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What is cybersecurity? A guide

Cybersecurity—also known as computer security—is the practice of protecting networks, devices, applications, systems, and data from cyberthreats.

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Cybersecurity overview: What it means for enterprises

Cybersecurity is the practice of protecting networks, devices, applications, systems, and data from cyberthreats. The overall goal is to fend off attacks that attempt to access or destroy data, extort money, or disrupt normal business operations—and whether those attacks come from within or outside the organization.

Why cybersecurity matters in 2025

Cybersecurity is essential to modern business operations. As organizations become more digital, they also become more vulnerable. Every connected device, cloud service, and remote access point introduces potential risk. Without a strong cybersecurity strategy, businesses face threats that can disrupt operations, damage reputations, and result in significant financial losses.

In 2024, the FBI’s Internet Crime Complaint Center (IC3) recorded $16.6 billion in reported cybercrime losses—a 33% increase over 2023. These figures reflect a growing trend: cybercriminals are becoming more organized, more persistent, and more difficult to detect. Attacks are no longer isolated incidents—they’re part of a global ecosystem of threats that target businesses across industries.

One of the most concerning developments is the rise in ransomware attacks. According to Check Point, ransomware incidents increased by 126% year over year. These attacks often begin with a phishing email or exploit a vulnerability in outdated software. Once inside, attackers encrypt critical data and demand payment—usually in cryptocurrency—to restore access. The consequences can be severe, especially for organizations that rely on real-time data and uninterrupted service delivery.

The financial impact of cyberattacks continues to climb. In 2024, according to Huntress, the global average cost of a data breach reached $4.88 million, up nearly 10% from the previous year. These costs include not only direct financial losses, but also legal fees, regulatory fines, customer churn, and reputational damage. For small and midsize businesses, a single breach can be catastrophic.

Cybersecurity also plays a critical role in enabling secure digital transformation. As companies adopt cloud platforms, mobile technologies, and enterprise cybersecurity solutions, they must ensure that data remains protected across all environments—including on premises systems and hybrid infrastructures. Security isn’t just about preventing attacks—it’s about building trust with customers, partners, and stakeholders.

The scale of the challenge is growing. With growing AI usage, some forecasts predict global data volumes will more than double by 2030, approaching the 400 zettabyte level. This explosion of data increases the attack surface and makes it harder to monitor, manage, and secure information effectively.

Cybersecurity is no longer a technical issue—it’s a strategic priority. Business leaders must treat it as a core component of risk management, innovation, and long-term growth. Whether you're protecting customer data, intellectual property, or operational systems, investing in cybersecurity is investing in the future of your organization.

How cybersecurity works

Cybersecurity works by combining technologies, processes, and practices to protect digital systems from unauthorized access, attacks, and damage. It operates across multiple layers of an organization’s infrastructure—from endpoints and networks to applications and data.

At its core, cybersecurity involves:

Modern cybersecurity also relies on continuous monitoring, threat intelligence, and automated defenses powered by artificial intelligence. These tools help organizations stay ahead of evolving threats and reduce the time it takes to detect and respond to incidents.

In enterprise environments, cybersecurity is integrated into governance, risk management, and compliance (GRC) frameworks. It supports secure cloud adoption, remote work, and digital transformation—ensuring that business operations remain resilient and trustworthy.

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Types of cyberattacks

Cyberattacks come in many forms, and they’re evolving rapidly. Understanding the most common types of threats is essential for building a strong enterprise cybersecurity strategy. Each attack vector targets different vulnerabilities—some exploit human behavior, while others take advantage of technical flaws or system misconfigurations.

Social engineering

Social engineering is the most prevalent form of cyberattack globally. It relies on psychological manipulation rather than technical exploits, making it especially dangerous. Attackers impersonate trusted sources—such as banks, vendors, or internal departments—to trick users into clicking malicious links, downloading infected files, or sharing credentials.

Variants include:

94

%

Of organizations experienced phishing attacks in 2024.1

Malware

Malware is a broad category that includes viruses, worms, trojans, spyware, and ransomware. It’s used to steal data, spy on users, disrupt operations, or extort money. Ransomware, in particular, has become a dominant threat—encrypting files and demanding payment for their release.

Attackers often use trojans to create backdoors into systems, allowing them to return later undetected. Malware can be delivered through email attachments, compromised websites, or infected USB drives. Some of the most famous (and costly) attacks have exploited vulnerabilities in VPNs—targeting misconfigured or outdated services to gain unauthorized access. Such breaches have impacted governments, enterprises, and millions of users.

