The Absolute Beginners Guide to Cyber Security 2026 - Part 1

All cybersecurity is information security, but not all information security is cybersecurity. Cybersecurity protects data in cyberspace, while information security covers all data forms, including the physical form.

Explore the CIA triad, confidentiality, integrity, and availability, and the AAA and DAD principles, plus privacy and non-repudiation, to understand how cybersecurity protects data.

Explore how protocols govern computer communication and port usage, covering http/https on ports 80 and 443, ftp/sftp on 21 and 22, imap on 143/993, and smtp on 25/587.

Learn how IP addresses identify devices on local and wide networks, including IPv4 and IPv6, and how MAC addresses provide unique, physical identifiers within a LAN.

Explore the world of hackers, their types, and hacking methods. Discover social engineering through practical insights and two dedicated lessons.

Compare Swordfish's dramatic hacking scene with reality, noting the real focus on information gathering, and mention Mr. Robot as a more accurate portrayal that can spark interest in cybersecurity.

Explore the main hacker types, from black hats and gray hats to script kiddies, hacktivists, disgruntled employees, and insider threats, and learn how motivations and roles shape cybersecurity risk.

Explore the hacker methodology by detailing reconnaissance, including passive and active reconnaissance, exploitation, privilege escalation, persistence, data extraction, and cover-up to understand how criminals gain and conceal access.

Explore social engineering in cybersecurity by examining how baiting, pretexting, quid pro quo, phishing, and vishing exploit human emotions to extract information.

Explore practical social engineering tactics like lunch time attack, tailgating and piggybacking, shoulder surfing, and dumpster diving, and learn prevention through training, vigilance, and proper data destruction.

Explore how cyber criminals use brute force attacks, phishing, and denial-of-service attacks to steal data and attack systems.

Understand brute force attacks as a trial and error method testing password combinations with software, and defend with eight character passwords using mixed case, numbers, and symbols.

Discover phishing, the leading cyber attack, including how fake emails and fake websites steal credentials, and learn practical recognition tips and defenses through training, alertness, and anti-malware.

Shows how phishing works by demonstrating cloned PayPal login pages with Kali Linux and Black Eye, capturing usernames and passwords, and redirecting victims to spoofed sites.

Explore how bots and botnets enable attackers to control infected computers via trojan horses, botmasters, and command and control servers, enabling DDoS attacks. Prevent infections by avoiding suspicious links.

Explore how DoS and DDoS attacks overwhelm web servers, distinguish single-source floods from botnet-driven ones, and implement defenses such as over-provisioning bandwidth, a DDoS playbook, and expert response.

Explore how the ping command tests a server's online status and how ping traffic can flood a target in denial of service attacks, with a cnn.com ping demo.

Learn how SQL injection attacks exploit databases to gain unauthorized access and alter data, and explore defenses like limiting privileges, data sanitization, and applying software patches.

Explore how supply chain attacks exploit third-party access to target networks, with SolarWinds and Target case studies. Implement defenses through auditing and restricted network access via segmentation and firewalls.

Explore malware fundamentals, including viruses, worms, and trojans, and learn why malware deserves its own module by examining diverse types one by one.

Viruses require an active host, while worms self-replicate and spread; they move via executables, email attachments, websites, flash drives, and network connections. Defend with antivirus, antimalware, and scanning attachments.

Learn how trojans masquerade as legitimate software, how backdoor, infostealer, downloader, and DDoS trojans operate, and how to defend with updates and trusted downloads, noting they cannot self-replicate.

Learn how adware and spyware infiltrate free software, hijack browser settings, and track activity via keyloggers and screenshots, and discover protection tips like premium software and spyware scanners.

Learn how ransomware behaves as a data kidnapping threat that encrypts files or exposes sensitive information. Discover defenses including backups, security training, disaster recovery, and ransomware as a service context.

Explore rootkits that hide before boot and disguise other malware, making detection and removal tough, and learn about browser hijackers that redirect pages and rogue security software that disables defenses.

Explore defense strategies and tools used to protect data, systems, and networks from cyberattacks, as we cover how the good guys defend against threats.

Firewalls monitor traffic between the internet and a company network, using packet filtering, proxy service, and stateful inspection to enforce access and protect data; hardware and software options exist.

Discover how encryption hides data by turning it into a cipher with keys, and how decryption reverses it. Compare asymmetric and symmetric encryption, with public/private keys and DES/AES.

Explore how biometrics authenticates access using physiological traits like fingerprints and face, and behavioral traits like voice and gait, stored in a database for accurate impersonation detection.

Explore how antivirus software protects against malware using signatures and heuristic methods, including sandbox testing, on-access scanning, and full system scans, while covering polymorphic viruses and detection factors.

Explore honeypots—production and research honeypots—that lure cyber criminals to study how attacks unfold, and see how DMZs with two firewalls add security before the internal network.

Discover the basics of wireless security, focusing on encryption and authentication to prevent unauthorized access. Compare WEP, WPA, WPA2, and WPA3, and learn practical checks for home networks.

master password management by crafting strong, formula-based passwords, avoid reuse and secondary emails for nonessential sites, and pair with two-factor authentication and have i been pawned breach alerts.