PPT-Computer Network Security

Dr X Derived from slides by Prof William Enck NCSU Outline Network Attacks Command Line Lab OSI stack Networking Fundamentally about transmitting information between two devices Communication . Fifth Edition. by William Stallings. Chapter 1. Introduction. The combination of space, time, and strength that must be considered as the basic elements of this theory of defense makes this a fairly complicated matter. Consequently, it is not easy to find a fixed point of departure.. William Stallings, 6. th. Ed. . Chapter 1. Overview. . “The combination of space, time, and strength that must be considered as the basic elements of this theory of defense makes this a fairly complicated matter. Consequently, it is not easy to find a fixed point of departure.”. Network Security. Chapter #1 in the text book ( Stallings). Introduction to Computer and Network Security. Computer security concepts. The OSI security architecture. Security attacks. Security services. Professor Sushil Jajodia. Center for Secure Information Systems. jajodia@gmu.edu. http://. csis.gmu.edu/jajodia. . Outline. Problem. Approach. Benefits. Challenges. The Perfect Storm. Network configurations are ever more sophisticated. AND . WAYS TO PREVENT HACKING. WHAT IS HACKING ?. Hacking is unauthorized use of computer and network resources. . The term "hacker" originally meant a very gifted programmer. In recent years though, with easier access to multiple systems, it now has negative implications.. aka . CyberSecurity. Monitor and manage security risks at the network level for the entire Johns Hopkins Network.. Everyone & Everything is Connected. Radio – 35 years to reach 50 million . TV – 15 years to reach 50 million. &. CYBER LAWS . By. R K BAGGA. 2. “ 60% of networks are penetrated over 30 times a year ”. “ . On average, every site newly installed on the Web will be accessed within 28 seconds and attacked within 5 hours. Spyware and Adware . Spyware . Software that secretly gathers information about users while they browse the Web. Can be used maliciously. Install antivirus or antispyware software. Adware . Form of spyware . you . will learn . about different types of security . threats . and . how to reduce your risk. Also privacy issues that are relevant to security will be discussed.. Test. You get a file attachment in a message, from which of the following people would should you accept it and why?. A computer system . uses a number of different ways to protect the system:. Your credentials (e.g. username and password). Your authorisation (e.g. . drwxr. -x-r--). Your location (e.g. inside/outside the LAN). Operating. System. Process. Manager. Memory. Manager. Network. Manager. Device. Manager. File. Manager. Operating. System. Process. Manager. Memory. Manager. Network. Manager. Device. Manager. Security. Also privacy issues that are relevant to security may be discussed.. Security Is Big News. https://www.theregister.co.uk/security/. https://catless.ncl.ac.uk/Risks/. https://krebsonsecurity.com/. https://www.ctvnews.ca/canada/credit-card-skimmers-found-at-vancouver-transit-stations-1.4010396. Computer Security In this section you will learn about different types of security threats and how to reduce your risk. Also privacy issues that are relevant to security will be discussed. Test Alice . Wiesbaum. Federal Office . for the Safety of Nuclear Waste . Management. , . Germany. International Conference on Nuclear Security: Sustaining and Strengthening Efforts (ICONS 2020. ). xx.02.2020, IAEA Headquarters, Vienna.