Ethical Hacking Basics: A Beginner’s Cybersecurity Guide

Explore the OSI model's seven layers from physical to application, and how each layer coordinates data transmission, addressing, routing, and sessions, alongside the TCP/IP protocol suite and TCP handshake.

Explore the architectural blueprint of digital highways, including star, bus, and ring topologies. See how routers, switches, hubs, and servers power interconnected networks.

Discover IP addressing and subnetting, comparing IPv4 and IPv6 formats, and learn how subnet masks and binary concepts carve networks for efficient data flow.

Master Wi-Fi security basics by understanding WPA3 as the latest encryption standard, recognizing WEP as easily cracked, and strengthening networks with MAC address filtering and hiding the SSID.

Learn network scanning techniques to identify live hosts with ping, perform stealthy tcp syn scans, and use banner grabbing and udp scans to reveal services on open ports.

Explore packet sniffing with Vishakh to capture real-time network traffic and identify security issues using a Python subprocess that runs tshark on a chosen interface.

Learn to perform a basic network scan with the Nmap network mapper, discover hosts and services, and identify potential vulnerabilities using Python's nmap module through a TCP syn scan.

Explore the underlying web application architecture, from the client–server model and http requests to the three tier structure—presentation, logic, and data—plus client-side frameworks like React and Angular.

Identify common web vulnerabilities, including SQL injection and XSS, and learn how improper inputs enable data breaches, session hijacking, and site defacement in PHP and JavaScript contexts.

Fortify web applications with a web application firewall that sits between the client and server, inspecting requests and blocking malicious traffic, with network-based and host-based deployment and monitoring and logging.

Fortify web applications by implementing input validation and sanitization to prevent SQL injection and cross-site scripting, enforce authentication with JWT, and keep dependencies up to date to patch vulnerabilities.

Explore hands-on exploitation techniques, including sql injection and xss, and learn how attackers exploit databases and web pages while reinforcing ethical use, defense, and social engineering awareness.

Explore how sql injection vulnerabilities allow attackers to manipulate databases and extract sensitive information, stressing untrusted data, malicious payloads, and the need for input validation and parameterized queries.

Explore how cross-site scripting enables attackers to inject scripts that steal cookies in a reflected XSS attack, using a fetch call to a domain, highlighting input validation and output encoding.

Discover Windows and Linux security principles with defense in depth, including UAC, group policies, password complexity, file permissions, and Mac and SELinux AppArmor policies to prevent unauthorized access.

Learn how attackers crack passwords with brute force and dictionary attacks, using tools like John the Ripper and Hashcat, exploiting weak password policies and social engineering to bypass security.

Explore how attackers use privilege escalation to gain administrator or root access by exploiting vulnerabilities and misconfigurations in operating systems and services, including local and remote methods and social engineering.

Explore how rootkits hide in operating systems, evade antivirus, and gain privileged access to persist and control devices. Learn about ransomware and spyware and how phishing delivers payloads.

Strengthen security by enforcing the principle of least privilege, restricting user permissions to reduce attack surfaces, and implementing patch management and network segmentation to limit lateral movement.

Explore how John the Ripper cracks passwords from hash data to test password strength using a rockyou wordlist in a dictionary attack, highlighting the need for strong passwords.

Explore privilege escalation techniques through a Linux shell script demo that copies /bin/bash to /tmp/bash, sets seed bit, and gains root privileges, underscoring the need to secure seed binaries.

Explore the fundamentals of cryptography, including encryption and decryption that transform plaintext into ciphertext, cryptographic keys, symmetric and asymmetric methods, hashing, and digital signatures to protect confidentiality.

Explore encryption and decryption to protect sensitive information by transforming plain text into ciphertext with cryptographic algorithms and keys, and learn how AES in Python demonstrates robust data security.

Explore digital signatures as cryptographic bindings that ensure document integrity and signer authenticity. See how certificates, issued by certificate authorities, bind identities to public keys for secure communications and authentication.

Explore cryptanalysis techniques that crack cryptographic systems, from brute force attacks and Caesar cipher demonstrations to frequency analysis and chosen plaintext attacks, strengthening robust algorithms.

Explore how cryptographic tools in ethical hacking uncover vulnerabilities and strengthen defenses. Review brute force, dictionary, and rainbow table attacks; explore sha-256 hashing and a Hydra dictionary attack example.

Learn to implement basic encryption algorithms in Python by building a Caesar cipher that shifts letters, preserves case, and leaves non-alphabetic characters unchanged, with a practical demo.

Explore how attackers exploit weaknesses in weakly encrypted data using readily available tools like John the Ripper and Hashcat, including brute-force dictionary attacks or rainbow tables on an MD5 ciphertext.