摘要
针对移动互联网智能终端的图像加密需求,本文提出了移动终端图像加密方法的选择原则,并按此原则选择了基于混沌序列的logistic图像加密算法。针对基于混沌序列的logistic图像加密算法对较大图像进行加密需要较大的时间和空间性能,不能满足移动终端的性能需求,本文提出了基于混沌的logistic映射图像加密算法的改进。经移动终端实验表明,改进后的加密算法在不失安全性的前提下大大提高了时间与空间的性能,更加适合移动终端的需求。
On the demand of the image encryption of intelligent terminals of mobile internet, this paper puts forward a selection principle for the image encryption method of mobile terminals. According to the principle, a logistic image encryption algorithm based on chaotic sequence is choosen. The logistic image encryption algorithm based on chaotic sequence for a larger image requires larger space and time performance, which can hardly satisfy the performance requirements of mobile terminals. The paper puts forward the improvement of encryption algorithm based on chaotic logistic map image. After mobile terminal experiment, it is proved that the improved encryption algorithm greatly improves the time and space performance on the premise of safety, which is more suitable for the needs of mobile terminals.
基金
2014年上海市软件和集成电路产业发展专项资金项目(编号:140301)
基于公共信用信息服务平台的统计分析应用
