scholarly journals Assessing the effect size of users’ consciousness for computer networks vulnerability

2020 ◽  
Vol 12 (1) ◽  
pp. 14-29
Author(s):  
László Bognár ◽  
Antal Joós ◽  
Bálint Nagy
Keyword(s):  
Simple Model ◽  
Computer Networks ◽  
Simulation Study ◽  
Effect Size ◽  
Computer Network ◽  
Network Vulnerability ◽  
Cyber Attack ◽  
Approximate Probability ◽  
Set Up

AbstractIn this paper the conditions and the findings of a simulation study is presented for assessing the effect size of users’ consciousness to the computer network vulnerability in risky cyber attack situations at a certain business. First a simple model is set up to classify the groups of users according to their skills and awareness then probabilities are assigned to each class describing the likelihood of committing dangerous reactions in case of a cyber attack. To quantify the level of network vulnerability a metric developed in a former work is used. This metric shows the approximate probability of an infection at a given business with well specified parameters according to its location, the type of the attack, the protections used at the business etc. The findings mirror back the expected tendencies namely if the number of conscious user is on the

LEVERAGE: Reciprocal peer tutoring over broadband networks

ReCALL ◽  
1999 ◽  
Vol 11 (1) ◽  
pp. 133-142 ◽  
Author(s):  
Jan Wong ◽  
Agnès Fauverge
Keyword(s):  
Language Learning ◽  
Peer Tutoring ◽  
Computer Network ◽  
Web Based ◽  
Application Sharing ◽  
Quality Video ◽  
Reciprocal Peer Tutoring ◽  
Set Up ◽  
High Quality Video ◽  
Experimental Use

This paper reports on the experimental use of a broadband computer network hypermedia environment for language learning (French, English and Spanish). Using Web-based resources, students engage in a collaborative task over a network which offers high quality video-conferencing, application sharing and access to authentic multimedia resources. One of the main aims was to establish the practicalities of providing learners of languages with opportunities to engage in reciprocal peer tutoring. After outlining the pedagogical assumptions, and describing the set-up of the network-based learning environment, the trials are analysed, and the effectiveness of network-based language learning in supporting collaborative learning is discussed.

scholarly journals Simulation Studies as a Tool to Understand Bayes Factors

2021 ◽  
Vol 4 (1) ◽  
pp. 251524592097262
Author(s):  
Don van Ravenzwaaij ◽  
Alexander Etz
Keyword(s):  
Simulation Study ◽  
Prior Distribution ◽  
Bayes Factor ◽  
R Package ◽  
Bayes Factors ◽  
Simulation Studies ◽  
Social Scientists ◽  
Simple Simulation ◽  
Set Up

When social scientists wish to learn about an empirical phenomenon, they perform an experiment. When they wish to learn about a complex numerical phenomenon, they can perform a simulation study. The goal of this Tutorial is twofold. First, it introduces how to set up a simulation study using the relatively simple example of simulating from the prior. Second, it demonstrates how simulation can be used to learn about the Jeffreys-Zellner-Siow (JZS) Bayes factor, a currently popular implementation of the Bayes factor employed in the BayesFactor R package and freeware program JASP. Many technical expositions on Bayes factors exist, but these may be somewhat inaccessible to researchers who are not specialized in statistics. In a step-by-step approach, this Tutorial shows how a simple simulation script can be used to approximate the calculation of the Bayes factor. We explain how a researcher can write such a sampler to approximate Bayes factors in a few lines of code, what the logic is behind the Savage-Dickey method used to visualize Bayes factors, and what the practical differences are for different choices of the prior distribution used to calculate Bayes factors.

Network Security System Implementation Using Raspberry Pi-Based Random Port Knocking Sent Via Telegram

2018 ◽  
Vol 7 (2) ◽  
pp. 61-67
Author(s):  
Iga Revva Princiss Jeinever
Keyword(s):  
High Risk ◽  
Network Security ◽  
Computer Networks ◽  
Computer Network ◽  
Security System ◽  
Raspberry Pi ◽  
System Implementation ◽  
The Right ◽  
Network Administrators ◽  
Ip Block

Computer networks are basically not safe to access freely. Security gaps in the network can be seen by irresponsible people with various techniques. Opening a port for access carries a high risk of being attacked by an attacker. In this connection, network administrators are required to work more to be able to secure the computer network they manage. One form of network security that is often used by network administrators in server management is through remote login such as ports on telnet, SSH, etc. A port that is always open is a network security hole that can be used by people who are not responsible for logging into the server. Focusing on these problems, in this study, Random Port Knocking is the right way and can be used to increase network security. With Random Port Knocking, the port will be opened as needed, the port will automatically change when it fails to log in more than three times and IP will automatically be blocked and access will not continue so that attacks on the network can be avoided and network security stability can be further improved. The final result of this research shows that the method applied in this research makes server safe. Because port randomization and IP block make irresponsible parties try harder to penetrate firewall walls.

scholarly journals Cryptographic Key Management for Role-Based Access Control Model in Power System Computer Networks

2021 ◽  
Author(s):  
Celia J. Li
Keyword(s):  
Access Control ◽  
Power Systems ◽  
Power System ◽  
Computer Networks ◽  
Key Management ◽  
Computer Network ◽  
Role Based Access Control ◽  
Computationally Efficient ◽  
Efficient Operation ◽  
Role Based

