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Muthukumar, G.
- Managing Trust and Detecting the Guilty Party in P2P Networks
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Authors
Affiliations
1 P.S.R. Rengasamy College of Engineering for Women, Sivakasi, IN
1 P.S.R. Rengasamy College of Engineering for Women, Sivakasi, IN
Source
Networking and Communication Engineering, Vol 4, No 6 (2012), Pagination: 343-346Abstract
Our Enhanced system increases the security in data transfer and identifying the intruder in that communication. Due to the lack of secure routing protocols for unstructured overlays we have started to investigate a possible solution for these systems. Through analytical study and experimental results we demonstrate the secure routing protocols potential in providing a secure topology management service for a broad range of node classes and communication capabilities. We show that it is possible to combine security, scalability and adaptability in one mechanism allowing each node to achieve an adequate level of security to meet the overall system requirements. A data distributor has given sensitive data to a set of supposedly trusted agents (third parties). Some of the data are leaked and found in an unauthorized place. We propose data allocation strategies (across the agents) that improve the probability of identifying leakages. In some cases, we can also inject “realistic but fake” data records to further improve our chances of detecting leakage and identifying the guilty party.Keywords
Distributed Hash Table, Routing Protocols, Secure Routing, Unstructured P2P.
- Production And Partial Purification of α-amylase Producing Streptomyces sp. SNAJSM6 Isolated From Seaweed Sargassum myriocystum J. Agardh
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Authors
Affiliations
1 Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, Tamil Nadu, IN
1 Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, Tamil Nadu, IN
Source
Indian Journal of Geo-Marine Sciences, Vol 48, No 8 (2019), Pagination: 1245-1251Abstract
The bacteria Streptomyces sp. was isolated from the seaweed Sargassum myriocystum that was collected from Kilakarai, Ramanathapuram District, Tamil Nadu. Among the isolates, the SNAJSM6 produced the maximum content of extracellular α-amylase, which was conformed by starch hydrolysis and identified as Streptomyces sp. SNAJSM6. The culture optimization studies for augmented enzyme production in the Streptomyces sp. were conducted under different physicochemical parameters, such as pH, temperature, and carbon and nitrogen sources for α-amylase production. The maximum α- amylase production was recorded on the third day of incubation (56U/ml) by Streptomyces sp. SNAJSM6. The Streptomyces sp. optimized α-amylase enzyme production was recorded at pH 7.0 and temperature 30 °C, which was 1.86 fold higher than the unoptimized culture broth of the Streptomyces sp. The Streptomyces sp. α-amylase enzyme was partially purified and its molecular weight was found to be 44 kDa by using SDS-PAGE. Among the isolates that were screened, Streptomyces sp. SNAJSM6 is a potential candidate for maximum production of α-amylase. Further, it showed excellent antibacterial activity against selected human pathogens.Keywords
Sargassum myriocystum, Streptomyces Sp., α-amylase, Antibacterial Activity.Full Text
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