Методичні основи оцінки контролю захищеності інформаційно-телекомунікаційної мережі спеціального призначення

Під час проведення антитерористичної операції йде пошук доцільних шляхів створення і вдосконалення науково обґрунтованої, економічно доцільної системи захисту інформаційних ресурсів в інформаційнотелекомунікаційних мережах спеціального призначення. Дана робота присвячена розгляду методичних основ оцінки контролю захищеності інформаційно-телекомунікаційних мереж спеціального призначення. Метою статті є підвищення захищеності інформаційно-телекомунікаційних мереж спеціального призначення за рахунок використання у якості базового методу аналізу ієрархій та апарату нейро-нечітких мереж для оцінки захищеності мереж даного класу. Наведена узагальнена характеристика основних груп методів оцінки контролю захищеності інформаційно-телекомунікаційних мереж даного класу. При постановці завдання оцінки контролю захищеності інформаційно-телекомунікаційних мереж спеціального призначення як системи інформаційних ресурсів визначаються її наступні показники: пріоритетність інформації, яка захищається, вірогідність злому, вартість системи захисту, продуктивність системи. Для завдання запропонованих параметрів оцінки захищеності системи можуть використовуватися методи дослідження, які включають теорії: графів, систем підтримки прийняття рішень, нечітких множин, нейронних мереж, методи багатокритеріальної оптимізації, експертні методи. Запропоновано використання у якості базового методу аналізу ієрархій та апарату нейро-нечітких мереж для подальшої розробки методу оцінки контролю захищеності інформаційно-телекомунікаційної мережі спеціального призначення

Seculation Routing With Fortification Wireless Networks

Wireless sensor networks having so many problems a number of solutios enough? security issues, discusses some existing solutions, and suggests possible research directions like key establishment secrecy,authentication,privacy,denial-of-service attacks ,secure routing  and node capture attacks. Sensor devices are limited in their energy, computation, and communication capabilities Sensor nodes are often deployed in open areas, thus allowing physical attack Sensor networks closely interact with their physical environments and with people, posing new security problems. So In this paper address all the problems of wireless senor networks .In this paper we control back bone flooding attacks and give the location privacy These techniques provide trade-offs between privacy, communication cost, and latency.Through analysis and simulation, we demonstrate that the proposed techniques are efficient and effective for source and sink location privacy in sensor networks

The Challenge In The Use Of New Technologies Integrated To Health In The Treatment Of Covid-19: A Brief Critical Analysis In Brazil

Viral diseases continue to emerge and annually bring challenges to the Brazilian public health system, such as COVID-19 with easy respiratory infection. This study aims to analyze the importance of new technologies in the treatment of COVID-19 and, thus, promote the information of technological data in the Brazilian territory. Therefore, methodological techniques were used in systematic reviews in the selection of included studies to be used in the construction of this short and critical systematic review. And 08 articles were included for inclusion in this critical analysis

The use of personalized medicine combined with artificial intelligence to monitor people with Covid-19

Since the emergence of the pandemic caused by the SARS-CoV-2 virus (coronavirus disease or COVID-19), the generalities since its emergence, from the clinical picture, as well as the findings observed in AI (Artificial Intelligence) diagnostic methods applied to medicine personalized. This article is a literature review regarding the use of personalized medicine combined with artificial intelligence to monitor people with covid-19. The continuous evolution of intelligent systems aims to provide better reasoning and more efficient use of collected data. This use is not restricted to retrospective interpretation, that is, to provide diagnostic conclusions. It can also be extended to prospective interpretation, providing an early prognosis. That said, physicians who could be assisted by these systems find themselves in the gap between the clinical case and in-depth technical analyses. What is missing is a clear starting point for approaching the world of machine learning in medicine

Truthful Mechanisms for Secure Communication in Wireless Cooperative System

To ensure security in data transmission is one of the most important issues for wireless relay networks, and physical layer security is an attractive alternative solution to address this issue. In this paper, we consider a cooperative network, consisting of one source node, one destination node, one eavesdropper node, and a number of relay nodes. Specifically, the source may select several relays to help forward the signal to the corresponding destination to achieve the best security performance. However, the relays may have the incentive not to report their true private channel information in order to get more chances to be selected and gain more payoff from the source. We propose a Vickey-Clark-Grove (VCG) based mechanism and an Arrow-d'Aspremont-Gerard-Varet (AGV) based mechanism into the investigated relay network to solve this cheating problem. In these two different mechanisms, we design different "transfer payment" functions to the payoff of each selected relay and prove that each relay gets its maximum (expected) payoff when it truthfully reveals its private channel information to the source. And then, an optimal secrecy rate of the network can be achieved. After discussing and comparing the VCG and AGV mechanisms, we prove that the AGV mechanism can achieve all of the basic qualifications (incentive compatibility, individual rationality and budget balance) for our system. Moreover, we discuss the optimal quantity of relays that the source node should select. Simulation results verify efficiency and fairness of the VCG and AGV mechanisms, and consolidate these conclusions.Comment: To appear in IEEE Transactions on Wireless Communication

