1,101 research outputs found

    An integrated security Protocol communication scheme for Internet of Things using the Locator/ID Separation Protocol Network

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    Internet of Things communication is mainly based on a machine-to-machine pattern, where devices are globally addressed and identified. However, as the number of connected devices increase, the burdens on the network infrastructure increase as well. The major challenges are the size of the routing tables and the efficiency of the current routing protocols in the Internet backbone. To address these problems, an Internet Engineering Task Force (IETF) working group, along with the research group at Cisco, are still working on the Locator/ID Separation Protocol as a routing architecture that can provide new semantics for the IP addressing, to simplify routing operations and improve scalability in the future of the Internet such as the Internet of Things. Nonetheless, The Locator/ID Separation Protocol is still at an early stage of implementation and the security Protocol e.g. Internet Protocol Security (IPSec), in particular, is still in its infancy. Based on this, three scenarios were considered: Firstly, in the initial stage, each Locator/ID Separation Protocol-capable router needs to register with a Map-Server. This is known as the Registration Stage. Nevertheless, this stage is vulnerable to masquerading and content poisoning attacks. Secondly, the addresses resolving stage, in the Locator/ID Separation Protocol the Map Server (MS) accepts Map-Request from Ingress Tunnel Routers and Egress Tunnel Routers. These routers in trun look up the database and return the requested mapping to the endpoint user. However, this stage lacks data confidentiality and mutual authentication. Furthermore, the Locator/ID Separation Protocol limits the efficiency of the security protocol which works against redirecting the data or acting as fake routers. Thirdly, As a result of the vast increase in the different Internet of Things devices, the interconnected links between these devices increase vastly as well. Thus, the communication between the devices can be easily exposed to disclosures by attackers such as Man in the Middle Attacks (MitM) and Denial of Service Attack (DoS). This research provided a comprehensive study for Communication and Mobility in the Internet of Things as well as the taxonomy of different security protocols. It went on to investigate the security threats and vulnerabilities of Locator/ID Separation Protocol using X.805 framework standard. Then three Security protocols were provided to secure the exchanged transitions of communication in Locator/ID Separation Protocol. The first security protocol had been implemented to secure the Registration stage of Locator/ID separation using ID/Based cryptography method. The second security protocol was implemented to address the Resolving stage in the Locator/ID Separation Protocol between the Ingress Tunnel Router and Egress Tunnel Router using Challenge-Response authentication and Key Agreement technique. Where, the third security protocol had been proposed, analysed and evaluated for the Internet of Things communication devices. This protocol was based on the authentication and the group key agreement via using the El-Gamal concept. The developed protocols set an interface between each level of the phase to achieve security refinement architecture to Internet of Things based on Locator/ID Separation Protocol. These protocols were verified using Automated Validation Internet Security Protocol and Applications (AVISPA) which is a push button tool for the automated validation of security protocols and achieved results demonstrating that they do not have any security flaws. Finally, a performance analysis of security refinement protocol analysis and an evaluation were conducted using Contiki and Cooja simulation tool. The results of the performance analysis showed that the security refinement was highly scalable and the memory was quite efficient as it needed only 72 bytes of memory to store the keys in the Wireless Sensor Network (WSN) device

    Novel group handover mechanism for cooperative and coordinated mobile femtocells technology in railway environment

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    Recently, the Mobile Femto (MF) Technology has been debated in many research papers to be a promising solution that will dominate future networks. This small cell technology plays a major role in supporting and maintaining network connectivity, enhancing the communication service as well as user experience for passengers in High-Speed Trains (HSTs) environments. Within the railway environment, there are many MF Technologies placed on HSTs to enhance the train passengers’ internet experience. Those users are more affected by the high penetration loss, path loss, dropped signals, and the unnecessary number of Handovers (HOs). Therefore, it is more appropriate to serve those mobile users by the in-train femtocell technology than being connected to the outside Access Points (APs) or Base Stations (BSs). Hence, having a series of MFs (called Cooperative and Coordinated MFs -CCMF) installed inside the train carriages has been seen to be a promising solution for train environments and future networks. The CCMF Technologies establish Backhaul (BH) links with the serving mother BS (DeNB). However, one of the main drawbacks in such an environment is the frequent and unnecessary number of HO procedures for the MFs and train passengers. Thus, this paper proposes an efficient Group HO mechanism that will improve signal connection and mitigate the impact of a signal outage when train carriages move from one serving cell to another. Unlike most work that uses Fixed Femtocell (FF) architecture, this work uses MF architecture. The achieved results via Matlab simulator show that the proposed HO scheme has achieved less outage probability of 0.055 when the distance between the MF and mobile users is less than 10 m compared to the signal outage probability of the conventional HO scheme. More results have shown that the dropping calls probability has been reduced when mobile users are connected to the MF compared to the direct transmission from the eNB. That is in turn has have improved the call duration of mobile UEs and reduced the dropping calls probability for mobile users who are connected to the MF compared to eNB direct connection UEs

    Estimation of ransomware payments in Bitcoin ecosystem

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    Ransomware is one of the malicious software that is designed to prevent access to computer system until a sum of money is paid by the victim to the attacker. During the infection, the computer will either be locked, or the data will be encrypted. Ransoms are often demanded in Bitcoin, a largely anonymous Cryptocurrency. All transactions are recorded in the blockchain and verified by peer-to-peer networks. This paper investigation collects ten recent ransomware families, which use bitcoin as a payment for their ransom. In conjunction, we identified, collected and analysed Bitcoin addresses of users combining information from a clustering model and the blockchain. We used a heuristic clustering algorithm to reveal the hidden node's payment of ransomware. Finally, we demonstrated the characteristics of ransomware encryption mechanisms that include a view of the infected process and its execution, and the distinctive demands of ransom

