Ethical hacking vs penetration testing: what’s the difference?

The terms ‘ethical hacking and ‘penetration testing’ are often used interchangeably when referring to the process of probing an organisation’s systems, but they’re actually slightly different.

Knowing where they deviate is essential as they’re each a core component of cyber security.

You don’t want to call for an ethical hacker when you want a penetration tester or vice versa, because you’ll end up with a service that doesn’t meet your requirements.

Let’s take a look at what each process involves and how you can decide which one is right for you.

What is ethical hacking?

The goal of ethical hacking – like criminal hacking – is to find security vulnerabilities in an organisation’s systems. However, as the word ‘ethical’ suggests, the person conducting the attack must have the organisation’s approval before proceeding.

Why would an organisation ask someone to hack them? Simple: they understand that one of the best ways to identify the flaws that a cyber criminal might exploit is to think like a cyber criminal themselves.

Ethical hackers are often hired before a new system or major updates goes live. They test the systems, looking for weaknesses that they can exploit and keeping notes of their findings.

Similarly, organisations can call on ethical hackers as part of a ‘bug bounty’ scheme. These offer financial rewards to people who provide evidence of an exploitable flaw in the organisation’s systems.

Bug bounties aren’t simply a way of helping organisations identify weaknesses, though. They also incentivise recreational hackers to stay on the right side of the law.

Whether they’re being offered a bounty or not, many hackers will probe organisations’ systems in their spare time because they enjoy the challenge. But once they make a breakthrough, they might find it tempting to use their discovery for criminal gain – moving from ‘white-hat’ hacker to ‘black-hat’.

Offering them a reward for sharing their findings means it’s not simply a case of money vs ethics.

White hats, black hats and grey hats

Hackers are divided into three categories. White-hat hackers (i.e. ethical hackers) help organisations strengthen their defences by disclosing their findings.

Black-hat hackers, on the other hand, are purely in it for criminal gain. They’re usually motivated by money, but their attacks could also be political or vengeful (such as doxing someone – maliciously publishing their personal information).

In between those categories, you have grey-hat hackers. These are people who sometimes hack organisations in good faith but also conduct malicious attacks.

If this makes you worry about whether you can trust an apparent white-hat hacker, fear not. It’s extremely unlikely that anyone would conduct a malicious attack against an organisation they’ve been hired to probe, because it would jeopardise their career.

What is penetration testing?

Penetration testing is a specific type of ethical hacking, in which an organisation hires a certified professional to assess the strength of its cyber security defences.

These are usually performed via on-site audits of the organisation in question. The penetration tester will be given access to a certain amount of privileged information and attempt to use it until they find some sensitive information.

Different types of penetration tests focus on specific aspects of an organisation’s logical perimeter. These include:

  • External network tests;
  • Internal network tests;
  • Web application tests; and
  • Wireless network tests.

Unlike ethical hacking, penetration tests are typically carried out at regular, set times – typically quarterly or any time the organisation makes major changes to their networks or applications.

Which one is right for you?

At various times, ethical hacking and penetration tests will be the right solution for you, as both help you achieve essential cyber security objectives.

Ethical hacking gives you a thorough assessment of your security practices and, in the case of bug bounties, can help you spot weaknesses in systems that are already live.

Its approach to cyber security is far more diverse than penetration testing. Whereas penetration testing focuses primarily on system weaknesses, ethical hacking gives actors the freedom to use whatever attack methods they have at their disposal.

They can exploit system misconfigurations, send phishing emails, conduct brute-force password attacks, breach the physical perimeter or do anything else that they believe will give them access to sensitive information.

This is extremely helpful for identifying exactly how vulnerable your organisation is to cyber threats, because crooks are increasingly mixing up their techniques and conducting multi-layered, sophisticated attacks.

Of course, it’s often simply not feasible to go to such lengths every time you want to test the security of your system.

Penetration testing enables you to perform focused tests on specific parts of your organisation. The results are extremely useful for identifying system flaws – the extent of which can often only be identified through testing – and highlighting the steps that need to be taken to address them.

The benefits of this are self-evident, which is why so many data protection laws and frameworks – such the GDPR (General Data Protection Regulation) and the PCI DSS (Payment Card Industry Data Security Standard) – mandate that penetration tests be conducted regularly.

Becoming a certified ethical hacker

Are you thinking about becoming a professional hacker? You can develop the skills you need by taking our Certified Ethical Hacker (CEH) Training Course.

This five-day course is the world’s most comprehensive ethical hacking training programme, giving you practical, hands-on experience with the systems you’ll test and the tools you’ll use to identify vulnerabilities.

Our expert trainer will show you the tactics, technologies and motivations of criminal hackers, helping you understand and replicate their methods.


  1. Sampada D 5th November 2020
  2. Stanley Chauke 20th December 2020
  3. CEH classes in pune 25th January 2021
  4. Arcadius 13th February 2021

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