首页> 外国专利> combinatorial key dependent network for digital input data encryption / decryption, block to be used for secret key controlled cryptographic functions, method for digital input data encryption / decryption, data processing device, and multimedia device for store and reproduce digital data

combinatorial key dependent network for digital input data encryption / decryption, block to be used for secret key controlled cryptographic functions, method for digital input data encryption / decryption, data processing device, and multimedia device for store and reproduce digital data

机译：用于数字输入数据加密/解密的依赖于组合密钥的网络，用于密钥控制的加密功能的块，用于数字输入数据加密/解密的方法，数据处理设备以及用于存储和再现数字数据的多媒体设备

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摘要

"COMBINATION KEY DEPENDENT NETWORK FOR ENCRYPTION / DIGITAL DATA ENCRYPTION, BLOCK TO BE USED FOR SECRET KEY CRYPTOGRAPHIC CONTROL FUNCTIONS, ENDIFIED DIFFERENTIAL, ENCRYPTION / DECIFRACTION METHOD TO STORE AND PLAY DIGITAL DATA ". A combinatorial key-dependent network (46), suitable for data encryption / decryption on data processing device buses and memories, includes multiple layers, where each layer is composed of several elementary building blocks (2) operating on block sizes too small. A generic building block (2) acts on a small number of input data bits, which are divided into two groups of m and n bits, respectively. The input m bits, which are output intact, are used to select k out of 2¬ m¬k key bits by a multiplexer circuit; The k bits are then used to select a reversible (nxn) bit transformation (R ~ k ~) acting on the remaining n input bits to produce the corresponding n output bits. The total number of key bits in the building block is thus 2¬ m¬k, which can easily be made larger than m + n. An inverse building block is the same except that the reversible transformations R ~ k ~ are replaced by their inverse R ~ k ~ ¬ -1¬.

机译：“用于加密/数字数据加密的组合密钥依赖网络，用于秘密密钥加密控制功能的块，特有的差分，加密/解密方法，用于存储和播放数字数据”。适用于在数据处理设备总线和存储器上进行数据加密/解密的组合密钥相关网络（46）包括多层，其中每一层都由几个基本的构建块（2）组成，这些基本构建块（2）的块大小过小。通用构造块（2）作用于少量输入数据位，这些输入数据位分别分为m位和n位两组。完整输出的输入m位用于通过多路复用器电路从2‑m‑k个密钥位中选择k个;然后，使用k个位选择作用在其余n个输入位上的可逆（nxn）位变换（R〜k〜），以产生相应的n个输出位。因此，构建块中的密钥位数总数为2‑m‑k，可以很容易地使其大于m + n。逆构建块是相同的，除了可逆变换R〜k〜被其逆R〜k〜-1 -1代替。

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公开/公告号BR0318492A

专利类型
公开/公告日2006-09-12

原文格式PDF
申请/专利权人 TELECOM ITALIA S.P.A.;
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申请/专利号BR20030318492
发明设计人 JOVAN GOLIC;
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申请日2003-09-05
分类号H04L9/06;
国家 BR
入库时间 2022-08-21 21:40:23

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