Open AccessON ENCRYPTION AND AUTHENTICATION OF THE DC DCT COEFFICIENT
Author(s) -
Li Weng,
Bart Preneel
Publication year - 2007
Language(s) - English
Resource type - Conference proceedings
DOI - 10.5220/0002137503650369
Subject(s) - encryption , discrete cosine transform , computer science , authentication (law) , computer security , artificial intelligence , image (mathematics)
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 80% of the information can be
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