how to an ethical haker works

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 usethe 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
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Security Testing and Ethical Hacking is sometimes called a white hat , a term that comesfrom old Western movies, where the "good guy" wore a white hat and the "bad guy" wore a black hat.
One of the first examples ofethical hackers at work wasin 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 technologysectors where it began. Many large companies, suchas 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.