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Secure Transmission of an Image using Partial Encryption based Algorithm
| International Journal of Computer Applications |
| Foundation of Computer Science (FCS), NY, USA |
| Volume 63 - Number 16 |
| Year of Publication: 2013 |
| Authors: Parameshachari B D, K M Sunjiv Soyjaudah, Sumitra Devi K A |
10.5120/10553-5746
|
Parameshachari B D, K M Sunjiv Soyjaudah, Sumitra Devi K A . Secure Transmission of an Image using Partial Encryption based Algorithm. International Journal of Computer Applications. 63, 16 ( February 2013), 33-36. DOI=10.5120/10553-5746
Abstract
Encryption is used to securely transmit data in open networks. Each type of data has its own features; therefore different techniques should be used to protect confidential image data from unauthorized access. In this paper we propose a novel concept of combined partial image encryption using phase manipulation and sign encryption. Entire encryption process involves two stages where image to be encrypted are applied to phase manipulation block. In first stage Fourier Transform (FT) is applied to get phase and magnitude of the input image. Phase of the image are scrambled to get modified image after applying Inverse Fourier Transform. In second stage the modified image is partially encrypted by using sign encryption. Sign Encryption finally gives resultant partially encrypted image by extracting the sign bits of modified image. Experiment is conducted for an image using MATLAB software. From the experiment we obtained partially encrypted image at the end of encryption process. Decryption process employs exactly reverse process of encryption which results in the reconstructed images.
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