Security concepts

This document discusses the importance of security for computers and networks. It identifies common security threats both internal and external, such as employees, hackers, viruses, worms, and social engineering. The document also outlines different types of attacks including physical theft or damage of equipment, data theft or corruption, and various forms of malware like adware, spyware, phishing, trojans, and rootkits. Finally, it recommends security procedures like creating strong passwords, developing security policies, and maintaining up-to-date software and antivirus protection.

This document discusses various topics related to computer security including risks, attacks, safeguards, and ethics. It describes common security threats like viruses, hacking, denial of service attacks, and information theft. It also outlines methods to identify users, protect against threats, and investigate security incidents through digital forensics. Safeguards include firewalls, antivirus software, encryption, and physical access controls.

Security involves protecting computer resources from unauthorized access and natural disasters. It defines users' rights to keep personal data private. Most data damage is caused by errors and omissions, so organizations need accurate data for transactions, services, and decisions. Proper security controls are needed to prevent dishonest programmers from easily modifying software or stealing data. Security also addresses risks from misuse of computer resources, fires, floods and other natural disasters.

This document discusses computer security risks. It defines computer security risks as events that could cause loss or damage to computer systems. It then identifies and describes various types of security risks like internet and network attacks (e.g. malware, botnets, denial of service attacks), unauthorized access, hardware and software theft, information theft, and system failures. Specific malware types are also defined, including viruses, worms, Trojan horses, rootkits, and spyware.

Computer security threats & prevention,Its a proper introduction about computer security and threats and prevention with reference. Have info about threats and their prevention.

F. Questier, Computer security, workshop for Lib@web international training program 'Management of Electronic Information and Digital Libraries', university of Antwerp, October 2015

This document discusses various computer security risks and precautions users can take. It defines different types of threats like hackers, crackers, and cybercriminals. It also explains different attacks like cyberterrorism and how viruses can spread. The document recommends precautions like not opening unexpected email attachments, using antivirus software, and updating signatures regularly to help safeguard against malware infections.

The document discusses the importance of computer and network security for future computer technicians. It states that failure to implement proper security procedures can put private information, company secrets, financial data, computer equipment, and items of national security at risk. The document outlines some of a technician's primary responsibilities, which include configuring network settings to keep the network secure, applying software updates, and instructing users on good security practices. It also describes different types of security threats like physical attacks, data attacks, internal threats from employees, and external threats from unauthorized users.

A computer virus attaches to code or files and spreads when the infected software runs or is transferred. A worm replicates itself across a network without needing to be attached to other programs. A Trojan horse appears benign but hides malicious code. Security procedures include plans to respond to threats, updating for new risks, and testing weaknesses. Antivirus software detects and removes viruses, worms and Trojans, requiring frequent updates. Encryption, firewalls, and port protection help secure data and traffic entering computers.

Little analist about risk and threatens when you work with computer. And some tricks to make strong passwords.

This document discusses basic security concepts, including definitions of security, assets, and the principle of easiest penetration. It describes three classifications of protection: prevention, detection, and reaction. Examples are given for physical and cyber security. The goals of security are defined as integrity, confidentiality, and availability. Common security threats are interruption, interception, modification, and fabrication. Vulnerabilities in computing systems can occur in data, software, hardware, and exposed assets. Methods of defense include encryption, software/hardware controls, policies, and physical controls. System access control and data access control are important methods for making systems secure using identification, authentication, and access authorization.

It refers to protection of a computer and the information stored in it, from the unauthorised users. Computer security is a branch of computer technology known as information security as applied to computers and networks. 

This document discusses computer security risks and safeguards. It describes various types of cybercriminals like hackers, crackers, and corporate spies. It also outlines different internet and network attacks such as viruses, worms, Trojan horses, and denial of service attacks. Finally, it provides tips to prevent unauthorized access through techniques like installing antivirus software, updating definitions, and inoculating program files. The overall document aims to define computer security risks and describe methods to protect against internet attacks, unauthorized access, and information theft.

