An Identity based cryptography based on visual cryptography scheme was proposed for protecting color image. A color image to be protected and authentic entities such as account number, password, signature image are given as input. The binary key image is obtained by distributing the digital signature of obtained authentic entities. A secret color image which needs to be communicated is decompos...

Cyber security and privacy are sources of increasing importance for the successful deployment of information and communication technology. This paper investigates aspects concerning privacy during the communication of low color depth images in encrypted form via low bit-rate, error prone channels. Existing approaches for region of interest determination in images, image encryption and image com...

In this paper, a new image encryption scheme for colour BMP images using a secret key of 120-bits is proposed. Initially, image is divided into blocks subsequently into color components. Each color component is modified by performing bitwise operation which depends on secret key used in algorithm as well as a few most significant bits of its previous and next color component. Three rounds are t...

Rodent monitoring in biomedical laboratories is a time consuming and tedious task. Several automatic solutions that rely on different types of sensors have been proposed. Computer vision provides a significantly more universal and less intrusive solution. In this article we propose a new method to detect and classify three behaviors in rodents: Exploring, Rearing, and Static. The method uses Mo...

This paper presents a faster and efficient algorithm to encrypt large size 24-bit color medical images. The algorithm generates permutation sequences which shuffles the image pixels and color bytes. The generated masking sequences alters the value of the pixels and color bytes. The dynamic chaotic parameters initialisation is one of the key factors in the proposed cryptosystem. Further, the key...

Received Feb 26, 2014 Revised May 15, 2014 Accepted May 20, 2014 Image information security plays a vital role in computing and communication technologies. This paper describes a new concept of expand and shrink to enhance the strength of chaos based image encryption technique. This method consists of both permutations as well as substitution process for image scrambling and encryption. In perm...

Security and privacy issues of the transmitted data have become an important concern in multimedia technology. In this paper, we propose a computationally efficient and secure video encryption algorithm. This makes secure video encryption feasible for real-time applications without any extra dedicated hardware. We achieve computational efficiency by exploiting the frequently occurring patterns ...