What is cyber security?

What is cyber security?

Cyber security is the practice of protecting networks, applications, confidential or sensitive data, and users from cyber attacks. Cyber attacks are malicious attempts by individuals or groups to gain unauthorized access to computer systems, networks, and devices in order to steal information, disrupt operations, or launch larger attacks. Common types of cyber attacks include, but are not limited to, phishing, malware (including ransomware), social engineering attacks, and denial-of-service (DoS) and distributed denial-of-service DDoS attacks.

Why is cyber security important?

Cyber security is important because it allows you to reduce risk so that businesses can remain operational, be good stewards of their users’ data and privacy, prevent revenue loss, and avoid regulatory consequences.

Cyber threats come in various forms, with different methods, targets, and purposes. Some of the most common threats include the following:

• Malware is software designed to disrupt normal operations of a device, and can refer to a wide range of attacks like worms, Trojans, adware, or spyware.
• Ransomware is a type of malware that locks computer files until the victim pays a ransom fee, with attackers’ goals ranging from purely monetary to taking the network offline.
• Social engineering attacks manipulate victims into handing over sensitive information used for malicious purposes like fraud or account takeover. Learn how to prevent account takeover attacks.
• Phishing attacks trick victims into sharing usernames, passwords, card numbers, bank account information, or other sensitive data.
• DDoS attacks are malicious attempts to disrupt the flow of traffic to a server or network by overwhelming the targeted infrastructure with a flood of traffic, which renders them non-operational.

What is the impact of a cyberattack?

The impact of a cyberattack can be far-reaching and devastating for businesses. One of the most significant impacts is economic costs, as cyberattacks can result in the loss of revenue, increased expenses for remediation and recovery, and supply chain disruption.

Cyber attacks can also impact brand reputation. When organizations suffer a data breach or a temporary outage, their brand image may be affected — resulting in poor media coverage and the potential loss of current and future customers to competitors.

Additionally, cyberattacks can result in regulatory costs, as companies may face fines for failing to protect user data in accordance with data protection laws such as the GDPR or HIPAA.

What are cyber security best practices?

There are a number of cyber security best practices that can be applied for both individual people and organizations.

For individuals:

• Use strong passwords
• Do not reuse the same passwords for different websites or apps
• Use multi-factor authentication or 2FA whenever possible
• Avoid unsecure websites (many browsers will warn you if you are about to visit an unsecured website, or look for a padlock in the URL bar at the top to make sure the website uses TLS for encryption and authentication)
• Do not download or open unfamiliar files or links
• Know the signs of a phishing email

For business:

• Enforce the above for all of your users
• Have visibility into all infrastructure used in your organization, including shadow IT
• Use DDoS protection to remain online
• Use firewalls and WAFs to protect internal networks and external-facing websites
• Encrypt and back up data
• Find a third-party risk management solution to implement a Zero Trust approach.

Learn more about cyber threat protection solutions from Cloudflare.

FAQs

What is the primary goal of cyber security?

Cyber security is the practice of defending networks, applications, and sensitive data from unauthorized access. Its main objective is to protect users and systems from malicious attempts to steal information, disrupt business operations, or launch broader attacks.

Why is cyber security considered essential for modern businesses?

Implementing strong security measures allows organizations to reduce operational risk and remain functional. It helps businesses act as responsible stewards of user privacy, prevents significant revenue loss, and helps ensure compliance with data protection regulations.

What are the different ways a cyber attack can impact an organization?

The consequences of a successful cyber attack are often far-reaching, including direct economic costs from remediation and lost revenue. Beyond finances, attacks can damage a brand's reputation, which can lead to a loss of customer trust and result in heavy legal fines for failing to meet regulatory standards like GDPR or HIPAA.

How does a DDoS attack differ from malware?

While both are harmful, they use different methods. Malware is malicious software (such as worms or Trojans) designed to disrupt a device's normal function. In contrast, a distributed denial-of-service (DDoS) attack focuses on overwhelming a server or network with a flood of traffic to take it offline.

What is the difference between phishing and social engineering?

Social engineering is a broad category of attacks that use psychological manipulation to trick people into giving up sensitive information. Phishing is a specific type of social engineering where attackers use deceptive messages to lure victims into sharing credentials, bank details, or other private data.

What steps should individuals take to improve their personal security?

Individuals should prioritize using strong, unique passwords for every account and enable multi-factor authentication (MFA) whenever it is available. It is also important to avoid unsecure websites, recognize the warning signs of phishing, and never download files from unfamiliar sources.

What specific strategies can businesses use to protect their infrastructure?

Businesses should maintain full visibility over their entire network — including unauthorized shadow IT tools — and deploy firewalls and web application firewalls (WAFs). Additionally, using DDoS protection, encrypting data, and adopting a Zero Trust approach with third-party risk management are critical for strong cyber defense.