ethical hacker
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ethical hacker


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DEFINITION - An ethical hacker is a computer and network expert who attacks a security system on behalf of its owners, seeking vulnerabilities that a malicious hacker could exploit. To test a security system, ethical hackers use the same methods as their less principled counterparts, but report problems instead of taking advantage of them. Ethical hacking is also known as penetration testing, intrusion testing and red teaming. An ethical hacker is sometimes called a white hat, a term that comes from old Western movies, where the "good guy" wore a white hat and the "bad guy" wore a black hat.

One of the first examples of ethical hackers at work was in the 1970s, when the United States government used groups of experts called red teams to hack its own computer systems. According to Ed Skoudis, Vice President of Security Strategy for Predictive Systems' Global Integrity consulting practice, ethical hacking has continued to grow in an otherwise lackluster IT industry, and is becoming increasingly common outside the government and technology sectors where it began. Many large companies, such as IBM, maintain employee teams of ethical hackers.

In a similar but distinct category, a hacktivist is more of a vigilante: detecting, sometimes reporting (and sometimes exploiting) security vulnerabilities as a form of social activism.

Learn more about Security Testing and Ethical Hacking
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Ethical hacking techniques for standard penetration testing: I recently did a penetration test for one of our company's partners, only to find out that management had not obtained written permission from the partner for the test to be performed. The partner ...
Information security book excerpts and reviews: Visit the Information Security Bookshelf for book reviews and free chapter downloads.
Screencast: Google hacking, infosec style: In this exclusive screencast step-by-step demo, Tom Bowers explains how to ensure an organization's intellectual property doesn't fall into the wrong hands.
Quiz: What's your infosec IQ?: Test your information security IQ with this short quiz.
The Controversy of Hacking Books and Classes: Read this excerpt and download Chapter 1, Ethics of Ethical Hacking from Shon Harris' Gray Hat Hacking.
Crash course: Vulnerability management: Is vulnerability management a measurable and proactive process in your organization? Attend our on-demand webcast, and learn new tactics for managing the vulnerability lifecycle.

LAST UPDATED: 09 Jun 2009

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More resources from around the web:
- Risk Management's July 2003 cover story was "It takes a thief: Ethical hackers test your defenses."
- Sanctum offers a white paper called Ethical Hacking Techniques to Audit and Secure Web-enabled Applications.
- The Wall Street Journal Online has an article called "It Takes a Hacker."
- GoCertify explains Certification for Ethical Hackers.





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