Browsing by Author "Aithal, G."

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High-speed and secure encryption schemes based on chinese remainder theorem for storage and transmission of medical information
(2010) Aithal, G.; Hari Bhat, K.N.; Acharya, U.S.
Medical records generated in hospitals often contain private and sensitive information. This privileged information must be prevented from falling into wrong hands. Thus, there is a strong need for developing a secure cryptographic scheme that can be adapted to use in conjunction with transmission and storage of medical information. Previous approaches have proposed the use of the advanced encryption standard (AES) algorithm for this purpose. In this article, we are proposing a new robust, high-speed, and secure cryptographic scheme that has the added advantage of being immune to side-channel attacks. In our article, we have shown that the performance of this scheme is superior in certain aspects to that of the A5/1 system used in global system for mobile (GSM) systems. The parallel architecture employed in this scheme makes it suitable to use in systems where the data-processing operations have to be carried out in real time. Residue number systems (RNS) based on Chinese remainder theorem (CRT) permits the representation of large integers in terms of combinations of smaller ones. The set of all CRT number system representation of an integer from 0 to M-1 with component wise modular addition and multiplication constitutes a direct sum of smaller commutative rings. An encryption and decryption algorithm based on the properties of direct sum of smaller rings offers distinct advantages over decimal or fixed radix arithmetic. We have utilized the representation of integers using CRT to successfully design additive, multiplicative, and affine stream cipher systems. The use of number system based on CRT allows speeding up the encryption/decryption algorithms, reduces the time complexity, and provides immunity to side-channel, algebraic, and known plain text attacks. In this article, the characteristics of additive, multiplicative, and affine stream cipher systems based on CRT number system representation have been studied and analyzed. © 2010 World Scientific Publishing Company.
Implementation of stream cipher system based on representation of integers in residue number system
(2010) Aithal, G.; Bhat, K.N.H.; Shripathi, Acharya U.
Residue Number Systems (RNS) based on Chinese Remainder Theorem (CRT) permits the representation of large integers in terms of combinations of smaller ones. The set of all integers from 0 to M-1 with RNS representation and component wise modular addition and multiplication constitutes direct sum of smaller commutative rings. Encryption and decryption algorithm based on the properties of direct sum of smaller rings offers distinct advantages over decimal or fixed radix arithmetic. In this paper representation of integer using RNS, is successfully utilized in additive, multiplicative and affine stream cipher systems. The property of the cipher system based on RNS number system allow speeding up the encryption / decryption algorithm, reduce the time complexity and provides immunity to side channel, algebraic, and known plain text attacks. In this paper, the characteristics of additive, multiplicative and affine stream cipher systems, the key generation, and encryption and decryption based on RNS number system representation are discussed. �2010 IEEE.
Implementation of stream cipher system based on representation of integers in residue number system
(2010) Aithal, G.; Bhat, K.N.H.; Sripathi, U.
Residue Number Systems (RNS) based on Chinese Remainder Theorem (CRT) permits the representation of large integers in terms of combinations of smaller ones. The set of all integers from 0 to M-1 with RNS representation and component wise modular addition and multiplication constitutes direct sum of smaller commutative rings. Encryption and decryption algorithm based on the properties of direct sum of smaller rings offers distinct advantages over decimal or fixed radix arithmetic. In this paper representation of integer using RNS, is successfully utilized in additive, multiplicative and affine stream cipher systems. The property of the cipher system based on RNS number system allow speeding up the encryption / decryption algorithm, reduce the time complexity and provides immunity to side channel, algebraic, and known plain text attacks. In this paper, the characteristics of additive, multiplicative and affine stream cipher systems, the key generation, and encryption and decryption based on RNS number system representation are discussed. Â©2010 IEEE.
Surface modification of multi-directional forged biodegradable Mg-Zn alloy by ball burnishing process: Modeling and analysis using deep neural network
(Elsevier Ltd, 2021) Ramesh, S.; Anne, G.; Bhat, N.; Aithal, G.; Shivananda Nayaka, H.; Arya, S.
This research investigates the feasibility of improving surface integrity of the Mg-2%Zn alloy via a novel combined process of multidirectional forging (MDF) with ball burnishing technique. Mg-2%Zn alloy was subjected to multidirectional forging up to 5 passes at 280 °C and same sample is ball burnished with depth of press of 0.3 mm, feed of 300 mm/min and force of 250 N for 1 pass. Microstructure (optical and transmission electron microscope), phases (X ray diffraction), roughness (atomic force microscope) and mechanical properties (microhardness and tensile) were analyzed for cast, MDF processed and MDF + ball burnished samples. The study also defines a new reliability simulation framework to predict the roughness and hardness of the MDF + ball burnished samples using Deep Neural Network (DNN) approach. For the analysis, depth of press, feed and number of passes served as inputs for the DNN model. After configuring and training procedure of the model, the predicted roughness and microhardness of the MDF + ball burnished were compared with the results of experimental data. A large increase of microhardness was observed for MDF-5 + BB-1 (5 pass MDF processed Mg-2%Zn alloy + Ball burnished sample), found to be 98 Hv and surface roughness of 306 nm was achieved. According to the results, the obtained R-squared value is very close to the 99.5 percentage from the model for predicting roughness and hardness which is a promising result. Corrosion behavior of the AS-1, MDF-5 and MDF-5 + BB-1 was evaluated in Hank's balanced salt solution. Corrosion rate of the MDF-5 + BB-1 samples were found to be 0.87 mm/y which is 7 times better than that of AS-1 samples (6.10 mm/y). Grain refinement and residual stresses were higher in the MDF-5 + BB-1 sample, which helped significantly to enhance corrosion resistance. © 2021 The Society of Manufacturing Engineers