Title :
Hierarchical scrambling scheme for palette-based images
Author :
Aryal, Anu ; Imaizumi, Shoko ; Aoki, Naokazu
Author_Institution :
Dept. of Image & Mater. Sci., Chiba Univ., Chiba, Japan
Abstract :
We present an efficient hierarchical scrambling scheme for palette-based images. The goal of hierarchical scrambling of a bit stream is to make the entire stream somehow difficult to decrypt. We decompose the original palette-based image into its corresponding binary bits then introduce cyclic shifts to scramble the selected entries and change their colors. The significant parameters (i.e. target pixels and target color components) play an important role in evaluating performance analysis. The scrambling scheme for the target pixels and the target color components were measured through a series of tests to measure the effectiveness of the proposed scheme. We also introduce an efficient key assignment scheme in which a recursive hash chain (RHC) is used to make our scheme secure.
Keywords :
cryptography; image coding; image colour analysis; telecommunication security; RHC; bit streaming; cyclic shifts; hierarchical scrambling scheme; key assignment scheme; palette-based image; recursive hash chain; target color components; target pixel; Encryption; Image color analysis; Image quality; Indexes; Internet;
Conference_Titel :
Intelligent Signal Processing and Communication Systems (ISPACS), 2014 International Symposium on
Conference_Location :
Kuching
DOI :
10.1109/ISPACS.2014.7024426