一种适合智能手机的JPEG压缩加密方案

智能手机日益贴近人们的生活，给人们生活带来了极大的便利，但开发者们“重体验、轻安全”的观念，使得智能手机所引发的安全问题也越来越突出。在研究图像加密方案的同时，针对智能手机平台的图像安全问题，设计了一种结合JPEG压缩编码的图像加密算法。该算法在保证图像压缩效率的前提下，实现了对图像的加密。通过实验分析发现，JPEG压缩算法在嵌入本加密方案后，压缩比损失和时间增加量均控制在20%以内，因而适合移植到智能手机平台中。

A joint compression and encryption scheme for JPEG image adapt to smart Phones

Smart phone is becoming closer to people's life, bringing great convenience. However, developers’concept of“focus on experience but ignore security”makes the security issue caused by smart phone more prominent. The program of image encryption is studied and an image encryption algorithm in combination with JPEG compression is designed in order to solve the image security problem in smart phone platforms. This algorithm can realize the image encryption while keeping image compression efficient. Experimental analysis shows that, after the JPEG compression is added to the program of image encryption, the loss of compression ratio and the increase of the time are controlled within 20%.Thus, the proposed scheme is suitable for transplantation into smart phone platforms.