This document summarizes computer and network security threats. It discusses key security objectives of confidentiality, integrity and availability. It describes common security threats to hardware, software, data, and communication lines/networks. Examples of threats include theft, damage, alteration, and denial of service attacks. Different classes of intruders like masqueraders and misfeasors are also outlined. Common intrusion techniques and types of malicious software like viruses, worms, trojans and backdoors are defined. The document provides details on various goals and behaviors of attackers.

This document is a project report submitted by Deeptika Soni on threats to computers. It discusses various types of threats like viruses, worms, hackers and their symptoms. It outlines system requirements and provides an index with sections on virus components, how threats are noticed, suggestions to prevent threats, and conclusions. The report references hardware and software vulnerabilities that can be exploited by interceptions, interruptions, modifications and fabrications. It notes threats involve theft, destruction or unauthorized access and tampering with computer assets.

The document discusses various topics related to computer security including definitions of computer security, cyber security, and IT security. It defines key concepts like confidentiality, integrity, and availability. It also defines common security threats like unauthorized access, hackers, vulnerabilities, and attacks. It discusses security measures like antivirus software, firewalls, and provides examples of computer crimes and viruses.

The document discusses system security and defines key related terms. System security is the ability of a system to protect itself from accidental or deliberate attacks. It is essential for availability, reliability, and safety as most systems are networked. Without proper security, systems are vulnerable to damage like denial of service, data corruption, and disclosure of confidential information. Security can be achieved through strategies such as avoiding vulnerabilities, detecting and eliminating attacks, and limiting exposure and enabling recovery from successful attacks.

This document provides an overview of computer and web security concepts that will be covered in an IT security course. The course will cover topics such as encryption, digital signatures, firewalls, viruses, and access control methods. It defines computer security as protecting systems from threats to preserve confidentiality, integrity and availability of information and resources. It discusses the need for security due to increasing computer crimes, vulnerabilities, and risks from networks and systems being interconnected. Common security requirements like secrecy, integrity, authenticity, availability and access control are also introduced.

This document discusses various concepts related to network security. It covers topics such as understanding security costs, securing data both physically and virtually, planning network security strategies, and features of Windows operating systems that improve security such as Kerberos authentication, public key infrastructure (PKI), group policy, VPNs, and IPSec. It also discusses security tools and methods like firewalls, intrusion detection systems, honeypots, and how to protect against malicious code like viruses, Trojan horses, and worms.

The document discusses security concepts in SAP BusinessObjects (BO) Xi 3.x. It provides an overview of new features in BO Xi 3.x security including more granular rights that can be applied at the content level and folder level. It also notes challenges in migrating to or implementing the new security model such as understanding the new concepts and redesigning security models while limiting administration tasks.

CompTIA exam study guide presentations by instructor Brian Ferrill, PACE-IT (Progressive, Accelerated Certifications for Employment in Information Technology) "Funded by the Department of Labor, Employment and Training Administration, Grant #TC-23745-12-60-A-53" Learn more about the PACE-IT Online program: www.edcc.edu/pace-it

CompTIA exam study guide presentations by instructor Brian Ferrill, PACE-IT (Progressive, Accelerated Certifications for Employment in Information Technology) "Funded by the Department of Labor, Employment and Training Administration, Grant #TC-23745-12-60-A-53" Learn more about the PACE-IT Online program: www.edcc.edu/pace-it

CompTIA exam study guide presentations by instructor Brian Ferrill, PACE-IT (Progressive, Accelerated Certifications for Employment in Information Technology) "Funded by the Department of Labor, Employment and Training Administration, Grant #TC-23745-12-60-A-53" Learn more about the PACE-IT Online program: www.edcc.edu/pace-it

CompTIA exam study guide presentations by instructor Brian Ferrill, PACE-IT (Progressive, Accelerated Certifications for Employment in Information Technology) "Funded by the Department of Labor, Employment and Training Administration, Grant #TC-23745-12-60-A-53" Learn more about the PACE-IT Online program: www.edcc.edu/pace-it

Information Security Management. Introduction. By Yuliana Martirosyan, Based on Bell G. Reggard, Information Security Management. Concepts and Practices.

