发明名称 |
DATA TRANSFORMATION APPARATUS, DATA TRANSFORMATION METHOD, AND COMPUTER PROGRAM |
摘要 |
A non-linear transformation processing structure having a high implementation efficiency and a high security is realized. Data transformation is performed using a first non-linear transformation part performing non-linear transformation using a plurality of small S-boxes; a linear transformation part receiving all the outputs from the first non-linear transformation part and performing data transformation using a matrix for performing optimal diffusion mappings; and a second non-linear transformation part including a plurality of small non-linear transformation parts that perform non-linear transformation on individual data units into which output data from the linear transformation part is divided. With this structure, appropriate data diffusion can be achieved without excessively increasing a critical path, and a structure with a high implementation efficiency and a high security can be achieved.
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申请公布号 |
US2010002872(A1) |
申请公布日期 |
2010.01.07 |
申请号 |
US20070439302 |
申请日期 |
2007.08.29 |
申请人 |
SHIBUTANI KYOJI;SHIRAI TAIZO;AKISHITA TORU;MORIAI SHIHO |
发明人 |
SHIBUTANI KYOJI;SHIRAI TAIZO;AKISHITA TORU;MORIAI SHIHO |
分类号 |
H04L9/28;G06F17/14;G06F17/16 |
主分类号 |
H04L9/28 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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