Cryptography · Unit 7 · 3 hrs
Malicious Logic
Exam-focused notes for Malicious Logic (Cryptography, CSC327): what the TU syllabus asks and how it has actually been tested, with 7 solved past questions from this unit.
What this unit covers
- Malicious Logic
- Types of Malicious Logic: Virus, Worm, Trojan Horse, Zombies, Denial of Service Attacks
- Intrusion
- Intruders and their types
- Intrusion Detection System
Types of Malicious Logic
Describe any three types of malicious logic. [5]
--- Malicious logic refers to a set of instructions or programs that are intentionally designed to cause harm, unauthorized access, or disruption to a computer system or network. --- A Trojan Horse is a program that appears to perform a legitimate or useful...
Full solved answer →Differentiate between Trojan horse and virus. Describe any two types of intruders. [5]
--- Basis Trojan Horse Virus --------- Definition A program with a known (legitimate) look but an unwanted/hidden effect. It performs a desired task but also performs unexpected functions. A self-replicating malicious program that attaches itself to files a...
Full solved answer →How does the nature of worms differ from viruses? Define PKI with its architecture model. [5]
--- Feature Virus Worm --------- Replication Attaches itself to executable files or boot sectors; needs a host program Self-replicating; does not need a host program Propagation Spreads when an infected program is executed by a user Spreads automatically ov...
Full solved answer →Intrusion Detection System
What is intrusion? Explain any two types of intrusion detection system. [5]
Intrusion detection is the process of identifying and responding to malicious activity targeted at a resource. An intrusion refers to any unauthorized attempt to access, manipulate, or compromise a system's resources, data, or services. An Intrusion Detecti...
Full solved answer →What does intrusion mean? How the system detect intrusion? List any four types of firewall. [5]
Intrusion refers to any unauthorized attempt to access, manipulate, or compromise a computer system, network, or data. It involves a set of actions that attempt to bypass the security mechanisms of a system to gain unauthorized access, steal information, di...
Full solved answer →Malicious Logic
What is malicious logic? How zombies are different from trojan horses? [5]
Malicious logic (also called malicious code or malware) refers to any hardware, software, or firmware that is intentionally included or inserted into a system for a harmful or unauthorized purpose. It is a set of instructions that causes a system to perform...
Full solved answer →Intruders and their types
Write short notes on: a. Classes of Intruder b. SSL c. DoS Attack [5]
--- An intruder is a person who attempts to gain unauthorized access to a system, to damage that system, or to disturb data on that system. Three classes of intruders are: 1. Masquerader A masquerader is an individual who is not authorized to use the comput...
Full solved answer →Make Unit 7 stick
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