This document summarizes network concepts based on a Cisco book. It discusses how PCs communicate, network devices like hubs and switches, IP and MAC addressing, the OSI model and its seven layers, network segmentation using bridges routers and gateways, Ethernet operations, and concepts like cut-through forwarding, interframe gap, carrier signals, and CSMA/CD. The document is presented as a review of key topics in networking and internetworking.

This document provides an overview of basic network and security concepts. It discusses TCP/IP, routing, DNS, NAT, firewalls, tunneling, and DMZs. It also covers web and security concepts such as proxies, reverse proxies, HTTP/HTTPS, and certificates. The document defines these terms and concepts at a high level to provide foundational understanding of computer networks and security.

This document provides basic instructions for setting up and troubleshooting a simple computer network for file sharing. It explains that computers connect to an Ethernet switch via network adapters and have IP addresses to communicate. It describes how to check the IP address and default gateway using the ipconfig command on Windows, and how to test the connection by pinging the default gateway. Finally, it lists some basic troubleshooting steps like verifying the physical connection and IP address, checking which applications are working, and how to check proxy settings in Internet Explorer.

This seminar discusses the evolution of mobile network generations from 1G to 5G. 5G is expected to offer speeds up to 1 Gbps, making it 10 times faster than previous generations. It will allow for complete wireless communication with almost no limitations. The key concepts of 5G include a real wireless world with no access or zone issues, the ability to simultaneously connect to multiple wireless technologies, smart radios, and IPv6 addressing. 5G will use technologies like ultra wide band networks, smart antennas, and code division multiple access. It is being designed as an open platform across network layers to provide the best quality of service at the lowest cost.

While computer systems today have some of the best security systems ever, they are more vulnerable than ever before. This vulnerability stems from the world-wide access to computer systems via the Internet. Computer and network security comes in many forms, including encryption algorithms, access to facilities, digital signatures, and using fingerprints and face scans as passwords.

The document discusses different types of computer network topologies. It defines network topology as the physical configuration of cables, computers, and other devices on a network. The key network topologies covered are bus, ring, star, and mesh. Advantages and disadvantages of each topology are summarized.

The intention of this slide is to cover all the basics in Mobile Security in Cyber and Information Security (Network and Communication Security)

A computer network is defined as the interconnection of two or more computers. It is done to enable the computers to communicate and share available resources. Components of computer network Network benefits Disadvantages of computer network Classification by their geographical area Network classification by their component role Types of servers

In shared PPT we have discussed about different types of cyber security attacks how it works and how we can prevent it .

Gerald Z. Villorente presents on the topic of web security. He discusses security levels including server, network, application, and user levels. Some common web application threats are also outlined such as cross-site scripting, SQL injection, and denial-of-service attacks. The presentation provides an overview of aspects of data security, principles of secure development, and best practices for web security.

A penetration test involves four main phases: reconnaissance, scanning, exploitation, and maintaining access. In the reconnaissance phase, tools are used to gather information about the target system without authorization. Scanning identifies open ports and vulnerabilities. Exploitation attempts to gain unauthorized control of systems by exploiting vulnerabilities, such as using password crackers. Maintaining access involves creating backdoors for future unauthorized access, such as using network sniffing tools or installing rootkits. Popular tools used in penetration tests include Nmap for scanning, Metasploit for exploitation, and Netcat for creating backdoors. Defending against penetration tests requires monitoring information published online, properly configuring firewalls and access controls, patching systems, and using antivirus and intrusion detection software

This document discusses distributed denial of service (DDoS) attacks. It begins with an introduction that defines DDoS attacks as attempts to make an online service unavailable by overwhelming it with traffic from multiple compromised sources. The document then covers the basics of DDoS attacks, common symptoms, how they work by exploiting vulnerabilities in systems to create botnets for launching attacks, and various methods like ICMP floods and SYN floods. It also discusses ways to handle DDoS attacks through defenses like firewalls, switches, and routers. The document concludes with preventative and reactive defense mechanisms to detect and respond to attacks.

