论文部分内容阅读
一、前言在数字通信中,图象加密问题是一个重要的问题。由于图象中所含的数据量大,要求的加密速率高,一般的密码体制都不适合。为了解决这个问题,提出了很多方法,或者采用高速产生的伪随机序列来复盖图象,或者利用图象本身的特点,采用密码控制的图象象素地址改变的方法来达到图象加密的目的。在“图象加密的一种方法”一文中,提出了一种图象加密的方法。下面,我们即对这种图象加密的方法的安全性进行讨论。
I. Preface In digital communications, image encryption is an important issue. Due to the large amount of data contained in the image, the required encryption rate is high, the general password system is not suitable. In order to solve this problem, a lot of methods have been proposed either to cover the image with a pseudo-random sequence generated at a high speed, or to use the password-controlled image pixel address change to achieve the image-encrypted purpose. In the article “A Method of Image Encryption”, a method of image encryption is proposed. Next, we discuss the security of this method of image encryption.