ABSTRACT During this case, cheque is scanned and

ABSTRACT

                In
recent years, bank systems are connected by the network technology all over the
world. Core banking network plays a vital role in transactions. Customers can
be able to transfer and receive money in their account via various ways which
is allowed by the banks. Payments are made by various methods such as demand
draft, National Electronic Fund Transfer(NEFT) payment system, Real Time Gross
settlement(RTGS) payment system and cheque. Cheque truncation system in bank
clear the cheque  payment. It is useful for
the employee to clear the cheque from home branch to the clearing house of cheque
branch. During this case, cheque is scanned and the scanned image is transfer
by the cheque truncation system to clearing house of cheque branch through the
communication channel. Copyright protection and security for cheque image issue
arises during the transmission through the digital communication channel. To
overcome this issue, Discrete Wavelet Transform(DWT) – Singular Value
Decomposition(SVD) transform and RC4 Techniques with Chaotic Logistics Map
(CLM) are used. It helps the cheque image to facilitate digital image watermarking
and provides security for copyright protection. The strong key is provided by
the Chaotic Logistics Map function. The proposed work converts the initial
value from the key and this value is given as input for the CLM function then
this generate sequence of 256-bit key array. The final stage is the permutation
process and the result is get XORed with the plain image to produce the cipher
image and vice versa. The experimental results shows that the proposed work:
(a) provides the cipher image cannot be visually identified, (b) the
statistical correlation between the plain image and cipher image is eliminate,
(c) very sensitive to small changes in key, (d) provides no change in image
during encryption and decryption process, (e) robust to a wide range of attacks
such as cropping attack, Gaussian noise, JPEG compression attack, rotation
attack, brightness attack, contrast attack.

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INTRODUCTION

                A digital
watermarking is a marker covertly embedded in a noise tolerant signal such as
text, image, audio, video. It is widely used for identifying ownership and
copyright protection of a image. In digital image watermarking, the digital
information of a watermark image is hidden in a carrier image but it does not
contain a information of a carrier image.  DWT-SVD provides robustness against various
attacks and the imperceptibility of hidden information. Digital watermarking
scheme is the combination of Discrete Wavelet Transform and Singular Value Decomposition.
The transformed image’s matrix decomposed into each level of decomposition for
two dimensional DWT. The decomposed matrices into four frequencies such as LL,
HL, LH and HH frequencies. The watermark image is embedded in all of these
frequencies leads to negative correlated and posses negative film effect during
the extraction process. In order to increase the robustness by adding the
singular values to HH frequency band in DWT. It is highly sensitive to human
visual system, which maintains the perceptual quality of the watermarked image.
Due to high development in network and communication technology, there is a
need for providing secure communication while exchanging confidential
information like image, audio and video. It can be achieved by changing the
shape of the transmitted image, which is called as encryption. In this process,
the image encrypted with the help of encryption algorithm and secret key. In Wired
Equivalent Privacy, the image is encrypted by using RC4 encryption algorithm. During
the encryption process, long pseudorandom bits are generated by the Chaotic
Logistics Map function. It improves the confusion and diffusion by the discrete
exponential chaotic maps and it provides strong resistance to brute force
attack, statistic attack and differential attack. During the transmission of
cheque image intruders may attack the encrypted image. Hence it can be evaluate
by active and passive attack such as cropping attack, Gaussian noise, JPEG
compression attack, rotation attack, brightness attack, contrast attack.

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