http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/439 Sat, 27 Apr 2013 00:50:30 GMT 2013-04-27T00:50:30Z http://dyuthi.cusat.ac.in:80/xmlui/bitstream/id/703/comp appli1.jpg http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/439 http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/2080 Anomaly Detection Using System Call Sequence Sets Poulose Jacob, K; Surekha Miriam, Varghese This paper discusses our research in developing a generalized and systematic method for anomaly detection. The key ideas are to represent normal program behaviour using system call frequencies and to incorporate probabilistic techniques for classification to detect anomalies and intrusions. Using experiments on the sendmail system call data, we demonstrate that concise and accurate classifiers can be constructed to detect anomalies. An overview of the approach that we have implemented is provided. Sat, 01 Dec 2007 00:00:00 GMT http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/2080 2007-12-01T00:00:00Z http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/2079 A Multilingual Query Processing System using Software Agents Sumam Mary, Idicula; David Peter, S The goal of this work was developing a query processing system using software agents. Open Agent Architecture framework is used for system development. The system supports queries in both Hindi and Malayalam; two prominent regional languages of India. Natural language processing techniques are used for meaning extraction from the plain query and information from database is given back to the user in his native language. The system architecture is designed in a structured way that it can be adapted to other regional languages of India. . This system can be effectively used in application areas like e-governance, agriculture, rural health, education, national resource planning, disaster management, information kiosks etc where people from all walks of life are involved. Sat, 01 Dec 2007 00:00:00 GMT http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/2079 2007-12-01T00:00:00Z http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/2077 Use of Novel Algorithms MAJE4 and MACJER-320 for Achieving Confidentiality and Message Authentication in SSL & TLS Sheena, Mathew; Poulose Jacob, K Extensive use of the Internet coupled with the marvelous growth in e-commerce and m-commerce has created a huge demand for information security. The Secure Socket Layer (SSL) protocol is the most widely used security protocol in the Internet which meets this demand. It provides protection against eaves droppings, tampering and forgery. The cryptographic algorithms RC4 and HMAC have been in use for achieving security services like confidentiality and authentication in the SSL. But recent attacks against RC4 and HMAC have raised questions in the confidence on these algorithms. Hence two novel cryptographic algorithms MAJE4 and MACJER-320 have been proposed as substitutes for them. The focus of this work is to demonstrate the performance of these new algorithms and suggest them as dependable alternatives to satisfy the need of security services in SSL. The performance evaluation has been done by using practical implementation method. Tue, 01 Jan 2008 00:00:00 GMT http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/2077 2008-01-01T00:00:00Z http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/2076 Channel Adaptive MAC Protocol with Traffic-Aware Distributed Power Management in Wireless Sensor Networks-Some Performance Issues Binu, G S; Poulose Jacob, K In Wireless Sensor Networks (WSN), neglecting the effects of varying channel quality can lead to an unnecessary wastage of precious battery resources and in turn can result in the rapid depletion of sensor energy and the partitioning of the network. Fairness is a critical issue when accessing a shared wireless channel and fair scheduling must be employed to provide the proper flow of information in a WSN. In this paper, we develop a channel adaptive MAC protocol with a traffic-aware dynamic power management algorithm for efficient packet scheduling and queuing in a sensor network, with time varying characteristics of the wireless channel also taken into consideration. The proposed protocol calculates a combined weight value based on the channel state and link quality. Then transmission is allowed only for those nodes with weights greater than a minimum quality threshold and nodes attempting to access the wireless medium with a low weight will be allowed to transmit only when their weight becomes high. This results in many poor quality nodes being deprived of transmission for a considerable amount of time. To avoid the buffer overflow and to achieve fairness for the poor quality nodes, we design a Load prediction algorithm. We also design a traffic aware dynamic power management scheme to minimize the energy consumption by continuously turning off the radio interface of all the unnecessary nodes that are not included in the routing path. By Simulation results, we show that our proposed protocol achieves a higher throughput and fairness besides reducing the delay. Thu, 01 Jul 2010 00:00:00 GMT http://dyuthi.cusat.ac.in:80/xmlui/handle/purl/2076 2010-07-01T00:00:00Z