81

%

Of organizations encountered malware in 20242

Advanced persistent threats (APTs)

APTs are long-term, stealthy attacks often carried out by state-sponsored or highly organized groups. These attackers infiltrate networks and remain undetected for months, gathering intelligence, stealing data, or sabotaging systems.

APTs typically target critical infrastructure, government agencies, and large enterprises. They use sophisticated techniques like zero-day exploits, lateral movement, and privilege escalation to maintain access.

19

%

Of successful industrial-sector cyberattacks in 2024 were attributed to APT groups—up from 13% in 2023.3

Internet of things (IoT) attacks

IoT devices—such as smart thermostats, cameras, and industrial sensors—are often poorly secured. Many lack basic protections like firmware updates or strong authentication. Attackers exploit these weaknesses to launch botnet attacks, gain network access, or disrupt operations.

IoT ecosystems are especially vulnerable in manufacturing, healthcare, and logistics, where connected devices play a central role in operations.

107

%

Increase in IoT malware in 2024 compared to 2023.4

Distributed Denial-of-service (DDoS) attacks

DDoS attacks flood systems with traffic, overwhelming servers and causing service outages. These attacks are often used to extort businesses, disrupt critical infrastructure, or distract from more targeted intrusions.

Modern DDoS attacks use botnets to amplify traffic and evade detection. They can last for hours or days, affecting customer access, internal operations, and even supply chains.

> 8 million

DDoS attacks globally in the first half of 2025—a 13% increase year over year.5

Other emerging vectors

Some of the most damaging attacks come from less frequent but highly impactful vectors:

These attacks are harder to predict and prevent, requiring advanced monitoring and zero trust cybersecurity models.

50

%

Increase in zero-day exploit use in 2024.6

Enterprise cybersecurity framework

A cybersecurity framework provides structure and guidance for managing risk, protecting assets, and responding to threats. It helps organizations align their security practices with business goals, regulatory requirements, and evolving threat landscapes. One of the most widely adopted models is the NIST cybersecurity framework, which breaks down cybersecurity into five core functions: identify, protect, detect, respond, and recover.

The five pillars of the NIST cybersecurity framework

  1. Identify
    This function focuses on understanding the business context, resources, and risks. It includes asset management, governance, and risk assessments. By identifying what needs protection, organizations can prioritize their efforts and allocate resources effectively.
  2. Protect
    Protection involves implementing safeguards to ensure the delivery of critical services. This includes access control, data security, training, and maintenance. Strong protection mechanisms reduce the likelihood of successful attacks and limit exposure.
  3. Detect
    Detection capabilities help organizations identify cybersecurity events in real time. This includes continuous monitoring, anomaly detection, and threat intelligence. Early detection is key to minimizing damage and accelerating response.
  4. Respond
    The response function outlines actions to take once a threat is detected. It includes incident response planning, communication, analysis, and mitigation. A well-defined response strategy helps contain threats and reduce recovery time.
  5. Recover
    Recovery focuses on restoring capabilities and services after an incident. It includes planning for resilience, coordinating with stakeholders, and improving future defenses. Recovery ensures business continuity and builds long-term confidence

Applying the framework in enterprise environments

For large organizations, implementing the NIST cybersecurity framework means integrating it across departments, systems, and geographies. It’s not just a checklist—it’s a strategic tool that supports enterprise cybersecurity maturity. Companies often tailor the framework to fit their industry, regulatory environment, and risk profile.

In enterprise environments, this might include:

The framework also supports the adoption of zero-trust cybersecurity principles, which emphasize continuous verification and least-privilege access. By combining structured guidance with adaptive technologies, enterprises can build a resilient cybersecurity posture that evolves with the threat landscape.

The future of cybersecurity

Cybersecurity is entering a transformative phase. As digital ecosystems grow more complex, the threats facing organizations are becoming more dynamic, more automated, and more difficult to predict. The future of enterprise cybersecurity will be shaped by emerging technologies, evolving attacker tactics, and the increasing need for resilience across every layer of the business.

Preparing for what’s next

To stay ahead, enterprises must invest in flexible, scalable security solutions that evolve with the threat landscape. This includes:

The future of cybersecurity will be defined by adaptability. Organizations that embrace innovation while maintaining strong governance will be best positioned to thrive in a digital-first world.

Cybersecurity summary: Key takeaways for business leaders

Cybersecurity is no longer just a technical concern—it’s a strategic business priority. As digital transformation accelerates, so does the complexity of the threat landscape. Organizations must protect not only their data and systems, but also their reputation, customer trust, and long-term viability.

The financial impact of cybercrime is staggering. According to Cybercrime Magazine, global losses from cybercrime are projected to reach $10.5 trillion USD in 2025. If measured as a national economy, cybercrime would rank as the third largest in the world—behind only the United States and China. This scale of disruption represents the greatest transfer of economic wealth in history and poses serious risks to innovation, investment, and global stability.

