- 专利标题： Encryption/decryption unit and storage medium
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申请号： US09388388申请日： 1999-09-01
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公开(公告)号： US06985582B1公开(公告)日： 2006-01-10
- 发明人: Fumihiko Sano , Shinichi Kawamura , Hideo Shimizu
- 申请人： Fumihiko Sano , Shinichi Kawamura , Hideo Shimizu
- 申请人地址： JP Kawasaki
- 专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人： Kabushiki Kaisha Toshiba
- 当前专利权人地址： JP Kawasaki
- 代理机构： Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P
- 优先权： JP10-337108 19981127
- 主分类号： H04L9/06
- IPC分类号： H04L9/06
摘要：
An encryption/decryption unit includes a first data encryption/decryption section for performing an encryption or decryption process, a first data substitution section for performing data substitution of an output from the first encryption/decryption section according to a predetermined permutation table, a second data encryption/decryption section for performing an encryption or decryption process for an output from the first data substitution section, a second data substitution section for performing data substitution of an output from the second data encryption/decryption section according to a predetermined permutation table, and a third data encryption/decryption section for performing an encryption or decryption process for an output from the second data substitution section.
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