In this paper, main focus is on the development of an encryption-decryption framework using some object oriented language and its development. The environmental analysis is done with the help of various types of UML diagrams and then its framework for implementation is designed. Basically, object-oriented analysis (OOA) and object-oriented design (OOD) methodologies examine the problem in the real world and facilitate in decomposing the problem in terms of classes, and some relationships between classes. A framework for implementation of visual cryptography based on encryption and decryption is presented and implemented. Target image is converted into black & white image and one digitized image, after that both are send to user site separately. Decryption is performed by the overlapping of these two images. General Terms Encryption, Decryption, Extended Visual Cryptography, Unified Modeling Language (UML)

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Framework for Visual Cryptographic based Encryption and Decryption

Color image share cryptography: a novel approach

Security has become an important issue in the world of information technology. In recent years the people from all over the world rely on internet in order to transmit and share their information where they are mostly concerned on information security to protect it. For security purpose people uses symmetric or asymmetric cryptography. Cryptography is the study of mathematical technique or algorithms related to information security. But in the traditional cryptographic approach encryption and decryption both require complex arithmetic computation. Visual cryptography provides information security which uses simple algorithm for encryption and no algorithmic computation for decryption process. With Visual Cryptography technique encryption of image or text can be done with simple arithmetic and decryption can be done directly with human visual system. Rapid growth of digital media has made digital images easy to distribute, duplicate and made changes to it. This paper provides summary of emerging Visual Cryptography techniques for creating image secure shares and application areas where it can be applied.

Seema Rani

Papers

Visual Cryptography for Image Secure Shares