ON ENCRYPTION AND AUTHENTICATION OF THE DC DCT COEFFICIENT
english

2007 Proceedings of the Second International Conference on Signal Processing and Multimedia Applications   unpublished
When encryption and authentication techniques are applied to image or video data, sometimes it is advantageous to limit the operation to the DC DCT coefficient of each 8 × 8 block in a picture. In this work, the performance of such an approach is evaluated. This problem is considered as an image quality problem, and the metric structural similarity is used to show that by authenticating the DC coefficient, about 60% of the information can be guaranteed; by encrypting the DC coefficient, about
more » ... oefficient, about 80% of the information can be hindered.
doi:10.5220/0002137503650369 fatcat:3vzylnxzxjaa5f7cqbbcg7wll4