Authentication in the use of health sensors to remote patients with covid-19: A proposal for the telehealth center in the EBSERH network

Viruses will continue to emerge and bring challenges to the global public health system with emerging viruses through respiratory contagion that cause pandemics. This study aims to propose a way to use constant monitoring during the period of treatment of the patient with COVID-19 and, thus, reduce the negative indicators of death in the Brazilian territory. Methodological techniques were used in meta-analysis and systematic reviews in the selection of included studies when used in the construction of this systematic review. 05 articles were selected for inclusion in this critical analysis

Network Coding based Information Security in Multi-hop Wireless Networks

Multi-hop Wireless Networks (MWNs) represent a class of networks where messages are forwarded through multiple hops of wireless transmission. Applications of this newly emerging communication paradigm include asset monitoring wireless sensor networks (WSNs), command communication mobile ad hoc networks (MANETs), community- or campus-wide wireless mesh networks (WMNs), etc. Information security is one of the major barriers to the wide-scale deployment of MWNs but has received little attention so far. On the one hand, due to the open wireless channels and multi-hop wireless transmissions, MWNs are vulnerable to various information security threats such as eavesdropping, data injection/modification, node compromising, traffic analysis, and flow tracing. On the other hand, the characteristics of MWNs including the vulnerability of intermediate network nodes, multi-path packet forwarding, and limited computing capability and storage capacity make the existing information security schemes designed for the conventional wired networks or single-hop wireless networks unsuitable for MWNs. Therefore, newly designed schemes are highly desired to meet the stringent security and performance requirements for the information security of MWNs. In this research, we focus on three fundamental information security issues in MWNs: efficient privacy preservation for source anonymity, which is critical to the information security of MWNs; the traffic explosion issue, which targets at preventing denial of service (DoS) and enhancing system availability; and the cooperative peer-to-peer information exchange issue, which is critical to quickly achieve maximum data availability if the base station is temporarily unavailable or the service of the base station is intermittent. We have made the following three major contributions. Firstly, we identify the severe threats of traffic analysis/flow tracing attacks to the information security in network coding enabled MWNs. To prevent these attacks and achieve source anonymity in MWNs, we propose a network coding based privacy-preserving scheme. The unique “mixing” feature of network coding is exploited in the proposed scheme to confuse adversaries from conducting advanced privacy attacks, such as time correlation, size correlation, and message content correlation. With homomorphic encryption functions, the proposed scheme can achieve both privacy preservation and data confidentiality, which are two critical information security requirements. Secondly, to prevent traffic explosion and at the same time achieve source unobservability in MWNs, we propose a network coding based privacy-preserving scheme, called SUNC (Source Unobservability using Network Coding). Network coding is utilized in the scheme to automatically absorb dummy messages at intermediate network nodes, and thus, traffic explosion induced denial of service (DoS) can be naturally prevented to ensure the system availability. In addition to ensuring system availability and achieving source unobservability, SUNC can also thwart internal adversaries. Thirdly, to enhance the data availability when a base station is temporarily unavailable or the service of the base station is intermittent, we propose a cooperative peer-to-peer information exchange scheme based on network coding. The proposed scheme can quickly accomplish optimal information exchange in terms of throughput and transmission delay. For each research issue, detailed simulation results in terms of computational overhead, transmission efficiency, and communication overhead, are given to demonstrate the efficacy and efficiency of the proposed solutions

Routing in anonymous networks as a means to prevent traffic analysis

Traditionally, traffic analysis is something that has been used to measure and keep track of a network's situation regarding network congestion, networking hardware failures, etc. However, largely due to commercial interests such as targeted advertisement, traffic analysis techniques can also be used to identify and track a single user's movements within the Internet. To counteract this perceived breach of privacy and anonymity, several counters have been developed over time, e.g. proxies used to obfuscate the true source of traffic, making it harder for others to pinpoint your location. Another approach has been the development of so called anonymous overlay networks, application-level virtual networks running on top of the physical IP network. The core concept is that by the way of encryption and obfuscation of traffic patterns, the users of such anonymous networks will gain anonymity and protection against traffic analysis techniques. In this master's thesis we will be taking a look at how message forwarding or packet routing in IP networks functions and how this is exploited in different analysis techniques to single out a visitor to a website or just someone with a message being forwarded through a network device used for traffic analysis. After that we will discuss some examples of anonymous overlay networks and see how well they protect their users from traffic analysis, and how do their respective models hold up against traffic analysis attacks from a malicious entity. Finally, we will present a case study about Tor network's popularity by running a Tor relay node and gathering information on how much data the relay transmits and from where does the traffic originate. CCS-concepts: - Security and privacy ~ Privacy protections - Networks ~ Overlay and other logical network structures - Information systems ~ Traffic analysi

