Networking and Internet Security Attacks PDF

Networking and the Internet Security (Forms of Attacks) Dr. M. Tanvir Afzal  Security (Forms of Attacks) Attacks Computer Systems and its contents can be attacked by many ways Many of these incorporates the...

Networking and the Internet Security (Forms of Attacks) Dr. M. Tanvir Afzal  Security (Forms of Attacks) Attacks Computer Systems and its contents can be attacked by many ways Many of these incorporates the Malicious Software (Malware) 2  Security (Forms of Attacks) Malicious Software Types Viruses Worms Trojan Horses Spyware 3  Security (Forms of Attacks) Virus A virus is software that infects a computer by inserting itself into program that already reside in the machine. When host is executed, virus also executed. Degrading portions of OS, erasing large blocks of mass storage, 4 corrupting data and other programs  Security (Forms of Attacks) Worms A worm is an autonomous program that transfers itself through a network, taking up residence in computers and forwarding copies of itself to other computers. 5  Security (Forms of Attacks) Trojan Horse A Trojan horse is a program that enters a computer system disguised as a desirable program, such as a game or useful utility package, that is willingly imported by the victim. Starts immediate or wait for some event, Normally transferred using email attachments. 6  Security (Forms of Attacks) Spyware  Sniffing Software. collects information about activities at the computer on which it resides and reports that information back to the instigator of the attack.  Companies use to make customer profile.  Searching passwords and credit card numbers 7  Security (Forms of Attacks) Phishing Unlike spyware asking explicitly the required information normally using an email from so-called Government, law- enforcement agency, financial institute, etc 8  Security (Forms of Attacks) Denial of Service (DOS) attacks process of overloading a computer with messages an attacker usually plants software on numerous unsuspecting computers (botnet) that will generate messages when a signal is given. 9  Security (Forms of Attacks) Spam Unwanted Junk emails. Medium for phishing and Trojan horses. 1  Summary Security (Forms of Attacks) Viruses Worms Trojan Horses Spyware Phishing DOS 1 SPAM