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Padma, T.
- IAR: Bio Inspired Intelligent Ant Routing Algorithm for Mobile Ad-Hoc Networks
Abstract Views :147 |
PDF Views:3
Authors
Affiliations
1 Sona College of Technology, Salem, IN
1 Sona College of Technology, Salem, IN
Source
Wireless Communication, Vol 4, No 8 (2012), Pagination: 437-441Abstract
The paper presents a novel proactive algorithm for routing called Intelligent Ant Routing (IAR), in mobile ad hoc networks, which is inspired by Ant Colony Optimization (ACO) framework and uses "ants" for route discovery, maintenance and improvement. The design for the protocol lies in a heuristic, based on bio inspired routing, which takes into account the limited resources in highly dynamic environment. The algorithm is based on a modification of the state transition rule of ACO routing algorithm which results in maintaining higher degree of investigation leads to reduced end-to-end delay and also lowers the overhead at high node density. The comparative result of proposed algorithm IAR with AODV reactive routing algorithm exhibits superior performance with respect to reactive AODV routing algorithm in terms of end-to end delay. It is also tested for different network sizes and node mobility.Keywords
Intelligent Ant Routing, Mobile Ad Hoc Networks, Ant Colony Optimization (ACO), Ad Hoc on Demand Distance Vector Routing (AODV).
- Secure Watermarking using Diophantine Equations for Authentication and Recovery
Abstract Views :207 |
PDF Views:0
Authors
Jayashree Nair
1,
T. Padma
2
Affiliations
1 Acharya Institute of Management & Sciences, Peenya, Bangalore, Karnataka, IN
2 Sona College of Engineering, Salem, Tamil Nadu, IN
1 Acharya Institute of Management & Sciences, Peenya, Bangalore, Karnataka, IN
2 Sona College of Engineering, Salem, Tamil Nadu, IN
Source
Journal of Network and Information Security, Vol 3, No 2 (2015), Pagination: 1-9Abstract
This paper describes an authentication scheme that uses Diophantine equations based generation of the secret locations to embed the authentication and recovery watermark in the DWT sub-bands. The security lies in the difficulty of finding a solution to the Diophantine equation. The scheme uses the content invariant features of the image as a selfauthenticating watermark and a quantized down sampled approximation of the original image as a recovery watermark for visual authentication, both embedded securely using secret locations generated from solution of the Diophantine equations formed from the PQ sequences. The scheme is mildly robust to Jpeg compression and highly robust to Jpeg2000 compression. The scheme also ensures highly imperceptible watermarked images as the spatio - frequency properties of DWT are utilized to embed the dual watermarks.Keywords
Diophantine Equations, Content Authentication, Authentication Watermark, Recovery Watermark, PQ Vector, DWT.- Performance Analysis of a Novel Image Content Authentication Scheme Using Multiple Watermarks in Dual Domains
Abstract Views :251 |
PDF Views:153
Authors
Jayashree Nair
1,
T. Padma
2
Affiliations
1 AIMS Institutes, Bangalore, IN
2 Sona College of Technology, Salem, IN
1 AIMS Institutes, Bangalore, IN
2 Sona College of Technology, Salem, IN
Source
Adarsh Journal of Information Technology, Vol 5, No 2 (2016), Pagination: 10-16Abstract
This paper presents a multiple watermark based semi-fragile watermarking scheme that tries to balance the requirements of an effective authentication scheme ensuring imperceptibility, tamper detection and localization of tampered areas. The proposed scheme uses multiple watermarks to enable authentication at multiple levels in the wavelet domain. The scheme is flexible and permits the user to decide on the number of watermarks to be embedded based on the nature of the application. It can also accurately locate the tampered locations.Keywords
Content Authentication, Authentication Watermark, Recovery Watermark, DWT, Tamper Localization, Robustness, Feature Vector.Full Text
References
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- Woo Chaw Seng1 et.al., “Semi-Fragile Watermark with Self Authentication and Self Recovery, “ Malaysian Journal of Computer Science, Vol. 22(1), pp 64-84, 2009.
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- X. Qi and X. Xin, “A quantization-based semi-fragile watermarking scheme for image content authentication,” Journal of Visual Communication and Image Representation, vol. 22, no. 2, pp. 187–200, 2011.
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- Chamlawi R., Khan A., Idris A. and Munir Z., “A Secure Semi-Fragile Watermarking Scheme for Authentication and Recovery of Images based on Wavelet Transform,” World Academy of Science, Engineering and Technology, Vol.23, pp.49-53, 2006.
- Qi, X., Xin, X., Chang, R. “Image authentication and tamper detection using two complementary watermarks,” 16th IEEE International Conference on Image Processing (ICIP). doi:10.1109/ICIP.2009. 5413681, 2009.
- A Chen, B., Wornell, G.W., “Digital watermarking and information embedding using dither modulation,” Proceedings of the IEEE workshop on Multimedia Signal Processing, Redondo Beach, CA, December, 1998.Transl. J. Magn. Japan, vol. 2, pp. 740-741, August 1987 [Digests 9th Annual Conf. Magnetics Japan, p. 301, 198.
- J. S. Pillai, T. Padma. “The analysis of PQ sequences generated from continued fractions for use as pseudorandom sequences in Cryptographic Applications.” In Proc. Advances in Intelligent Systems and Computing, Springer, Vol. 394, Dec. 2015, pp. 633-644.
- Intelligent Fuzzy Analytic Hierarchy Processing Decision Support System-An Aid in Expert Analysis of Shoulder and Neck Pain Occupational Risk Factors
Abstract Views :143 |
PDF Views:0
Authors
Affiliations
1 Department of Computer Applications, Sona College of Technology, Salem - 636 005, IN
1 Department of Computer Applications, Sona College of Technology, Salem - 636 005, IN
Source
Oriental Journal of Computer Science and Technology, Vol 5, No 2 (2012), Pagination: 303-313Abstract
This research develops a fuzzy decision support system (FDSS) to evaluate and prioritize the relative importance of the imprecise, uncertain and vague nature of risk factors causing shoulder and neck pain (SNP), an important musculoskeletal disorder and most ubiquitous pain complaint in an occupational environment. The objective involves derivation of mechanical-, physicaland psychosocial-related risk categories using knowledge acquisition implemented by identifying the risk factors through literature analysis, conventional and concept mapping interviews with expert neurologist, orthopaedict, psychologist and physiotherapist. Fuzzy analytic hierarchy process (FAHP) is applied as an evaluation tool to measure the significance of the risk factors. The results indicate that the proposed system supplements SNP diagnosis experts with more precise key decision support information.Keywords
Fuzzy Analytic Hierarchy Process, Decision Support System, Musculoskeletal Disorder, Domain Expert, Risk Factors.Full Text