    Cooperative and coordinated Mobile Femtocells technology in high-speed vehicular environments: mobility and interference management

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    In future networks, most users who will be accessing wireless broadband will be vehicular. Serving those users cost-effectively and improving their signal quality has been the main concern of many studies. Thus, the deployment of Mobile Femtocell (Mobile-Femto) technology on public transportation is seen to be one of the promising solutions. Mobile-Femto comes with its mobility and interference challenges. Therefore, eliminating the Vehicular Penetration Loss (VPL) and interference while improving signal quality and mobility for train passengers is the main concern of this paper. The initial system-level evaluation showed that the dedicated Mobile-Femto deployment has great potential in improving users’ experience inside public transportation. The Downlink (DL) results of the Proposed Interference Management Scheme (PIMS) showed significant improvement in Mobile-Femto User Equipment (UE) gains (up to 50%) without impacting the performance of macro UEs. In contrast, the Uplink (UL) results showed noticeable gains for both macro UEs and Mobile-Femto UEs

    Physical Properties, Chemical Composition And Nutritional Quality Of Two Cultivars Of Pigeon Pea (Cajanus Cajan L.) .

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    Physical properties, chemical composition and nulritional quality potentials of the seeds of Iwo cultivars of Cajanus cajan were stlldied. D!fferences between the t,vo cultivars were less pronounced except in their conterJls oj calcium, phosphorus, pl1ytic acid, lIYjJqin in{1ibitolY activity and g(utelins. :/n addUion, botl1 cultivars c;ontained valuable nutrie~1t:~amj food elu;rgy comparable to those of the :comlllon~v cons)lmed seed legumes. Presence of ta/1l1ins, phytie aGie/, m'alate, phenolics and tl)'Psininhibilors in the seeds may not constitute any problem in the utilization of the nutrients once the seeds are subjected to processing involving either heat treatment, soaking, dehu/ling and ge;'mination or their combination before consumption

    Responses of Broilers Fed Guineacorn/Palm Kernel Meal Based Ration to Supplemental Biotin

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    Seven duplicate floor pens with 20 day-old commercial broiler chicks each were fed a practical type broiler diet formulated with guineacorn/palm kernel meal and supplemented vvith graded levels of biotin WOO, 0'04, 0·08, 0'12, 0·16, 0·20 and 0·24 mg kg-1 feed) for a period of 6 weeks. Significantly poorer feed utilisation and carcass characteristics, higher blood lipid, lower blood glucose, lower pyruvate carboxylase activity in the liver, higher liver and kidney weights (% live weight), more lipid deposition in these organs coupled with more frequent incidences of foot dermatitis, higher mortality due to fatty liver and kidney syndrome (FLKS) and abnormal development of leg bone in broilers maintained on the diet without biotin supplementation indicated that they suffered vitamin deficiency. However, the responses of experimental birds indicated that a dietary supplement of 0·20 mg biotin kg - 1 feed was adequate for the promotion of good performance and prevention of dermal lesions, FLKS mortality and leg deformities .

    Processing Effects on the Chemical Composition and Nutritional Potential of the Pigeon Pea(cajanus Cajan L.)

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    The effects of processing on the chemical composition and nutritional potential of the seeds of Cajanus cajan have been estimated. Raw, soaked, cooked, and autoclaved seeds were analysed for proximate composition, calcium, magnesium •. ·phosphorus, manganese, iron, copper, structural carbohydrates, nutritive and non-nutritive matter and certain antinutritional factors (phytic acid, total oxalate, tannins, total phenolics and trypsin inhibitor activity). The results indicated that the caloric value of the seeds was improved by soaking, cooking and autoclaving, and that cooking and autoclaving ·significantly lowered the levels of antinutritional factors in the seed

    Studies on the Biotin Requirement of Broilers Fed Sunflower Seed Meal Based Diets

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    A total of 560 day-old commercial broiler chicks were used in two experiments conducted to 'investigate the biotin requirement of broilers fed sunflower seed meal (SSM) based diets. Two basal biotin-deficient diets based on dehulled (Experiment 1) and non-dehulled (Experiment 2) SSM were each supplemented with graded levels of biotin so that the rations had 40, 80, 120, 160, 200, 240 and 280 mcg/kg feed. Therefore a total of 14 treatments were tested. Each treatment was given to duplicate floor pens with 20 chicks eaoh for a period of 28 days. Estimation of the live weights, live weight gain, feed intake, blood glucose and free fatty acid concentrations, lipid contents and weights of liver and leidney, and liver pyruvate carboxylase activity and the records of incidence of dermal lesions, fatty liver and kidney syndrome (FLKS) mortality and leg deformities indicated that in the case of dehulled SSM, dietary biotin of of 160 mcg/kg feed waS'" marginal while at least 200 mcglkg appeared to be needed for optimum performance of the birds. When non-dehulled SSM was incorporated in the diet, 200 mcg biotin1k:g feed was found to be the lowest dietary level needed. However, as it seems that better "results could be obtained with higher levels, 240 mcg biotin1k:g with non-dehulled SSM is being recommended
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