发明名称 |
ENCRYPTION DEVICE, ENCRYPTION METHOD, AND COMPUTER PROGRAM |
摘要 |
In extended Feistel type common key block cipher processing, a configuration is realized in which an encryption function and a decryption function are commonly used. In a cryptographic processing configuration to which an extended Feistel structure in which the number of data lines d is set to an integer satisfying d ‰¥ 3 is applied, involution properties, that is, the application of a common function to encryption processing and decryption processing, can be achieved. With a configuration in which round keys are permuted or F-functions are permuted in the decryption processing, processing using a common function can be performed by setting swap functions for the encryption processing and the decryption processing to have the same processing style. |
申请公布号 |
EP2058780(A4) |
申请公布日期 |
2011.03.09 |
申请号 |
EP20070806206 |
申请日期 |
2007.08.29 |
申请人 |
SONY CORPORATION |
发明人 |
SHIBUTANI, KYOJI;SHIRAI, TAIZO;AKISHITA, TORU;MORIAI, SHIHO |
分类号 |
H04L9/06;G09C1/00 |
主分类号 |
H04L9/06 |
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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