An Effective Private Data storage and Retrieval System using Secret sharing scheme based on Secure Multi-party Computation

Privacy of the outsourced data is one of the major challenge.Insecurity of the network environment and untrustworthiness of the service providers are obstacles of making the database as a service.Collection and storage of personally identifiable information is a major privacy concern.On-line public databases and resources pose a significant risk to user privacy, since a malicious database owner may monitor user queries and infer useful information about the customer.The challenge in data privacy is to share data with third-party and at the same time securing the valuable information from unauthorized access and use by third party.A Private Information Retrieval(PIR) scheme allows a user to query database while hiding the identity of the data retrieved.The naive solution for confidentiality is to encrypt data before outsourcing.Query execution,key management and statistical inference are major challenges in this case.The proposed system suggests a mechanism for secure storage and retrieval of private data using the secret sharing technique.The idea is to develop a mechanism to store private information with a highly available storage provider which could be accessed from anywhere using queries while hiding the actual data values from the storage provider.The private information retrieval system is implemented using Secure Multi-party Computation(SMC) technique which is based on secret sharing. Multi-party Computation enable parties to compute some joint function over their private inputs.The query results are obtained by performing a secure computation on the shares owned by the different servers.Comment: Data Science & Engineering (ICDSE), 2014 International Conference, CUSA

Ammonia sensing using lossy mode resonances in a tapered optical fibre coated with porphyrin-incorporated titanium dioxide

The development of an ammonia sensor, formed by the deposition of a functionalised titanium dioxide film onto a tapered optical fibre is presented. The titanium dioxide coating allows the coupling of light from the fundamental core mode to a lossy mode supported by the coating, thus creating lossy mode resonance (LMR) in the transmission spectrum. The porphyrin compound that was used to functionalise the coating was removed from the titanium dioxide coating upon exposure to ammonia, causing a change in the refractive index of the coating and a concomitant shift in the central wavelength of the lossy mode resonance. Concentrations of ammonia as small as 1ppm was detected with a response time of less than 1min. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only

Genetic characterization and protein profiling of green mussel (Perna viridis (Linnaeus, 1758)) and brown mussel (Perna indica Kuriakose and Nair, 1976)

The marine mussels of India are mainly of two species: Perna viridis [Linnaeus, 1758) (green mussel) and Perna indica Kuriakose and Nair (1976) [brown mussel). In addition to this, along the south west coast (Kollam coast f Kerala), a third type of mussel called parrot mussel has also been reported. The present study was undertaken for genetic characterisation and dentification of distinct stocks if any, within green as well as brown mussels, From both east and west coast, using shell morphometrics and molecular markers. Stock identification using shell morphometrics were attempted with Principal Component Analysis and Canonical Discriminant function Analysis, whereas, molecular methods used were protein electrophoresis (Native - Poly Acrylamide Gel Electrophoresis) and Randomly Amplified Polymorphic DNAPolymerase Chain Reaction (RAPD-PCR). The shell morphometrics as well as Native PAGE and RAPD-PCR profiles gave concordant results indicating high intraa species homogeneity and low level of genetic differentiation among populations of both green and brown mussels. Genetic characterisation using RAPD markers could bring out the genetic variability within both the populations. Elucidation of the genetic identity of parrot mussel as to whether it is a true hybrid of green and brown mussel, or only a colour variant of any of them was also done using RAPD, shell morphometrics, protein electrophoresis (native PAGE, SDS (Sodium Dodecyl Sulphate) PAGE and allozymes) and mitochondria1 (mt) DNA gene (Cytochrome oxidase 1) analysis. The study concluded that the parrot mussel is not a hybrid of the two, but only a colour variant of the brown mussel. An initial attempt to resolve the taxonomic ambiguity of P.indica that it is only a synonym of globally distributed Perna perna, as suggested by some of the previous workers has also been made in this study using COI regions of mt DNA. As P. indica revealed only 5% divergence from P, perna, it was concluded that P. indica need not be relegated as a synonym of P.pern

Photoluminescence and EPR studies of ZnS nanoparticles Co-doped with Mn and Te

ZnS nanoparticles Co-doped with Mn and Te (x = 0.05 and 0.10) have been synthesized for the first time by chemical co-precipitation method, thiophenol is used to passivate the surface of the particles. The as-prepared samples were amorphous in nature. Nanocrystallinity was induced after calcining the samples at 300oC/2hrs. The obtained nanoparticles were subjected to X-ray diffraction (XRD), Energy Dispersive Analysis of X-rays (EDAX), Transmission Electron Microscopy (TEM), hotoluminescence (PL) and Electron Paramagnetic Resonance (EPR) studies. All the samples exhibited cubic structure and the particle size was found to be 3-5 nm. EDAX revealed that the compositions did not deviate much from the target compositions. The photoluminescence studies showed emission in the red region and the emission wavelength is varied with composition. The Electron Paramagnetic Resonance (EPR) spectra showed paramagnetic nature of the samples at room temperature. EPR and PL results were quite consistent with each other. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2197