M.Sc. Tezi Görüntüleme

      Networking technology have improved considerably over the last decade. Data sources like military, commercial and medical image databases which needs to be confidential are stored and processed on the cloud. Likewise, video conferencing, resource sharing and video on demand applications require reliable, fast and robust security systems. Standard encryption methods designed to encrypt text messages can not fulfill image encryption requirements due to both high correlation among adjacent pixels and vast amount of data. Therefore, encryption methods to process multimedia content like image and video stream are an active research field for scientists. In particular, application of chaos theory in multimedia content encryption is one of the active research topics.

      Fundamentals of cryptography and issues in multimedia content encryption are presented first. Then general theory of chaos is outlined and similarity to cryptography is investigated. An image encryption system with confusion and diffusion based on a chaotic map is designed and implemented. Statistical and security analysis measures of well known test images encrypted by both the chaotic and standard encryption methods are compared.

      Keywords: Chaos, Dynamic Systems, Image Encryption, Randomness, Diffusion, Confusion, Cryptanalysis.