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Naresh Kumar Reddy B.,Koneru Lakshmaiah College of Engineering | Naga Raju C.,Yv University | Sridhar K.,Yv University
International Journal of Applied Engineering Research | Year: 2014

In Automated Teller Machines (ATMs) fraud became more widespread. Computation of biometric offers an effective approach for ATM customer's identification/verification with unique physical/behavioural characteristics. In this paper a new framework is designed to enhance level of security at ATM's by doing customer verification with palm print recognition. First, method extracts low frequency palm print features by applying 2D DCT (Discrete Cosine Transform).Features of training and test sets are matched using Euclidian distance. Experimental results shows promising performance of proposed method with high level of recognition rate against standard and local databases namely PolyU Palm print and LBRCE_PALM_DB. © Research India Publications.


Suresh Babu E.,Koneru Lakshmaiah College of Engineering | Nagaraju C.,YV University | Krishna Prasad M.H.M.,JNTUK
Advances in Intelligent Systems and Computing | Year: 2016

DNA cryptography is a new cryptographic paradigm from hastily growing biomolecular computation, as its computational power will determine next generation computing. As technology is growing much faster, data protection is getting more important and it is necessary to design the unbreakable encryption technology to protect the information. In this paper, we proposed a biotic DNA-based secret key cryptographic mechanism, seeing as DNA computing had made great strides in ultracompact information storage, vast parallelism, and exceptional energy efficiency. This Biotic Pseudo DNA cryptography method is based upon the genetic information on biological systems. This method makes use of splicing system to improve security and random multiple key sequence to increase the degree of diffusion and confusion, which makes resulting cipher texts difficult to decipher and makes to realize a perfect secrecy system. Moreover, we also modeled the DNA-assembled public key cryptography for effective storage of public key as well as double binded encryption scheme for a given message. The formal and experimental analysis not only shows that this method is powerful against brute force attack and chosen cipher text attacks, but also it is very efficient in storage, computation as well as transmission. © Springer India 2016.


Suresh Babu E.,JNTUK | Nagaraju C.,YV University | Prasad M.H.M.K.,Jawaharlal Nehru Technological University Anantapur
Procedia Computer Science | Year: 2015

This paper presents a novel concept for designing an efficient security solution that can protect wireless ad hoc networks from heterogeneous attacks. This proposed Secure Routing Protocol against Heterogeneous Attacks (SRPAHA) protocol effectively detects and defends the collaborative malicious node without the need of expensive signatures. Finally, this methods had been validated through numerous simulation scenarios that synthetically generates the data sets and verifies using various parameters such as Route Acquisition Time, Throughput (or packet delivery ratio), Routing Overhead and Average End-to-End Delay. Moreover, the results of this work provide better performances as compared to existing security schemes in-terms of security, less communication overhead. © 2015 The Authors.


Prathima B.,Sv University | Subba Rao Y.,Sv University | Adinarayana Reddy S.,Yv University | Reddy Y.P.,Sri Padhmavati Mahila Visva Vidyalayam Womens University | Varada Reddy A.,Sv University
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy | Year: 2010

Benzyloxybenzaldehyde-4-phenyl-3-thiosemicarbazone ligand (L) has been synthesized from benzyloxybenzaldehyde and 4-phenyl-3-thiosemicarbazide. Complexes of this ligand with chlorides of Cu(II) and Ni(II) have been prepared. The structure of the ligand (L) is proposed based on elemental analysis, IR and 1H NMR spectra. Its complexes with Cu(II) and Ni(II) ions are characterized from the studies of electronic as well as EPR spectra. On the basis of electronic and EPR studies, rhombically distorted octahedral structure has been proposed for Cu(II) complex while the Ni(II) complex has been found to acquire an octahedral structure. The ligand and their metal complexes have been tested in vitro for their biological effects. Their antibacterial activities against Gram-negative bacteria (Escherichia coli and Klebsiella pneumoniae) and Gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis) have been investigated. The prepared metal complexes exhibit higher antibacterial activities than the parent ligand. The in vitro antioxidant activity of free ligand and its metal(II) complexes have also been investigated and the results however reveal that the ligand exhibits greater antioxidant activity than its complexes. © 2010 Elsevier B.V.


Suresh Babu E.,Koneru Lakshmaiah College of Engineering | Nagaraju C.,YV University | Krishna Prasad M.H.M.,UEC
Advances in Intelligent Systems and Computing | Year: 2016

This paper addresses a novel method to detect and defend against the blackhole attack and cooperative blackhole attack using hybrid DNA-based cryptography (HDC) mechanism. Moreover, the proposed method upsurge the security issue with the underlying AODV routing protocol. Eventually, this HDC is one of the high potential candidates for advanced wireless ad hoc networks, which require less communication bandwidth and memory in comparison with other cryptographic systems. The simulation results of this proposed method provide better security and network performances as compared to existing schemes. © Springer Science+Business Media Singapore 2016.


