In Wireless networks, the security of data and information has important role in digital communication and multimedia communication. Different types of encryption algorithms have an important role to provide the security to the wireless networks. Cryptography basically used for the data confidentiality and privacy by making indiscernible. Hence the original data cannot be interrupted by the una...

Since early 1990s, chaos has been widely investigated to construct multimedia encryption scheme for its good cryptography-like characteristics, such as the ergodicity, mixing and exactness property and the sensitivity to initial conditions. This thesis is concerned with the cryptanalyses of some recently-proposed chaos related multimedia encryption schemes. The security of the schemes against s...

Privacy has received much attention but is still largely ignored in the multimedia community. Consider a cloud computing scenario, where the server is resource-abundant and is capable of finishing the designated tasks, it is envisioned that secure media retrieval and search with privacy-preserving will be seriously treated. In view of the fact that scaleinvariant feature transform (SIFT) has be...

H.264 video coding standard is one of the most promising techniques for the future video communications. In fact, it supports a broad range of applications. Accordingly, with the continuous promotion of multimedia services, H.264 has been widely used in real-world applications. A major concern in the design of H.264 encryption algorithms is how to achieve a sufficiently high security level, whi...

As the evolution of computer technology introduces new advances in networks among others, online gaming becomes a new trend. Following the trends of our era, The Games At Large IST Project introduces an innovative platform for running interactive, rich content multimedia applications over a Wireless Local Area Network. The Games at Large project’s vision is to provide a new system architecture ...

Many applications, such as wireless communications, high speed multimedia data streaming systems and sensor networks, call for strong ciphers with low computation complexity and high speed in encryption and decryption. Additive stream ciphers usually have lower computation complexity and thus provide higher encryption/decryption speed than block ciphers. An additive stream cipher usually encryp...

With the advent of ubiquitous access to multimedia content via wireless networks, users are more likely to have their data traverse a heterogeneous internetwork. Given the open nature of the Internet and wireless links, more users will demand end-to-end confidentiality. However, because of inherent error-expansion properties of secret-key encryption, it is a challenge to provide good subjective...

Digital video is one of the most popular multimedia data exchanged over the internet. Previous cryptography studies have focused on text data. The encryption algorithms developed for text data may not be suitable to multimedia applications because of large sizes of video. Analgorithm is proposed in which a video file is encrypted by considering each frame a colour image. Each video is broken do...