Cybersecurity

Definition:
Cybersecurity refers to the practice of protecting systems, networks, applications, and data from digital attacks, unauthorized access, damage, or disruption. It encompasses the technologies, processes, and controls used to safeguard information and maintain the confidentiality, integrity, and availability of digital assets.

Why It Matters:
As organizations rely more heavily on cloud platforms, connected devices, and distributed teams, the attack surface continues to expand. Effective cybersecurity reduces the risk of data breaches, service outages, financial loss, regulatory penalties, and reputational damage.

Core Principles (CIA Triad):

• Confidentiality – Ensuring that sensitive information is accessible only to authorized individuals.
• Integrity – Protecting data from unauthorized alteration or tampering.
• Availability – Ensuring systems and data remain accessible when needed.

Key Domains Within Cybersecurity:

• Network Security – Protecting internal and external network infrastructure.
• Cloud Security – Securing cloud-hosted workloads, identities, and configurations.
• Endpoint Security – Protecting user devices such as laptops, servers, and mobile devices.
• Application Security – Securing software from vulnerabilities throughout its lifecycle.
• Identity & Access Management (IAM) – Controlling and monitoring user access to systems.
• Security Operations (SecOps) – Continuous monitoring, detection, and response to threats.
• Governance, Risk & Compliance (GRC) – Managing risk, policy, and regulatory adherence.

Common Threats:

• Phishing and social engineering
• Ransomware and malware
• Distributed Denial of Service (DDoS) attacks
• Insider threats
• Credential theft
• Zero-day vulnerabilities

Related Terms:
Threat Detection, Vulnerability Management, Zero Trust, SIEM, SOC, Incident Response, Penetration Testing, Compliance Frameworks (ISO 27001, SOC 2, NIST).