Abstract:

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.

Key words: image encryption;smart phones;information security;JPEG compression