Encaminhamento confiável e energeticamente eficiente para redes ad hoc

Doutoramento em InformáticaIn Mobile Ad hoc NETworks (MANETs), where cooperative behaviour is mandatory, there is a high probability for some nodes to become overloaded with packet forwarding operations in order to support neighbor data exchange. This altruistic behaviour leads to an unbalanced load in the network in terms of traffic and energy consumption. In such scenarios, mobile nodes can benefit from the use of energy efficient and traffic fitting routing protocol that better suits the limited battery capacity and throughput limitation of the network. This PhD work focuses on proposing energy efficient and load balanced routing protocols for ad hoc networks. Where most of the existing routing protocols simply consider the path length metric when choosing the best route between a source and a destination node, in our proposed mechanism, nodes are able to find several routes for each pair of source and destination nodes and select the best route according to energy and traffic parameters, effectively extending the lifespan of the network. Our results show that by applying this novel mechanism, current flat ad hoc routing protocols can achieve higher energy efficiency and load balancing. Also, due to the broadcast nature of the wireless channels in ad hoc networks, other technique such as Network Coding (NC) looks promising for energy efficiency. NC can reduce the number of transmissions, number of re-transmissions, and increase the data transfer rate that directly translates to energy efficiency. However, due to the need to access foreign nodes for coding and forwarding packets, NC needs a mitigation technique against unauthorized accesses and packet corruption. Therefore, we proposed different mechanisms for handling these security attacks by, in particular by serially concatenating codes to support reliability in ad hoc network. As a solution to this problem, we explored a new security framework that proposes an additional degree of protection against eavesdropping attackers based on using concatenated encoding. Therefore, malicious intermediate nodes will find it computationally intractable to decode the transitive packets. We also adopted another code that uses Luby Transform (LT) as a pre-coding code for NC. Primarily being designed for security applications, this code enables the sink nodes to recover corrupted packets even in the presence of byzantine attacks.Nas redes móveis ad hoc (MANETs), onde o comportamento cooperativo é obrigatório, existe uma elevada probabilidade de alguns nós ficarem sobrecarregados nas operações de encaminhamento de pacotes no apoio à troca de dados com nós vizinhos. Este comportamento altruísta leva a uma sobrecarga desequilibrada em termos de tráfego e de consumo de energia. Nestes cenários, os nós móveis poderão beneficiar do uso da eficiência energética e de protocolo de encaminhamento de tráfego que melhor se adapte à sua capacidade limitada da bateria e velocidade de processamento. Este trabalho de doutoramento centra-se em propor um uso eficiente da energia e protocolos de encaminhamento para balanceamento de carga nas redes ad hoc. Actualmente a maioria dos protocolos de encaminhamento existentes considera simplesmente a métrica da extensão do caminho, ou seja o número de nós, para a escolha da melhor rota entre fonte (S) e um nó de destino (D); no mecanismo aqui proposto os nós são capazes de encontrar várias rotas por cada par de nós de origem e destino e seleccionar o melhor caminho segundo a energia e parâmetros de tráfego, aumentando o tempo de vida útil da rede. Os nossos resultados mostram que pela aplicação deste novo mecanismo, os protocolos de encaminhamento ad hoc actuais podem alcançar uma maior eficiência energética e balanceamento de carga. Para além disso, devido à natureza de difusão dos canais sem fio em redes ad-hoc, outras técnicas, tais como a Codificação de Rede (NC), parecem ser também promissoras para a eficiência energética. NC pode reduzir o número de transmissões, e número de retransmissões e aumentar a taxa de transferência de dados traduzindo-se directamente na melhoria da eficiência energética. No entanto, devido ao acesso dos nós intermediários aos pacotes em trânsito e sua codificação, NC necessita de uma técnica que limite as acessos não autorizados e a corrupção dos pacotes. Explorou-se o mecanismo de forma a oferecer um novo método de segurança que propõe um grau adicional de protecção contra ataques e invasões. Por conseguinte, os nós intermediários mal-intencionados irão encontrar pacotes em trânsito computacionalmente intratáveis em termos de descodificação. Adoptou-se também outro código que usa Luby Transform (LT) como um código de précodificação no NC. Projectado inicialmente para aplicações de segurança, este código permite que os nós de destino recuperem pacotes corrompidos mesmo em presença de ataques bizantinos