The document summarizes a presentation on network security and Linux security. The presentation covered introduction to security, computer security, and network security. It discussed why security is needed, who is vulnerable, common security attacks like dictionary attacks, denial of service attacks, TCP attacks, and packet sniffing. It also covered Linux security topics like securing the Linux kernel, file and filesystem permissions, password security, and network security using firewalls, IPSEC, and intrusion detection systems. The presentation concluded with a reference to an ID-CERT cybercrime report and a call for questions.

The document discusses various types of malware attacks including DDoS attacks, botnets, and mitigations. It provides definitions and examples of different malware types such as viruses, worms, Trojan horses, rootkits, logic bombs, and ransomware. It also discusses how botnets are used to launch DDoS attacks and describes common DDoS attack countermeasures such as preventing initial hacks, using firewalls, and changing targeted IP addresses.

This document discusses network security. It covers security attacks like interruption, interception, modification and fabrication. It also discusses security services like confidentiality, integrity and availability. The document outlines common security mechanisms like encryption, software/hardware controls and firewalls. It provides examples of security attacks like denial of service, TCP hijacking and how mechanisms like firewalls, intrusion detection systems and IPSec can provide defenses.

This document discusses various computer network attacks and vulnerabilities. It covers topics like ransomware, IoT attacks, social engineering, man-in-the-middle attacks, denial of service attacks, distributed denial of service attacks, SQL injection, SSL stripping, URL misinterpretation, directory browsing, input validation vulnerabilities, and vulnerabilities in each layer of the OSI model. The goal is to provide an overview of common network attacks and how they can be carried out.

This document discusses various types of network security attacks and methods to prevent them. It covers physical access attacks, social engineering attacks, penetration attacks like scanning and malware. It also discusses attacks on the OSI and TCP/IP models like at the session, transport and network layers. Prevention methods covered include firewalls, proxies, IPSec, security policies and hardening hosts. Specific switch and router vulnerabilities are examined like ARP poisoning, SNMP, spanning tree attacks. Countermeasures for switches include BPDU guard, root guard.

The document discusses various tools and methods used in cybercrime, including proxy servers, anonymizers, phishing, password cracking, keyloggers, viruses, worms, Trojan horses, backdoors, steganography, denial of service attacks, SQL injection, and buffer overflows. It provides details on how each method works and how attackers use them to launch cyber attacks. The document also outlines the basic stages of a cyber attack, from initial reconnaissance to covering tracks.

This Presentation covers details and demonstration of 2 Network Layer and 2 Application Layer Attacks: -DNS Cache Poisoning Attack -ICMP Flooding Attack (Volumetric Dos) - SQL Injection Attack -XML External Entity Attack

This document discusses advanced persistent threats (APTs) and strategies for cyber defense. It describes APTs as advanced, persistent, and threatening adversaries that are formally tasked to accomplish missions. The document outlines the lifecycle of APT attacks, including establishing backdoors in networks, maintaining long-term control, and exfiltrating data using encryption. It provides examples of APT groups and tools they use, such as exploiting vulnerabilities to escalate privileges and dump cached credentials from Windows networks. The overall summary is that APTs are dangerous, organized adversaries requiring persistent cyber defense strategies.

1. Network probes scan computer networks to gather information about services and vulnerabilities which can enable future attacks. 2. Privilege escalation attacks exploit software bugs to gain higher levels of access on a system, such as ordinary users accessing root privileges. 3. Denial of service (DoS) and distributed denial of service (DDoS) attacks aim to overwhelm network or system resources to interfere with normal operations.

This document discusses cyber security threats and recommendations for addressing them. It begins with an overview of the history of threats like Melissa in 1999 and Slammer in 2003. Today's threats are described as persistent, sophisticated, and targeted. The document then outlines the anatomy of a common attack involving phishing emails, drive-by downloads, gaining access to internal networks, and exfiltrating data. It recommends building a strong security foundation with controls and guidelines, developing an incident response plan, and establishing partnerships for assistance in responding to incidents.

