A novel Watermarking Technique Based on Hybrid Transforms

This paper proposed Anovel watermarking scheme using hybrid of  Dual Tree Complex Wavelet Transform and singular value decomposition . Image watermarking is to embed copyright data in image bit streams. Our proposed technique demonestrates  the effective and robust of image watermarking algorithms using a hybrid of two strong mathematical transforms; the 2-level Dual Tree Complex Wavelet Transform (DT-CWT) and Singular Value Decomposition (SVD). This technique shows high level of security and robustness against attacks. The algorithm was tested for imperceptibility and robustness and the results were compared with DWT-SVD-based technique, it is shown that the proposed watermarking schemes is considerably more robust and effective

Evaluating routing protocols for intermittent energy harvesting IoT networks

Internet of Things (IoT) applications have evolved rapidly in the last few years, many of which use small, pervasive and locally-powered sensing devices. Energy harvesting techniques help to extend the lifetime of these devices.These devices can only work intermittently during power cycles when energy is available, but this is not taken into account by traditional routing protocols. Opportunistic routing is a solution that has been proposed in the literature. This paper evaluates the use of the RPL routing protocol and compares the performance of RPL with ORW and ORPL in intermittent energy harvesting IoT scenarios. The results show that ORPL slightly outperforms RPL in the number of received packets with different energy harvesting rate. These indicate that ORPL can be a better solution to the communication in multi hop intermittent energy harvesting IoT networks with some modifications

Routing in intermittently powered IoT networks

Internet of Things (IoT) applications have evolved rapidly in the past few years with applications in various domains such as smart cities. Energy harvesting techniques help to extend the lifetime of these devices. These devices can only work intermittently during power cycles when energy is available, but this is not taken into account by routing protocols. This paper evaluates the standard routing protocol RPL in an intermittent energy harvesting scenario for an IoT network and concludes that RPL is unsuitable due to the large number of lost packets caused by the unavailability of the intermittent node