2D-Noise Generation Aided by Chaotic Map, Reversible Integer Wavelet Transform and Cellular Automata

2018 ◽  
Author(s):  
A Seshadhri ◽  
Lakshmi Chandrasaker
Keyword(s):  
Wavelet Transform ◽  
Cellular Automata ◽  
Chaotic Map ◽  
Noise Generation ◽  
Integer Wavelet Transform ◽  
Integer Wavelet

scholarly journals Pengamanan Citra Dengan Kombinasi Modified Serpent IWT Dengan Modified Logistic Chaotic Map

2021 ◽  
Vol 8 (3) ◽  
pp. 1090-1104
Author(s):  
Kelvin Lysander ◽  
Allwin M Simarmata ◽  
Denniel Lusandy ◽  
Iswandi Iswandi
Keyword(s):  
Wavelet Transform ◽  
Chaotic Map ◽  
Cover Image ◽  
Integer Wavelet Transform ◽  
Logistic Chaotic Map ◽  
Integer Wavelet

Abstrak Algoritma kriptografi dapat digunakan untuk mengamankan citra. Salah satu algoritma kriptografi yang dapat digunakan untuk mengenkripsi citra adalah algoritma Serpent. Namun, algoritma Serpent memerlukan proses enkripsi dan dekripsi yang lama. Selain itu, pengenkripsian saja tidaklah cukup karena akan menimbulkan kecurigaan sehingga informasi akan rentan dicuri. Maka diperlukan teknik steganografi seperti metode Integer Wavelet Transform (IWT). Citra rahasia akan dienkripsi terlebih dahulu dengan menggunakan metode Modified Serpent, dimana modifikasi Serpernt mengubah proses transformasi substitusi byte (DES S-box) menjadi list bilangan prima 257 yang memiliki 128 generator untuk digunakan sebagai kunci di setiap putarannya. Pada proses penyisipan dengan metode IWT, perlu ditentukan posisi bit dan piksel pada cover image yang akan disisipkan sebuah pesan. Untuk menentukan posisi tersebut, maka digunakanlah fungsi chaos. Setelah itu, dapat dilakukan proses ekstraksi terhadap citra stego yang dihasilkan pada proses penyisipan untuk memperoleh kembali bit yang tersimpan didalamnya. Kumpulan bit tersebut dapat didekripsi sehingga akan diperoleh kembali citra rahasia semula.

scholarly journals Image Encryption based on Chaotic Map and Reversible Integer Wavelet Transform

2014 ◽  
Vol 65 (2) ◽  
pp. 90-96 ◽  
Author(s):  
Xiaopeng Wei ◽  
Bin Wang ◽  
Qiang Zhang ◽  
Chao Che
Keyword(s):  
Wavelet Transform ◽  
Image Encryption ◽  
Chaotic Maps ◽  
Chaotic Map ◽  
Experimental Results ◽  
Integer Wavelet Transform ◽  
Image Information ◽  
Initial Values ◽  
Plain Image ◽  
Integer Wavelet

Abstract In recent years, there has been growing interesting in image encryption based on chaotic maps and wavelet transform. In this paper, a novel scheme for image encryption based on chaotic maps and reversible integer wavelet transform is proposed. Firstly, the cipher key which is related to plain-image is used to generate different parameters and initial values of chaotic maps. Then the plain-image is permuted by the order from chaotic maps, and processed by integer wavelet transform. A part of transform coefficient is diffused by the orbits of chaotic maps. Finally, the cipher image is obtained by inverse integer wavelet transform based on the diffused coefficient. Numerical experimental results and comparing with previous works show that the proposed scheme possesses higher security than previous works, which is suitable for protecting the image information.

An integer wavelet transform image steganography method based on 3D sine chaotic map

2018 ◽  
Vol 78 (8) ◽  
pp. 9971-9989 ◽  
Author(s):  
Milad Yousefi Valandar ◽  
Milad Jafari Barani ◽  
Peyman Ayubi ◽  
Maryam Aghazadeh
Keyword(s):  
Wavelet Transform ◽  
Chaotic Map ◽  
Image Steganography ◽  
Integer Wavelet Transform ◽  
Integer Wavelet

scholarly journals Wavelet based Reversible Image Watermarking with Logistic Encryption for Health Informatics Systems

2019 ◽  
Vol 8 (2S11) ◽  
pp. 3567-3570
Keyword(s):  
Wavelet Transform ◽  
Execution Time ◽  
Health Informatics ◽  
Binary Data ◽  
Image Watermarking ◽  
Reversible Watermarking ◽  
Integer Wavelet Transform ◽  
Integer Wavelet ◽  
Reversible Image Watermarking ◽  
Watermarking Scheme

Health Informatics systems preserves the patient’s digital records. Two techniques that help in this process are watermarking and encryption. In this paper a reversible image watermarking scheme with logistic encryption is presented. The reversible watermarking is utilizing the concept of integer wavelet transform. The image is divided into sub bands and then the binary data is hidden in these sub bands. The watermarked wavelet sub bands are passed through logistic encryption module which scrambles the coefficients. These coefficients are then sent to inverse wavelet transform for image reconstruction. This process helps encrypt the image though spectral scrambling, thus resulting in faster and better encryption. The proposed algorithm outperforms the exiting algorithms in terms of execution time and the level of encryption.

5/3 integer wavelet transform for images based on Visual C++

2012 ◽  
Author(s):  
Lifei Jiao ◽  
Qiao Liu ◽  
Hua Zhou ◽  
Shanxue Yao ◽  
Yonggang Sun ◽  
...  
Keyword(s):  
Wavelet Transform ◽  
Integer Wavelet Transform ◽  
Integer Wavelet
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