Protecting Digital Color Image Applying Double Phase Encryption

Digital image is one of the most important types of data used due to the large number of computerized applications that are needed for mankind. Some computerized applications that use digital images need a high level of security to protect the image, and to turn it into a vague and incomprehensible image to any third party, and that is why we have to seek a secure method of cryptography to protect the digital color images. In this paper we will introduce method based wavelet packet tree decomposition and reconstruction to generate an encrypted image, the encrypted image then will be XORed to get the final encrypted image. The method will use a complicated key which contains two parts the ordering sequences and the XORing key to form a total PK. The method will be implemented to measure the quality values such as MSE, PSNR and encryption-decryption time.