Various compression methods have been proposed to achieve high compression ratios and high image qualities in low computation time.One of these methods is Fractal Image Compression. The basic idea of fractal image compression is the partitioning of input image into nonoverlapping range blocks. For every range block a similar but larger domain block is found. The set of coefficients of mapping the domain
It is becoming easier to tamper with digital images in ways that are difficult to detect .In this work a semi-fragile watermarking scheme is presented. This scheme is applied to digital color image in spatial domain.
Computer network technologies have grown rapidly in the last few decades. With the increased use of networked computers for critical applications, computer intrusions have been increased and became a significant threat to these systems and, thus Intrusion Detection Systems (IDS) have become essential addition to security infrastructure of most organizations.This thesis presents the design and plementation of a Network Node Intrusion Detection System (NNIDS) that support IPv4 protocol.