BackTrack is a Linux distribution focused on penetration testing with over 300 security tools. It allows testing of vulnerabilities like buffer overflows and cross-site scripting through tools like Nmap, Nikto, and Metasploit. Common attack techniques explored include man-in-the-middle attacks using ARP poisoning, password cracking through tools like John the Ripper, and "Google hacking" to find sensitive information online.

BackTrack is a Linux distribution focused on penetration testing with over 300 security tools. It allows testing of vulnerabilities like buffer overflows and cross-site scripting through tools like Nmap, Nikto, and Metasploit. Common attack techniques explored include man-in-the-middle attacks using ARP poisoning, password cracking through tools like John the Ripper, and hacking web servers through techniques like Google hacking.

BackTrack is a Linux distribution focused on penetration testing with over 300 security tools. It allows testing of vulnerabilities like buffer overflows and cross-site scripting through tools like Nmap, Nikto, and Metasploit. Attackers can use these tools along with techniques like ARP poisoning to conduct remote exploits or hack passwords on Windows systems.

This document provides a summary of techniques to secure network infrastructure. It discusses protecting devices through secure access controls, filtering infrastructure to permit only required protocols, securing routing protocols through authentication and prefix filtering, securing MPLS through design rules and ACLs, and securing DNS through techniques like DNSSEC to prevent cache poisoning and unauthorized updates. The document outlines common attacks like spoofing, hijacking, and denial of service and recommends mitigation strategies across the network, routing, and application layers.

This document provides an overview of operating system security. It discusses various security threats like program threats (e.g. viruses, Trojan horses), system and network threats (e.g. port scanning, denial of service attacks). It also covers cryptography as a security tool for encryption and authentication. Security measures need to be implemented at multiple levels - physical, human, operating system and network levels. Cryptography establishes secure communication over insecure mediums using encryption algorithms that encrypt messages using keys. Symmetric encryption uses the same key for encryption and decryption.

Unauthorized access to computer systems and networks can occur through various means such as hacking tools, social engineering, or exploiting system vulnerabilities. Network scanning tools can be used for both legitimate and illegitimate purposes to identify active systems and open ports. Various attacks exist such as man-in-the-middle, ARP poisoning, and wireless network hacking. Protecting against unauthorized access requires monitoring for anomalies, using tools like firewalls, regularly backing up data, and educating users.

The document discusses new tokens added to Dell Command Configure (DCC) 3.1 to control various components in stealth mode. It provides details on getting and setting the value of each token using DCC CLI commands and lists the supported line of business and platforms. Some of the new tokens discussed include Bluetoothstealthmode, fanstealthmode, gpsstealthmode, lcdstealthmode, and others to control components like Bluetooth, fans, GPS, LCD screen in stealth mode.

Dell Command Monitor 9.1 supports configuration of several new BIOS tokens related to system behavior and components. These include settings for extending POST time, controlling wireless activity LEDs, enabling Intel Ready Mode Technology, configuring keyboard backlight colors, setting primary video device slots, enabling/disabling docking station ports, and adjusting various settings for stealth/quiet mode. The document provides details on each new token, including possible values and WMIC commands to check/set the token values.

This document provides an introduction to Powershell and the Dell Command | Powershell Provider (DCPP). It discusses the history and versions of Powershell, how to get help and use the Integrated Scripting Environment. It also covers the basics of Powershell cmdlet structure and aliases. The document then introduces DCPP, which can be used to configure BIOS settings on Dell devices, and provides instructions for installing DCPP either from a zip file or using the Powershell Gallery.

Dell Command Monitor 9.0 adds support for new BIOS tokens that control various hardware features such as cameras, USB ports, wireless radios, and fan speeds on Dell laptops and desktops. The document provides details on each new token, including the command lines to check the current setting and enable or disable the feature.