In this paper, A novel architecture of an Application Specific Instruction Processor (ASIP) for scalable DFT/IDFT DCT/IDCT 1D (N-point) and 2D (N × M point) engine is proposed. An in place configurable radix 2/3/4 butterfly, makes possible the implementation of two radix N/M is varied in the form of 2 x × 3 y . Therefore the engine can support different communication and signal processing applications. A new address generator scheme is proposed which achieves conflict-free memory access. This scheme is based on partitioning the memory to 4 dual-port memory banks with a continuous address generator to accommodate high-speed requirements. Using same reduction techniques, the twiddle factors memory size is reduced to 28%. By taking advantage of programmability, the engine provides more configurability and flexibility in switching between modes in run-time. Moreover it can be easily adapt to new applications. The DFT/DCT engine requires only 1280 clock cycles for a 1024-point DFT-1D and runs at 120 MHz with SQNR 75.2 dB.
Mobile application systems (mobile apps) are now being commonly installed in smart phones or mobile devices. Many of these mobile apps are dealing with sensitive or confidential information that requires good protection using strong user authentication. This study has proposed an improved user authentication model which is aimed not only to obtain strong user authentication but also to be acceptable by users. The strong user authentication is achieved using the combination of three security techniques namely multi-factoring, ciphering and watermarking techniques while the level of acceptance by users is measured using a quantitative research method. This method consists of three research instruments namely expert review, pilot study and survey. However, this paper only focuses on how the expert review is being carried out to obtain the consent whether the proposed model is valid and feasible. Questionnaires for the expert review are constructed based on the model being proposed including the techniques and targeted benefits. From the review results, a modification is required related to the number of expert reviewers to be increased. Others are just suggestions which are not critically affecting the study. With this modification being done, and justifications being made, the expert reviewers finally agree that the proposed model is valid and feasible. This means the proposed model is capable in providing strong and acceptable user authentication for mobile apps.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.