发明授权
- 专利标题： Method and apparatus for evaluating the strength of an encryption
- 专利标题（中）： 用于评估加密强度的方法和装置
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申请号： US09463907申请日： 1999-06-01
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公开(公告)号： US07187769B1公开(公告)日： 2007-03-06
- 发明人: Shiho Moriai , Kazumaro Aoki , Masayuki Kanda , Youichi Takashima , Kazuo Ohta
- 申请人： Shiho Moriai , Kazumaro Aoki , Masayuki Kanda , Youichi Takashima , Kazuo Ohta
- 申请人地址： JP
- 专利权人： Nippon Telegraph and Telephone Public Corporation
- 当前专利权人： Nippon Telegraph and Telephone Public Corporation
- 当前专利权人地址： JP
- 代理机构： Connolly Bove Lodge & Hutz, LLP
- 代理商 Larry J. Hume
- 优先权： JP10-153066 19980602
- 国际申请： PCT/JP99/02924 WO 19990601
- 国际公布： WO99/63706 WO 19991209
- 主分类号： H04K3/00
- IPC分类号： H04K3/00
摘要：
In the evaluation of the randomness of an S-box, measures of resistance to higher order cryptanalysis, interpolation cryptanalysis, partitioning cryptanalysis and differential-linear cryptanalysis and necessary conditions for those measures to have resistance to each cryptanalysis are set, then for functions as candidates for the S-box, it is evaluated whether one or all of the conditions are satisfied, and those of the candidate functions for which one or all of the conditions are satisfied are selected as required. It is also possible to further evaluate the resistance of such selected functions to at least one of differential cryptanalysis and linear cryptanalysis and select those of the candidate functions which are resistant to at least one of the cryptanalyses as required.
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