Cybersecurity Study Guide

Protecting digital systems and data involves implementing various strategies to safeguard information and ensure systems remain secure and operational. Key methods include anti-malware software, which detects and removes malicious programs, encryption, which converts data into a coded format to prevent unauthorised access, and acceptable use policies, which set clear guidelines for system and data usage. Additionally, robust backup and recovery procedures are crucial for restoring data and systems after accidental loss, corruption, or cyberattacks. These measures collectively aim to maintain data confidentiality, integrity, and availability against a range of digital threats.

Digital systems face various threats, primarily from malware and social engineering. Malware, short for malicious software, encompasses different types of harmful programs like viruses, worms, Trojans, ransomware, and key loggers, each designed to compromise system integrity, data, or user privacy in distinct ways. Viruses attach to legitimate programs and spread when those programs are executed, while worms self-replicate across networks. Trojans disguise themselves as useful software but secretly carry out malicious functions. Ransomware encrypts data and demands payment for its release, and key loggers record keystrokes to steal sensitive information. Beyond malware, technical vulnerabilities, such as unpatched software and outdated anti-malware, provide easy entry points for attackers. Hackers exploit these weaknesses. Social engineering, on the other hand, manipulates individuals into performing actions or divulging confidential information, often by impersonation or deceptive tactics, circumventing technical safeguards altogether. Understanding these threats is crucial for developing robust cybersecurity defenses.