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Image Encryption using Substitution and Discrete Cosine Transform Technique

Author(s):

Shwetha R , ATME College of engineering; Prajwalasimha S N, ATME College of engineering; Umme Rumana, ATME College of engineering; Bindu K R, ATME College of engineering; Shashidhara S, ATME College of engineering

Keywords:

Data Security, Digital Encryption, Communication, Chaotic and Transmission

Abstract

Data security in this generation is a very challenging issue that touches many areas of communication and also computers. Digital encryption has found its way has a major field of interest for development of digital image production and communication. Encryption is the process of converting normal data or plaintext to something incomprehensible. The proposed method has two phases: The pixel value is changed by non-chaotic substitution. The pixel position is changed using DCT. These two methods help to encrypt the image so it is necessary to encrypt the image before its transmission or archiving. The existing methods uses long length secrete key for the encryption process which makes the algorithm complex and time consumption is more for the execution. In this proposed method the key length is reduced to 128bit. The proposed has been designed and implemented using MATLAB software.

Other Details

Paper ID: IJSRDV5I21041
Published in: Volume : 5, Issue : 2
Publication Date: 01/05/2017
Page(s): 1248-1250

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