International Journal of Computer Applications |
Foundation of Computer Science (FCS), NY, USA |
Volume 97 - Number 10 |
Year of Publication: 2014 |
Authors: Nilesh Y. Choudhary, Ravindra K. Gupta |
10.5120/17045-7356 |
Nilesh Y. Choudhary, Ravindra K. Gupta . Partial Image Encryption based on Block wise Shuffling using Arnold Map. International Journal of Computer Applications. 97, 10 ( July 2014), 33-37. DOI=10.5120/17045-7356
To prevent image from unauthorized access, Encryption techniques of digital images play a very important role . The Fully image encryption techniques is very complex in nature and takes a lot of computational time. But, certain applications do not require total encryption; it requires a part of the multimedia data to be transparent to all users, like Pay-TV or Payable Internet Imaging Albums which involves encrypting the most meaningful parts of an image. In this paper we focus on a partial image encryption technique based on block wise shuffling with the help of Arnold map . Firstly image is divided into blocks then Blocks within the image are permuted by using Arnold map and final permuted block are combined that yields partial encrypted images . This process is repeated for different block size. The PSNR and NPCR obtained by our technique shows that the proposed technique gives better result than the existing techniques.