Modified algorithm for image watermarking using 2D-DCT and elgamal cryptosystem / Nur Azien Yazid, Kamilah Abdullah and Suhaila Abd Halim

Yazid, Nur Azien and Abdullah, Kamilah and Abd Halim, Suhaila (2019) Modified algorithm for image watermarking using 2D-DCT and elgamal cryptosystem / Nur Azien Yazid, Kamilah Abdullah and Suhaila Abd Halim. ESTEEM Academic Journal, 15. pp. 44-55. ISSN 2289-4934

Official URL: https://uppp.uitm.edu.my

Abstract

Image watermarking embeds identifying information in an image in such a manner that it cannot easily be removed. For the past several years, image digital watermarking has become a necessary element used for hid ing secret image and enabling secured communication such as privacy, confidentiality, authentication and data integrity. Although numerous watermarking schemes are present in grayscale images, the present work focuses on the RGB color image. This study proposed a new hybrid method that would satisfy the essential needs of modern image watermarking. The color image watermarking is based on the 2D Discrete Cosine Transform and Egamal cryptosystem.The 2D Discrete Cosine Transform depends on the matrix products, while the ElGamal cryptosystem depends on the discrete logarithm problem. The cryptosystem is combined with existing Arnold transform in watermarking algorithm to enhance the security of secret image. Value of Peak Signal to Noise Ratio was taken as performance evaluation parameters. On the whole, the performance evaluation shows that combining the two algorithms improved the performance of image watermarking.

Metadata

Item Type: Article
Creators:
Creators
Email / ID Num.
Yazid, Nur Azien
UNSPECIFIED
Abdullah, Kamilah
1 kamilah@fskm.uitm.edu.my
Abd Halim, Suhaila
UNSPECIFIED
Subjects: Q Science > QA Mathematics > Instruments and machines > Electronic Computers. Computer Science > Cryptography. Access control. Computer security
Q Science > QA Mathematics > Instruments and machines > Electronic Computers. Computer Science > Algorithms
Q Science > QA Mathematics > Instruments and machines > Electronic Computers. Computer Science > System design
Divisions: Universiti Teknologi MARA, Pulau Pinang > Permatang Pauh Campus
Journal or Publication Title: ESTEEM Academic Journal
UiTM Journal Collections: UiTM Journal > ESTEEM Academic Journal (EAJ)
ISSN: 2289-4934
Volume: 15
Page Range: pp. 44-55
Keywords: Image watermarking; 2D Discrete Cosine Transform; ElGamal cryptosystem; Arnold transform; Peak Signal to Noise Ratio.
Date: June 2019
URI: https://ir.uitm.edu.my/id/eprint/28904
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