Cybersecurity or information technology security (IT security) is the protection of computer systems and networks from information disclosure, theft of or damage to their hardware, software, or electronic data, as well as from the disruption or misdirection of the services they provide.

Top cybersecurity challenges include evolving ransomware, AI-powered attacks, advanced social engineering, and securing multi-cloud environments. The increasing use of AI by both attackers and defenders is rapidly shaping the threat landscape, while the expansion of remote work has broadened the attack surface for vulnerabilities in areas like IoT devices and supply chains.

The cybersecurity color wheel categorizes cyber teams by their roles:

• Red Team are ethical hackers,
• Blue Team are defenders,
• Yellow Team are developers who build secure applications.
• Purple Team facilitates collaboration between Red and Blue
• Green Team works with Yellow and Blue to implement secure coding practices
• Orange Team trains Yellow developers
• White Team manages the overall strategy, compliance, and coordination.

Source: Gemini AI Overview - 10/21/2025

This is a list of cybersecurity information technologies. Cybersecurity concerns all technologies that store, manipulate, or move computer data, such as computers, data networks, and all devices connected to or included in said networks, such as routers and switches. All information technology devices and facilities need to be secured against intrusion, unauthorized use, and vandalism. Users of information technology are to be protected from theft of assets, extortion, identity theft, loss of privacy, damage to equipment, business process compromise, and general disruption. The public should be protected against acts of cyberterrorism, such as compromise or denial of service.

Cybersecurity is a major endeavor in the IT industry. There are a number of professional certifications given for cybersecurity training and expertise.[1] Billions of dollars are spent annually on cybersecurity, but no computer or network is immune from attacks or can be considered completely secure.

This article attempts to list important Wikipedia articles about cybersecurity.

Source: Wikipedia

Certain individuals are consistently recognized as leading figures due to their long-term contributions, thought leadership, and widespread impact on the field.

Below are 25 highly regarded cybersecurity experts across different specializations.
From Gemini AI Deep Dive Overview – 10/20/2025

Source: Gemini AI Deep Dive Overview - 10/20/2025

Based on government roles, market influence, and nonprofit impact,  below are top cybersecurity organizations across government agencies, nonprofits, and companies

from Google AI Search.

Source: Gemini AI Deep Dive Overview - 10/20/2025

The most important cybersecurity competitions fall into different categories, from prestigious Capture the Flag (CTF) events for skilled hackers to defensive competitions for students and challenges focused on specific, high-stakes exploits. The significance of a competition can vary depending on one’s career level and goals, whether it’s for learning, recruiting, or showcasing elite skills. There are also other competitions such as those on the Kaggle website and by Leet code (see weblinks for urls).

Cybersecurity competitions are excellent for skill development across all experience levels, from middle school to seasoned professionals. They primarily fall into Capture The Flag (CTF) events, which are problem-solving-focused, and Red Team vs. Blue Team competitions, which simulate real-world attacks and defenses.

Source: Gemini AI Overview - 10/23/2025