What business leaders need to know:

Cybersecurity also plays a critical role in compliance and governance zero trust cybersecurity. Regulations like GDPR, HIPAA, and industry-specific standards require organizations to demonstrate due diligence in protecting sensitive information. Failure to comply can result in fines, legal action, and reputational damage.

Ultimately, cybersecurity is about resilience. It’s about preparing for the unexpected, responding quickly to incidents, and recovering with minimal disruption. It’s about building a culture of security—where every employee understands their role in protecting the organization.

FAQ

What is the difference between information security and cybersecurity?
Information security (InfoSec) focuses on protecting data—whether it's stored, transmitted, or processed. It includes policies and technologies that safeguard sensitive information from unauthorized access or disclosure. Cybersecurity, on the other hand, is broader. It encompasses the protection of networks, systems, applications, and digital infrastructure from cyberattacks. While InfoSec is a subset of cybersecurity, the two disciplines often overlap in enterprise environments, especially when managing compliance and risk.
What is a botnet in cybersecurity?
A botnet is a network of compromised devices—often called “bots”—that are controlled remotely by an attacker. These devices can include computers, smartphones, and IoT hardware. Botnets are commonly used to launch denial-of-service attacks, distribute malware, or steal data. Because they operate silently and at scale, botnets are difficult to detect and can cause widespread disruption before being neutralized.
What is an attack surface in cybersecurity?
An attack surface refers to all the points where an unauthorized user could attempt to enter or extract data from a system. This includes hardware, software, network interfaces, cloud services, and even human users. As organizations adopt more digital tools—especially in hybrid and cloud security environments—the attack surface expands. Reducing it involves minimizing unnecessary access points, patching vulnerabilities, and enforcing strict access controls.
What is a phishing attack? How does it work?
A phishing attack is a form of social engineering where attackers send deceptive messages—usually emails or texts—designed to trick users into revealing sensitive information. These messages often impersonate trusted entities like banks, vendors, or internal departments. Phishing attacks may include malicious links, fake login pages, or infected attachments. Once a user engages, attackers can steal credentials, install malware, or gain access to enterprise systems.
What is spear phishing and how is it different from phishing?
Spear phishing is a targeted version of phishing. Instead of sending generic messages to a wide audience, attackers research specific individuals or organizations and craft personalized messages. These often include real names, job titles, or references to internal projects—making them harder to detect. Spear phishing is commonly used in business email compromise (BEC) attacks and can lead to financial fraud or data breaches.
What is a ransomware attack? How does it work?
A ransomware attack involves malicious software that encrypts a victim’s data and demands payment—usually in cryptocurrency—for its release. These attacks often begin with a phishing email or exploit a vulnerability in outdated software. Once inside, the ransomware locks files and displays a ransom note. Victims must choose between paying the ransom or attempting recovery through backups and incident response. Ransomware is one of the fastest-growing threats in enterprise cybersecurity.
What is a denial-of-service (DDoS) attack?
A denial-of-service (DDoS) attack floods a system, server, or network with traffic to overwhelm resources and disrupt services. These attacks are often launched using botnets and can target websites, APIs, or entire data centers. DDoS attacks may be used for extortion, political disruption, or as a distraction for more targeted breaches. Mitigation strategies include traffic filtering, rate limiting, and using distributed infrastructure.
Who are the hackers behind major cybersecurity threats?

Hackers targeting software security and enterprise systems fall into several categories:

  • Cybercriminals: motivated by financial gain, often using ransomware or phishing.
  • Hacktivists: driven by political or social causes, targeting government or corporate entities.
  • State-sponsored actors: focused on espionage, sabotage, or geopolitical disruption.
  • Insiders: employees or contractors who misuse access—either intentionally or accidentally.

Understanding attacker profiles helps organizations tailor defenses and improve threat intelligence.

What is zero trust cybersecurity?
Zero trust cybersecurity is a security model that assumes no user or device is trustworthy by default—even if they’re inside the network perimeter. It requires continuous verification, strict access controls, and segmentation. Zero trust supports hybrid workforces, remote access, and cloud security environments by minimizing the risk of lateral movement and privilege escalation.
What role does AI play in cybersecurity?
AI in cybersecurity helps organizations detect threats faster, automate responses, and analyze patterns across large datasets. It’s used in anomaly detection, behavioral analysis, and predictive threat modeling. AI can also support real-time monitoring and reduce false positives in security alerts. However, attackers are also using AI to improve phishing techniques and evade detection—making it a double-edged sword in the cybersecurity landscape.
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