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1. 发明申请

US20120191986A1 CRYPTOGRAPHIC PROCESSING APPARATUS AND CRYPTOGRAPHIC PROCESSING METHOD, AND COMPUTER PROGRAM 有权
标题翻译：图形处理设备和图形处理方法以及计算机程序
公开(公告)号：US20120191986A1
公开(公告)日：2012-07-26
申请号：US13436223
申请日：2012-03-30
申请人： Kyoji SHIBUTANI , Taizo Shirai , Toru Akishita , Shiho Moriai
发明人： Kyoji SHIBUTANI , Taizo Shirai , Toru Akishita , Shiho Moriai
IPC分类号： G06F21/22
CPC分类号： H04L9/002 , H04L9/0625 , H04L2209/122 , H04L2209/24
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.
摘要翻译：在扩展的Feistel型通用密钥块密码处理中，实现了通常使用加密功能和解密功能的配置。在将数据线数d设定为满足d≥3的整数的扩展Feistel结构的密码处理配置中，应用了加密处理和解密处理中的共同功能的卷积特性，可以实现。通过在解密处理中将轮密钥置换或F功能配置的配置，可以通过将用于加密处理和解密处理的交换功能设置为具有相同的处理风格来执行使用公共功能的处理。

2. 发明申请

US20140233729A1 CRYPTOGRAPHIC PROCESSING APPARATUS AND CRYPTOGRAPHIC PROCESSING METHOD, AND COMPUTER PROGRAM 审中-公开
标题翻译：图形处理设备和图形处理方法以及计算机程序
公开(公告)号：US20140233729A1
公开(公告)日：2014-08-21
申请号：US14143739
申请日：2013-12-30
申请人： Taizo SHIRAI , Kyoji SHIBUTANI
发明人： Taizo SHIRAI , Kyoji SHIBUTANI
IPC分类号： H04L9/06
CPC分类号： H04L9/06 , H04L9/002 , H04L9/0625 , H04L2209/122
摘要： There is provided a highly secure cryptographic processing apparatus and method where an analysis difficulty is increased. In a Feistel type common key block encrypting process in which an SPN type F function having a nonlinear conversion section and a linear conversion section is repeatedly executed a plurality of rounds. The linear conversion process of an F function corresponding to each of the plurality of rounds is performed as a linear conversion process which employs an MDS (Maximum Distance Separable) matrix, and a linear conversion process is carried out which employs a different MDS matrix at least at each of consecutive odd number rounds and consecutive even number rounds. This structure makes it possible to increase the minimum number (a robustness index against a differential attack in common key block encryption) of the active S box in the entire encrypting function.
摘要翻译：提供了一种高度安全的加密处理装置和方法，其中分析难度增加。在其中具有非线性转换部分和线性转换部分的SPN型F函数被重复执行多次的Feistel型公共密钥块加密处理中。执行与多个轮次中的每一个对应的F函数的线性转换处理作为采用MDS（最大距离可分离）矩阵的线性转换处理，并且执行线性转换处理，其至少采用不同的MDS矩阵在连续的奇数轮和连续偶数轮中的每一个。该结构使得可以增加整个加密功能中的活动S盒的最小数量（针对公共密钥块加密中的差分攻击的鲁棒性指数）。

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