The aim of this book is to explore the definitions and fundamentals of offensive security versus defensive security and describe the different tools and technologies for protecting against cyber threats. The book offers strategies of practical aspects of cybersecurity, covers the main disciplines needed to understand cybersecurity, and demonstrates ethical and legal concepts of cyber activities. It presents important concepts relevant for cybersecurity strategies, including the concept of cybercrime, cyber defense, protection of IT systems, and analysis of risks. In cybersecurity, strategies are broadly divided into two categories: offensive and defensive. While both approaches are vital, they offer different perspectives on protecting, detecting, and responding to threats. The key is employing the right strategy at the right time in order to protect against attackers, maintain business continuity in the face of cyberattacks, optimize resources, and adhere to regulatory compliance. Offensive cybersecurity, commonly called “OffSec,” focuses on actively seeking out systems’ vulnerabilities, flaws, and weaknesses before attackers can exploit them. The premise behind OffSec is simple: to best defend oneself, one must think and act like an attacker. This proactive approach includes strategies like penetration testing (or pentesting), red teaming, phishing simulations, and vulnerability assessments. While offensive cybersecurity aims to identify vulnerabilities by actively simulating cyberattacks, defensive cybersecurity, or “DefSec,” focuses on building and maintaining resilient systems that can prevent, detect, and respond to threats as they arise. This approach emphasizes layers of protection, including firewalls, antivirus software, intrusion detection systems (IDS), intrusion prevention systems (IPS), and incident response teams.

Offensive and Defensive Cyber Security PDF

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