Abstract

Mobile cloud computing (MCC) allows mobile users to have on-demand access to cloud services. A mobile cloud model helps in analyzing the information regarding the patients' records and also in extracting recommendations in healthcare applications. In MCC, a fine-grained level access control of multiserver cloud data is a prerequisite for successful execution of end-users applications. In this paper, we propose a new scheme that provides a combined approach of fine-grained access control over cloud-based multiserver data along with a provably secure mobile user authentication mechanism for the Healthcare Industry 4.0. To the best of our knowledge, the proposed scheme is the first to pursue fine-grained data access control over multiple cloud servers in a MCC environment. The proposed scheme has been validated extensively in different heterogeneous environment where its performance was found good in comparison to other existing schemes.

Abstract

We have applied PLSR on NIRS data of Sorghum to select significant wavelengths for Crude-Protein content. Calibration models proposed using single wavelength (1449nm) and a pair (1485nm and 1486nm) give the coefficient of determination (R 2 ) as 0.7928 and 0.8334 respectively.

Abstract

Security and privacy are the major concerns in cloud computing as users have limited access on the stored data at the remote locations managed by different service providers.These become more challenging especially for the data generated from the wearable devices as it is highly sensitive and heterogeneous in nature. Most of the existing techniques reported in the literature are having high computation and communication costs and are vulnerable to various known attacks, which reduce their importance for applicability in real-world environment. Hence, in this paper, we propose a new cloud based user authentication scheme for secure authentication of medical data. After successful mutual authentication between a user and wearable sensor node, both establish a secret session key that is used for future secure communications. The extensively-used Real-Or-Random (ROR) model based formal security analysis and the broadly-accepted Automated Validation of Internet Security Protocols and Applications (AVISPA) tool based formal security verification show that the proposed scheme provides the session-key security and protects active attacks. Theproposed scheme is also informally analyzed to show its resilience against other known attacks. Moreover, we have done a detailed comparative analysis for the communication and computation costs along with security and functionality features which proves its efficiency in comparison to the other existing schemes of its category.

Abstract

We have analysed the effect of beam wander, jitter and boresight on the deviation of centroid of laser beam. It is seen to be wandering over a restricted range, though off the center of detector.

Abstract

Water crisis is a major issue across various cities in the world. In recent times, a considerable amount of work has been done on remote monitoring using water flow sensors. In almost all these applications either GSM/GPRS or Zig-Bee has been used for communication. In this work, we propose a resilient water monitoring system using a low power Wi-Fi module. The goal is achieved in three stages: calibration of flow sensor, design of robust IoT node with embedded power management and packaging of the complete system. The aim of calibration is to enhance the linearity range by choosing a suitable meter constant K for the turbine flow sensor. It helps to make the system adaptive to variations in pressure and flow rate. The sensor data is processed and sent to the cloud using power efficient ESP8266 Wi-Fi SoC chip. The packaging of the complete system is done to make it watertight and suitable for usage in …

Abstract

This paper utilizes RF Sensing to develop a facile methodology for the determination of Critical Micelle Concentration (CMC) of surfactants. The study is undertaken with the help of an Interdigitated Capacitor based RF Sensor. Due to change in permittivity, the sensor yields distinct resonant frequencies when introduced to solutions of varying concentration of Sodium Dodecyl Sulphate as the electrolyte. As the surfactant approaches micellization, the resonant frequency shift drastically alters, and this sudden transition is used to determine the value of CMC. The proposed technique estimates the CMC of SDS to be 6.5 x10 -3 M The introduced method is effective and less cumbersome as compared to traditional techniques.

Abstract

Research has proven that accomplishing security properties while improving performance of an authentication protocol is a challenging task. Numerous authentication protocols proposed in the recent times are still behind in achieving the concrete objectives. Qi et al. and Lu et al. recently proposed two-factor authenticated key-agreement protocols for client–server architecture. This paper revisits their protocols and analyzes the shortcomings of such approaches. We also propose an improved authenticated key agreement protocol for client–server environment to defeat mentioned weaknesses of existing protocols that are discussed in related works. The rigorous security analysis using Burrows–Abadi–Needham logic, formal security verification using Real-OR-Random model, simulations using the Automated Validation of Internet Security Protocols and Applications tool, and the informal security analysis shows that the proposed protocol is secure. Additionally, we summarize the results to ensure that the proposed protocol is efficient compared to the existing related protocols.

Abstract

The purpose of this research is to explore the possibilities and mechanisms to be followed in order to extend the QoS in the backbone networks. This paper extends the ideas discussed in my previous paper: A Novel Architecture to Enhance Quality of Service in IP Networks [1] explaining the consequences of the proposal and building a model network. Simulated an SDN network using mininet and presented the packet captures depicting the extension of QoS outside the access networks.

Abstract

Authentication schemes are widely used mechanisms to thwart unauthorized access of resources over insecure networks.Several smart card based password authentication schemes have been proposed in the literature. In this paper, we demonstrate the security limitations of a recently proposed password based authentication scheme, and show that their scheme is still vulnerable to forgery and offline password guessing attacks and it is also unable to provide user anonymity, forward secrecy and mutual authentication. With the intention of fixing the weaknesses of that scheme, we present a secure authentication scheme. We show that the proposed scheme is invulnerable to various attacks together with attacks observed in the analyzed scheme through both rigorous formal and informal security analysis. Furthermore, the security analysis using the widely-accepted Real-Or-Random (ROR) model ensures that the proposed scheme provides the session key (SK) security. Finally,we carry out the performance evaluation of the proposed scheme and other related schemes, and the result favors that the proposed scheme provides better trade-off among security and performance as compared to other existing related schemes.

Abstract

In a synchronous distributed network of n nodes, the goal of a Secure Message Transmission (SMT) protocol is to securely deliver the sender’s message at the receiver’s end in the presence of a computationally unbounded adversary that can partially control the network by corrupting some of its nodes (except the sender and the receiver). In a network modelled as a directed graph, to achieve unconditional security tolerating tb Byzantine faults, it is known that: (1) if all the paths are one-way connected from the sender to the receiver – called as forward channels – then 2tb + 1 vertex-disjoint forward channels are necessary and sufficient (2) for 1 ≤ u ≤ tb, if there exist 2tb + 1 − u vertex-disjoint forward channels then u vertex-disjoint paths from the receiver to the sender – known as feedback channels – are necessary and sufficient. Moreover, similar characterization exists for tolerating mixed faults – up to t f fail-stop faults in addition to tp passive faults. We notice that these results characterized the networks by studying the required number of extra vertex-disjoint feedback channels, conditioned on the existence of a certain number of forward channels. In this work, we give a generic characterization without attaching any such if condition. Specifically, we answer the following questions. In a given directed graph, that is abstracted as a collection of strong paths from S to R and R to S, under what conditions is SMT (im)possible tolerating: (1) up to tp passive faults?, (2) mixed faults – up to t f fail-stop faults in addition to tp passive faults?, and (3) up to tb Byzantine faults? Also, for each of these three problems, we explicitly show that there are networks in which SMT protocols exist whereas the existing results do not characterize such networks.