CAJ | 학술논문

针对移动互联网智能终端的图像加密需求，在对传统的图像像素位置置乱以及像素灰度值变换加密等方法的分析与实验基础上，提出移动终端图像加密方法的四项选择原则，并按此原则设计Arnold变换和混沌序列加密相结合的图像双重密钥双重置乱加密算法。同时，为了提高加解密运算速度，实现移动终端快速图像加解密工作，在基于对Arnold变换的周期性验证和理论推导，得出移动终端的图像加解密矩阵的快速查表法。应用证明，该算法能满足事务处理对移动终端图像加密的需求。
침대이동호련망지능종단적도상가밀수구，재대전통적도상상소위치치란이급상소회도치변환가밀등방법적분석여실험기출상，제출이동종단도상가밀방법적사항선택원칙，병안차원칙설계Arnold변환화혼돈서렬가밀상결합적도상쌍중밀약쌍중치란가밀산법。동시，위료제고가해밀운산속도，실현이동종단쾌속도상가해밀공작，재기우대Arnold변환적주기성험증화이론추도，득출이동종단적도상가해밀구진적쾌속사표법。응용증명，해산법능만족사무처리대이동종단도상가밀적수구。
According to the requirements of intelligent terminals of mobile Internet in image encryption,this article puts forward the four selection principles in regard to encryption approaches for images of mobile terminals based on analysing the traditional methods of image pixel positions scrambling and pixel greyscale value encryption by transformation,and based on these principles we design the encryption algorithm with dual image keys and dual scrambling which combines the Arnold conversion and the chaotic sequence encryption.Meanwhile,in order to improve computing speed of encryption and decryption,and to realise fast image encryption and decryption of mobile terminals,based on periodic verification and theoretical derivation of Arnold conversion,we derive a fast look-up table method for image encryption and decryption matrix of mobile terminals.It is proved by application that the algorithm can satisfy the requirement of transaction processing in image encryption of mobile terminals.