Babu E.S.,Koneru Lakshmaiah College of Engineering | Nagaraju C.,Yv University | Prasad M.H.M.K.,Jawaharlal Nehru Technological University Anantapur
International Journal of Information Security and Privacy | Year: 2016

Secure communication is one of the basic requirements for any network standard. Particularly, cryptographic algorithms have gained more popularity to protect the communication in a hostile environment. As the critical information that is being transferred over the wireless adhoc networks can be easily acquired and is vulnerable to many security attacks. However, several security communication threats had been detected and defended using conventional symmetric and asymmetric cryptographic mechanism, which are too difficult and resource consuming for such mobile adhoc networks. Recently, one of the severe security threats that have to be detected and defend in any type of network topology is blackhole attack and cooperative blackhole. Because of its severity, the black hole attack has attracted a great deal of attention in the research community. Comprehensively the results of the existing system conclude that the black hole attack on various mobile adhoc networks is hard to detect and easy to implement. This paper addresses to detect and defend the blackhole attack and cooperative blackhole attack using hybrid DNA-based cryptography (HDC) mechanism. Moreover, the proposed method upsurge the security issue with the underlying AODV routing protocol. Eventually, This Hybrid DNA-based Cryptography (HDC) is one of the high potential candidates for advanced wireless ad hoc networks, which require less communication bandwidth and memory in comparison with other cryptographic systems. The simulation results of this proposed method provide better security and network performances as compared to existing schemes. Copyright © 2016, IGI Global.


Siva Pratap Reddy M.,Sri Venkateswara University | Ashok Kumar A.,Yv University | Rajagopal Reddy V.,Sri Venkateswara University
Thin Solid Films | Year: 2011

The electrical transport properties of Ni/Pd/n-GaN Schottky barrier diodes (SBDs) have been investigated in the wide temperature range of 100-425 K. An abnormal decrease in the experimental barrier height (φb) and an increase in the ideality factor (n) with a decrease in the temperature have been observed. The observed variation in φbo and n is attributed to the spatial barrier inhomogeneities in Schottky barrier height by assuming a Gaussian distribution (GD) of barrier heights (BHs) at 100-175 K and 175-425 K. The temperature-dependent current-voltage characteristics of the SBDs has shown a double Gaussian distribution giving mean barrier heights of 0.65 eV and 1.21 eV and standard deviations of 0.085 and 0.159 V, respectively. A modified ln (Io/T2)-q2σo 2/2k2T2 versus 103/T plot for the two temperature regions gives φbō and A* as 0.713 eV and 13.56 A cm- 2 K- 2, and 1.34 eV and 28.645 A cm- 2 K- 2 respectively. Such temperature dependence of modified Richardson plot and electrical parameters of Ni/Pd/n-GaN SBD can be explained based on the thermionic emission theory with double GD of BHs due to the barrier height inhomogeneities at the metal/semiconductor interface. The themionic field emission is considered as the phenomena responsible for the excess currents observed in both forward and reverse direction of Schottky barriers. © 2011 Elsevier B.V. All rights reserved.


Reddy V.R.,Sri Venkateswara University | Reddy M.S.P.,Sri Venkateswara University | Kumar A.A.,Yv University | Choi C.-J.,Chonbuk National University
Thin Solid Films | Year: 2012

In the present work, thin film of polyvinyl alcohol (PVA) is fabricated on n-type InP substrate as an interfacial layer for electronic modification of Au/n-InP Schottky contact. The electrical characteristics of Au/PVA/n-InP Schottky diode are determined at annealing temperature in the range of 100-300°C by current-voltage (I-V) and capacitance-voltage (C-V) methods. The Schottky barrier height and ideality factor (n) values of the as-deposited Au/PVA/n-InP diode are obtained at room temperature as 0.66 eV (I-V), 0.82 eV (C-V) and 1.32, respectively. Upon annealing at 200°C in nitrogen atmosphere for 1 min, the barrier height value increases to 0.81 eV (I-V), 0.99 eV (C-V) and ideality factor decreases to 1.18. When the contact is annealed at 300°C, the barrier height value decreases to 0.77 eV (I-V), 0.96 eV (C-V) and ideality factor increases to 1.22. It is observed that the interfacial layer of PVA increases the barrier height by the influence of the space charge region of the Au/n-InP Schottky junction. The discrepancy between Schottky barrier heights calculated from I-V and C-V measurements is also explained. Further, Cheung's functions are used to extract the series resistance of Au/PVA/n-InP Schottky diode. The interface state density as determined by Terman's method is found to be 1.04 × 10 12 and 0.59 × 10 12 cm - 2 eV - 1 for the as-deposited and 200°C annealed Au/PVA/n-InP Schottky diodes. Finally, it is seen that the Schottky diode parameters changed with increase in the annealing temperature. © 2012 Elsevier B.V.

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