What is Hacker

Hacking is usually seen as a negative word, meaning someone trying to steal information like bank account details or passwords, often through tricks such as phishing emails and spam. But hacking can also be used for good, like finding problems in a newly created service or program. Ethical hackers find the loopholes in a program or service and help the developers fix them, so that black hat hackers cannot use those loopholes to break in.

Types of hackers

Hackers are usually grouped by “hat colour”, an idea borrowed from old western movies where the good guys wore white hats and the bad guys wore black ones.

White hat hackers (ethical hackers)

White hat hackers test computer systems with permission from the owner. Companies hire them to find security holes before criminals do. Their work includes penetration testing (a planned, authorised attack to test defences), security audits and reporting bugs. Many earn rewards through bug bounty programs, where companies pay people who responsibly report security flaws in their products.

Black hat hackers

Black hat hackers break into systems without permission, usually for money, revenge or to cause damage. They steal personal data, spread malware, lock files with ransomware and demand payment, or sell stolen information. What they do is a crime in almost every country.

Grey hat hackers

Grey hat hackers sit in the middle. They may look for weaknesses without permission but without bad intentions, and then tell the owner about the problem, sometimes asking for a fee. Even with good intentions, accessing a system without permission can still be illegal.

Other terms you may hear

• Script kiddies: Beginners who use ready-made tools made by others without really understanding them.
• Hacktivists: People who hack to promote a political or social cause.
• State-sponsored hackers: Groups working for governments to spy on or disrupt other countries and organisations.

Skills of a good (ethical) hacker

• Strong knowledge of how computers, operating systems and networks work.
• Expertise in basic programming and scripting languages.
• A thorough understanding of how websites and applications are built.
• The ability to find loopholes in a program or service.
• The ability to explain problems clearly and guide developers in fixing them.
• Curiosity, patience and a strong sense of ethics.
• Enjoying what they do.

Is hacking legal?

It depends on one simple thing: permission. Testing a system you own, or one you have written permission to test, is legal. Breaking into someone else’s computer, account or network without permission is illegal. Most countries have laws against it, such as the Computer Fraud and Abuse Act in the United States, the Computer Misuse Act in the United Kingdom and the Information Technology Act in India. Penalties can include heavy fines and prison.

If you are interested in hacking as a career, the right path is to learn cybersecurity legally. You can practise on your own computers, use legal training platforms and capture-the-flag (CTF) challenges, and study for well-known certifications such as CompTIA Security+, Certified Ethical Hacker (CEH) or OSCP.

How hackers attack ordinary users

Most attacks on regular people are not clever movie-style break-ins. They usually rely on simple tricks:

• Phishing: Fake emails, texts or websites that trick you into entering your password or card details.
• Weak or reused passwords: When one website is breached, attackers try the same password on your other accounts.
• Malware: Harmful programs hidden in fake downloads, pirated software or email attachments.
• Outdated software: Old apps and systems with known security holes that were never patched.

Over the years, there have been many cases of online theft, where criminals used stolen bank details or tricked customers into handing over their logins and then moved money out of their accounts. Banks and tech companies have since added many more protections, such as two-factor authentication and fraud detection, but attackers keep changing their methods too. Antivirus and internet security software help, but they are only one layer of protection.

How to protect yourself from hackers

1. Use strong, unique passwords for every account, and keep them in a password manager.
2. Turn on two-factor authentication (2FA) or passkeys for email, banking and social media.
3. Keep everything updated, including your operating system, browser and apps.
4. Think before you click. Don’t open unexpected links or attachments, even if the message looks urgent.
5. Download apps only from official stores and trusted websites.
6. Back up your important files so that ransomware cannot hold them hostage.
7. Be careful on public Wi-Fi. Avoid logging into sensitive accounts, or use a trusted VPN.

Frequently asked questions

Is every hacker a criminal?

No. Many hackers are security professionals who protect companies and users. Only those who break into systems without permission are committing a crime.

What is ethical hacking?

Ethical hacking means testing a system’s security with the owner’s permission, so the problems can be found and fixed before criminals exploit them.

What should I do if I think I’ve been hacked?

Change your passwords from a safe device, turn on two-factor authentication, sign out of unknown devices, run a security scan and contact your bank immediately if any financial account is involved.

We hope this article helped you understand what a hacker is and how to stay safe online. Let us know your thoughts in the comment section below.