This thesis research has successfully completed two developments: an efficient Power-system Role-based Access Control (PRAC) and a secure Power-system Role-based kEy management (PREM). The PRAC significantly increases the security of computer networks for power systems, and surmounts the challenges caused by typical security and reliability concerns due to current technological and political changes faced in the electricity power industry. The PREM is designed to support the efficient operation of the PRAC using one-way hash functions and utilizing their advantages of computationally efficient and irreversibility security. PRAC and PREM are not only developed for handling single local computer network domain, but also extended for supporting multiple computer network domains. A platform for the comprehensive assessment of PREM is established for the fast and economical assessment of the key management developed in this thesis research.

scholarly journals Cryptographic Key Management for Role-Based Access Control Model in Power System Computer Networks

2021 ◽  
Author(s):  
Celia J. Li
Keyword(s):  
Access Control ◽  
Power Systems ◽  
Power System ◽  
Computer Networks ◽  
Key Management ◽  
Computer Network ◽  
Role Based Access Control ◽  
Computationally Efficient ◽  
Efficient Operation ◽  
Role Based

This thesis research has successfully completed two developments: an efficient Power-system Role-based Access Control (PRAC) and a secure Power-system Role-based kEy management (PREM). The PRAC significantly increases the security of computer networks for power systems, and surmounts the challenges caused by typical security and reliability concerns due to current technological and political changes faced in the electricity power industry. The PREM is designed to support the efficient operation of the PRAC using one-way hash functions and utilizing their advantages of computationally efficient and irreversibility security. PRAC and PREM are not only developed for handling single local computer network domain, but also extended for supporting multiple computer network domains. A platform for the comprehensive assessment of PREM is established for the fast and economical assessment of the key management developed in this thesis research.

Spear Phishing

2019 ◽  
pp. 635-650
Author(s):  
Arun Vishwanath
Keyword(s):  
Computer Network ◽  
Relative Effectiveness ◽  
Social Science Research ◽  
Science Research ◽  
Cyber Attack ◽  
Policy Suggestions ◽  
Terrorist Groups ◽  
Use Of The Internet ◽  
Almost All ◽  
Gain Access

The ubiquitous use of the Internet has made it possible for terrorist groups to remotely foment attacks with little risk of capture. Among the newest forms of attacks is cyber hacking, which has seen increased use by terrorist groups for acts ranging from pinpointing targets for assassination to holding organisations hostage and embarrassing governments. In almost all these attacks, spear phishing is the vector used to gain access to a computer network – making it imperative that policymakers find ways to stop it. This chapter provides an overview of the different types of spear phishing attacks and the reasons they succeed. The chapter then provides an overview of the different strategies being used to combat it and their relative effectiveness. Drawing from the latest social science research and from initiatives that have worked around the world, the chapter culminates with six policy suggestions, which could significantly reduce the effectiveness of spear phishing and protect nations from a major cyber attack.

TCP/IP Protocol-Based Model for Increasing the Efficiency of Data Transfer in Computer Networks

2013 ◽  
pp. 116-134
Author(s):  
S.N. John ◽  
A.A. Anoprienko ◽  
C.U. Ndujiuba
Keyword(s):  
Simulation Model ◽  
Computer Networks ◽  
Computer Network ◽  
Data Transfer ◽  
Basic Method ◽  
Imitation Model ◽  
Corporate Networks ◽  
Network Applications ◽  
Modern Computer ◽  
Model And Simulation

This chapter provides solutions for increasing the efficiency of data transfer in modern computer network applications and computing network environments based on the TCP/IP protocol suite. In this work, an imitation model and simulation was used as the basic method in the research. A simulation model was developed for designing and analyzing the computer networks based on TCP/IP protocols suite which fully allows the exact features in realizing the protocols and their impact on increasing the efficiency of data transfer in local and corporate networks. The method of increasing efficiency in the performance of computer networks was offered, based on the TCP/IP protocols by perfection of the modes of data transfer in them. This allows an increased efficient usage of computer networks and network applications without additional expenditure on infrastructure of the network. Practically, the results obtained from this research enable significant increase in the performance efficiency of data transfer in the computer networks environment. An example is the “Donetsk National Technical University” network.

Game Theory for Network Security

Game Theory ◽  
2017 ◽  
pp. 369-382
Author(s):  
Sungwook Kim
Keyword(s):  
Game Theory ◽  
Network Security ◽  
Computer Networks ◽  
Computer Network ◽  
Government Agencies ◽  
Public And Private ◽  
Unauthorized Access ◽  
Access To Data

Network security consists of the provisions and policies adopted by a network administrator to prevent and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. It involves the authorization of access to data in a network, which is controlled by the network administrator. Usually, network security covers a variety of computer networks, both public and private, that are used in everyday jobs conducting transactions and communications among businesses, government agencies, and individuals. This chapter explores network security.

Designing Information Systems and Network Components for Situational Awareness

2012 ◽  
pp. 104-123
Author(s):  
Cyril Onwubiko
Keyword(s):  
Information Systems ◽  
Complex Networks ◽  
Computer Networks ◽  
Situational Awareness ◽  
Computer Network ◽  
Distributed Services ◽  
Network Applications ◽  
Systems Software ◽  
Design Requirements

Operators need situational awareness (SA) of their organisation’s computer networks and Information Systems in order to identify threats, estimate impact of attacks, evaluate risks, understand situations, and make sound decisions swiftly and accurately on what to protect against, and how to address incidents that may impact valued assets. Enterprise computer networks are often huge and complex, spanning across several WANs and supporting a number of distributed services. Understanding situations in such dynamic and complex networks is time-consuming and challenging. Operators SA are enhanced through a number of ways, one of which is through the use of situation-aware systems and technology. Designing situation-aware systems for computer network defence (CND) is difficult without understanding basic situational awareness design requirements of network applications and systems. Thus, this chapter investigates pertinent features that are foundation, essential, and beneficial for designing situation-aware systems, software, and network applications for CND.

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