DMCA
Secure Image encryption through key hashing and wavelet transform techniques
BibTeX
@MISC{B_secureimage,
author = {Tapas B and B N Chatterji},
title = {Secure Image encryption through key hashing and wavelet transform techniques},
year = {}
}
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Abstract
Abstract:- To provide security of the images in the multimedia environment encryption plays an important role. The traditional cryptographic algorithm such as AES, DES, TDES, RSA, IDEA, etc. are not so effective for image encryption because of their slow processing speed, inherent features of image data like bulk data capacity, high redundancy and ineffectiveness in removing the correlations of the adjacent pixels of the image[1],[2]. In order to cope with this problem a noble technique of digital image encryption is proposed. In this technique the symmetric key is used for image encryption. The hash value (SHA1) of the key file is generated and stored as text file [4],[5]. The SHA test is converted to binary string. The key hash value is now expanded to match with the image dimension. For creating confusion the image to be encrypted is wavelet transform is first calculated and then converted into binary string and the hash of the secret key value (SHA1) is finally bitxored to create the encrypted image. The experimental results, correlation analysis of adjacent pixels of encrypted image in the horizontally, vertically and diagonally spaced pixels, histogram analysis and Structural Similarity Index Measure (SSIM), tests have been carried out and results are found to be quite satisfactory in terms of security and performance.
Keyphrases
secure image encryption key hashing wavelet transform technique binary string image encryption encrypted image adjacent pixel important role symmetric key hash value spaced pixel image data inherent feature correlation analysis noble technique sha test slow processing speed structural similarity index measure secret key value digital image encryption multimedia environment encryption key file image dimension histogram analysis text file high redundancy traditional cryptographic algorithm bulk data capacity key hash value experimental result wavelet transform
