Cybersecurity encompasses the practices, technologies, and processes designed to protect computer systems, networks, programs, and data from unauthorized access, attacks, damage, or theft. As organizations increasingly depend on digital infrastructure, cybersecurity has evolved from a niche IT concern into a critical business priority that affects every industry and every layer of a technology stack.
The cybersecurity landscape includes multiple domains and disciplines:
- Network Security – Protecting network infrastructure from intrusions, malware, and unauthorized access using firewalls, intrusion detection systems, and VPNs.
- Application Security – Identifying and fixing vulnerabilities in software through secure coding practices, penetration testing, and code reviews.
- Data Security – Ensuring data confidentiality, integrity, and availability through encryption, access controls, and backup strategies.
- Identity and Access Management (IAM) – Managing user authentication, authorization, and permissions across systems.
Common cyber threats include phishing attacks, ransomware, SQL injection, cross-site scripting (XSS), distributed denial-of-service (DDoS) attacks, and supply chain compromises. Defending against these threats requires a layered security approach, often called defense in depth, where multiple protective measures work together to minimize risk.
For companies developing custom software, building security into the development lifecycle (a practice known as DevSecOps) is far more effective and cost-efficient than addressing vulnerabilities after deployment. Secure software development involves threat modeling, automated security scanning, dependency auditing, and adherence to frameworks like OWASP and NIST to ensure that applications are resilient against evolving cyber threats.