In a world where almost all aspects of life are somehow connected to or dependent on the internet, such as banking, healthcare, education, and even entertainment, cybersecurity has undoubtedly emerged as one of the most important fields in today’s world. Be you a simple internet user or a businessman, or a large corporation operating around the world, cyber attacks pose a very real and growing threat to your security and can have a devastating impact on your life or your company. Therefore, it is extremely important to understand what cybersecurity is, why it is important, and how it works.
Defining Cybersecurity
Cybersecurity is defined as the practice of securing computers, servers, mobile devices, electronic systems, networks, and data from malicious attacks, unauthorized access, damages, and thefts. This term is broad and encompasses a wide range of disciplines, technologies, and processes aimed at securing computer systems and data. It is also referred to as Information Technology security or Electronic Information security.
Generally, cybersecurity is founded on three main principles, which form the foundation of the CIA Triad. These principles are:
Confidentiality: This is concerned with ensuring that sensitive information is only available to approved entities.
Integrity: This is concerned with ensuring the accuracy and authenticity of the data, meaning it has not been altered in any way.
Availability: This is concerned with ensuring that systems and data are available to approved entities when they need them.
The major types of cybersecurity threats
Cyber threats are diverse in nature, and they change frequently. However, some of the most common types of cyber threats faced by people and organizations all over the world today are as follows:
Malware is malicious software aimed at interfering, damaging, and accessing unauthorized computer systems. It comprises viruses, worms, Trojan horses, ransomware, and spyware. Ransomware, in specific, has risen significantly across the world, wherein cyber attackers hold an organization’s data hostage and ask for money in exchange for giving access to the data.
Phishing is an attack in which attackers send fraudulent emails that mimic legitimate communication. They aim to deceive the recipient into providing sensitive information. Phishing is one of the most successful cyber attacks in the world. This is because phishing is a psychological attack, not a technological one.
In a Man-in-the-Middle (MitM) attack, attackers intercept communication between two systems and steal the data. This is common in public Wi-Fi networks. A Denial-of-Service (DoS) is an attack in which attackers flood a network, making it unavailable to the original users. This is called a Distributed Denial-of-Service (DDoS) when attackers use a botnet to perform the attack. SQL injection is an attack in which attackers inject malicious code into a database through vulnerable fields, giving them access to the data.
Core Domains of Cybersecurity
Cybersecurity is not a single domain; it comprises several specialized domains. Network security is one of them, which involves securing the integrity and usability of network infrastructure through tools like firewalls, intrusion detection systems, and virtual private networks (VPNs). Next is application security, which involves ensuring the absence of security threats in applications and devices. This is done by identifying and patching security vulnerabilities in the application development phase. Cloud security is another domain, which is becoming increasingly important as businesses around the world move to cloud infrastructures like Amazon Web Services, Microsoft Azure, and Google Cloud.
Another domain is endpoint security, which involves securing individual devices like laptops, smartphones, and tablets from cyber threats. Next is identity and access management (IAM), which involves authenticating and verifying individuals accessing certain resources. Operational security (OpSec) is the domain responsible for defining the rules and guidelines for handling and securing data assets. Finally, disaster recovery and business continuity planning is the domain responsible for defining the response to a cyber threat or data breach.