An Efficient Semantic Multi Keyword Search Using Snippets
Authors: Sathiyamoorthy. S, T.Rajkumar
Abstract
The advent of cloud computing, data owners are motivated to outsource their complex data management systems from local sites to commercial public cloud for great flexibility and economic savings. But for protecting data privacy, sensitive data has to be encrypted before outsourcing, which obsoletes traditional data utilization based on plaintext keyword search. Thus, enabling an encrypted cloud data search service is of paramount importance. Considering the large number of data users and documents in cloud, it is crucial for the search service to allow multi-keyword query and provide result similarity ranking to meet the effective data retrieval need. Related works on searchable encryption focus on single keyword search or Boolean keyword search, and rarely differentiate the search results. I propose a basic MRSE scheme using secure inner product computation, and then significantly improve it to meet different privacy requirements in two levels of threat models.
Securing Routing Protocol by Distributed Key Management and Threshold Cryptography in Mobile Ad hoc Network
Authors: Neha Gupta, Manish Shrivastava
Abstract
Security is a major concern in mobile ad hoc network due to its various characteristics like infrastructure less nature, self configuring etc. Threshold cryptography used in key distribution of mobile ad hoc network enhances security by distributing each part of the divided secret key to each node. It is an effective technique as it refreshes the shares of each share holder periodically. It maintains the security by interchanging the shares among its share holders to prevent unauthorized access. In this paper we are using Threshold cryptography concept on ad hoc on demand distance vector routing protocol to increase the security of mobile ad hoc network. In this paper I propose a secured approach which I call secure ad hoc on demand distance vector and showing the behaviour of throughput, packet delivery ratio, average end to end delay and routing overhead of AODV and SAODV
Handwritten Hindi Character Recognition System Using Edge detection & Neural Network
Authors: Tanuja K, Usha Kumari V, Sushma T M
Abstract
Handwritten recognition has been one of the active and challenging research areas in the field of Image processing. Most of the current work in these areas is limited to English and a few oriental languages. Handwritten characters are written in various curved & cursive ways with different sizes, orientations, thickness and dimensions which is difficult task to recognize the handwritten characters by machine. In this paper a novel technique for Handwritten Hindi Character Recognition System is implemented using Canny Edge Detection technique and artificial neural network. The steps used for Handwritten Hindi character recognition system are – 1.Scanning 2.Preprocessing 3.Segmentation 4.Canny operator 5.Distance transformation 6. Feature Extraction 7. Feed Back Propagation of Artificial Neural Network for Recognition. Experimental result shows that this approach provides better results as compared to other techniques performance of the system in 95%.
Synthesis of Some Sulphur and Nitrogen Containing Heterocyclic Compounds
Authors: Varsha A. Dighe, Rohini R. Pujari
Abstract
A novel series of some substituted thiadiazole derivatives were synthesized by known standard methods using analytical grade chemicals with the aim to get better antidiabetic and antitubercular activity. The structures of synthesized compounds were supported by means of physicochemical test and IR spectroscopy.