Images are gaining popularity in communication, entertainment and business etc. Some images can have confidential information so the security of these confidential images is a crucial issue. There is the image encryption technique that uses a one-dimensional random scrambling and provides security to secret images. The drawback of this technique is that it does not produce different histogram from the histogram of original image even after encryption procedure and this unchanged histogram reveals useful information about the original image. In this paper, an image encryption method is proposed that eliminates this drawback and provides better security than algorithm that uses one dimensional random scrambling.
General TermsCryptography, image security, image processing.
Images have a significant role in communication, entertainment and business etc. Images may convey confidential information, so various image encryption algorithms ensure security of secret images. The correlation coefficient in encrypted image is an important security criterion to measure the level of security of encrypted image. Various factors can affect the correlation coefficient in the encoded image. So, this work reveals the effect of image encryption method and the size of an image on correlation coefficient in the corresponding encrypted image.
General TermsData Security, image encryption, image processing.
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