘幸
- 申请人： 株式会社OAK情报系统 , 北陆日本电气软件株式会社
- 申请人地址： 日本东京
- 专利权人： 株式会社OAK情报系统,北陆日本电气软件株式会社
- 当前专利权人： 株式会社OAK情报系统,北陆日本电气软件株式会社
- 当前专利权人地址： 日本东京
- 代理机构： 中国国际贸易促进委员会专利商标事务所
- 代理人： 曲瑞
- 优先权： 021359/2005 2005.01.28 JP
- 国际申请： PCT/JP2005/023328 2005.12.20
- 国际公布： WO2006/080165 JA 2006.08.03
- 进入国家日期： 2007-07-27
- 主分类号： H04L9/08
- IPC分类号： H04L9/08 ; G09C1/00
To perform confidential information management and to rapidly detect information leak. [MEANS FOR SOLVING PROBLEMS] A file encryption/decryption program causes a computer to execute: a process including a step for generating a session key a1, a step for generating a file f2 by encrypting file f1 by the key a1, a step for generating a key a2 by encrypting the key a1 by a public key b1, a step for generating a key a3 by encrypting the key a1 by a public key c1, and a step for creating a concatenated file f3 containing the file f2, the key a2, and the key a3; and a process including a step for decomposing the file f3 into the file f2, the key a2, and the key a3, a decryption step for decrypting the file f2 into the file f1 by the key a1, a step for decrypting the key a1 and shifting the key a2 to the decryption step by a secret key b2 corresponding to the key b1, and a step for decrypting the key a3 to the key a1 by the secret key c2 corresponding to the key c1 and performing a shift to the decryption step.
公开/授权文献:
- CN101112035A 文件加密/解密方法、装置、程序以及存储了该程序的计算机可读记录介质 公开/授权日：2008-01-23