Patent ID: 8948384
Filing Date: 2015-02-03
Classification: H04N

Abstract:
1. An image encryption and decryption system for transmitting digital videos, each digital video consisting of a plurality of image frames, through a communication network, said image encryption and decryption system comprising: an image transmitter for sorting said image frames into segments with each segment being initiated by the occurrence of a change of scene (shot) in the image frames, and for encrypting the sorted image frames by mixing temporal sequences of the image frames within each segment based on timestamp information contained within each image frame, encoding the sorted encrypted image frames, and transmitting the encoded sorted encrypted image frames; an image receiver for receiving the encoded sorted image frames from the image transmitter, decoding the received encoded image frames, sorting the decoded image frames into the segments, decrypting the sorted segments by restoring the temporal sequences of the image frames within each segment, and outputting the decrypted image frames, with the image receiver or image transmitter including a CPU; a pseudo random generator device that generates a random number; wherein the image transmitter encrypts the sorted image frames by using the generated random number for mixing the temporal sequences of the image frames within each segment, the generated random number being generated based on a seed inputted to the pseudo random generator; and wherein the image transmitter and the image receiver share the seed inputted to the pseudo random generator.