公开(公告)号：US20020054682A1

公开(公告)日：2002-05-09

申请号：US09925031

申请日：2001-08-08

Applicant: STMicroelectronics S.r.l.

Inventor： Giovanni Di Bernardo ,  Manuela La Rosa ,  Eusebio Di Cola ,  Luigi Occhipinti

IPC: H04L009/00

CPC classification number: H04L9/001 ,  H04L2209/60

Abstract: A method to protect the contents of an electronic document through an encryption system based on an initial confusing step in a scrambler and a subsequent diffusion step in a chaotic processor, both steps being of a chaotic type. Initially, encryption keys and an initial chaotic value are acquired; input character strings are acquired; and diffused character strings are calculated using the input character strings, the encryption keys, and previous diffused character strings. After a certain number of iterations, sets of diffused character strings are added to subsequent chaotic values generated by a chaotic processor to obtain encrypted words. Decryption is obtained through two successive operations, wherein the encrypted words are added to chaotic values identical to the encryption values and subtracted from previously decrypted words using an unscrambler element having a structure similar to that of the scrambler and using identical encryption keys.

Abstract translation: 一种通过基于加扰器中的初始混淆步骤的加密系统来保护电子文档的内容的方法，以及混沌处理器中的后续扩散步骤，这两个步骤都是混沌类型。 最初，获取加密密钥和初始混沌值; 获取输入字符串; 并且使用输入字符串，加密密钥和先前扩散的字符串来计算扩散字符串。 在一定次数的迭代之后，将混合字符串的集合添加到由混沌处理器生成的后续混沌值以获得加密的字。 通过两个连续操作获得解密，其中加密的字被添加到与加密值相同的混沌值，并使用具有类似于加扰器的结构的解扰器元件并使用相同的加密密钥从先前解密的字中减去。