Encrypted Data Hiding In Encrypted Images Essay

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Encrypted Data Hiding in Encrypted Images
R.Suchitra Department of ECE SSN College of Engineering Chennai, India suchitra.senthilkumar@gmail.com C.Vinothkumar Department of ECE SSN College of Engineering Chennai, India vinothkumarc@ssn.edu.in

Abstract—Data hiding is

the process of secretly embedding information into data sources such as image, video, or audio signals without changing the perceptual quality of the data. The encryption is a general method for providing privacy protection such as confidentiality, data integrity, entity authentication and data origin authentication. Data hiding scheme for encrypted image is made of image encryption, data embedding and data extraction. The original image and the data to be embedded are encrypted and the data is embedded into the encrypted image. In the decryption side, the encrypted data is first extracted and decrypted using the encryption key. Secondly, the encrypted image is decrypted for further analysis. The main objective of this paper is to study the various encryption schemes to encrypt both image and data and to propose a new encryption algorithm for both image and data hiding.

Index Terms— Cryptography, Data hiding, Cat map transform.

I. INTRODUCTION the science of writing a secret code Cryptography is of mathematical techniques related (or) the study to aspects of information security such as confidentiality, data integrity, entity authentication and data origin authentication. The basic cryptographic schemes used are Symmetric (or) Secret key cryptography and Asymmetric (or) Public key cryptography. It employs complex computational algorithms for encryption and decryption. In order to reduce the complexity, Cryptography schemes can be used. The main need of cryptography is to hide the data with the secret key without knowing to the user. Due to the fast progression of data exchange in electronic way, information security is becoming more important in data storage and transmission. Because of...

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