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- Title
CHAOS BASED CRYPTOGRAPHY AND RECTANGULAR SHAPE BASED STEGANOGRAPHY TECHNIQUE USING LSB.
- Authors
S, Aiswarya; R, Gomathi
- Abstract
Multimedia means text, image, audio or video file and transferring multimedia files through the internet are noticeable one. Multimedia securing techniques are additionally used to protect the file. Securing multimedia image file is difficult by using formal encryption techniques such as AES, RSA because of high correlation between pixels. For encryption, chaotic map with XOR function is used and to provide double protection, steganography technique is used. After the encryption, encrypted image is hidden into the cover image file using LSB-steganography. For that, from the cover image, the rectangular positioned pixel values are selected and the encrypted image values are hidden into the selected rectangular positioned pixel locations of the cover file. Embedded image i.e., stego image is transmitted to the recipient through the internet and the reversal process is carried over at the retriever side. The performance of this proposed algorithm is evaluated by using many numerical calculations such as NPCR, UACI and PSNR. Correlation analysis is also performed and the values of the secret image is compared with the chaotic map encrypted image. The obtained average NPCR, UACI and PSNR values are 99.8004%, 37.6773% and 46.41 respectively. These values are compared with existing methods. After retrieving the secret image, the PSNR value is calculated and is high as 46.41dB. From the analysis, it is clear that the chaotic map based image cryptography and steganography method provides more security and robustness in the wireless secret image transmission
- Subjects
CRYPTOGRAPHY; IMAGE transmission; NUMERICAL calculations; STATISTICAL correlation
- Publication
Malaysian Journal of Computer Science, 2023, Vol 36, Issue 4, p1
- ISSN
0127-9084
- Publication type
Article