Ethical Hacking(To catch a thief think like a thief)......

 

Ethical Hacking is also known as white-hat hacking performed by the skilled computer experts to determine the loopholes in computer network system.It is performed by the companies to perform penetration tests of their network system.It is ethical and legal because it is performed to increase the safety of computer network.

With the increasing use of internet,companies are concerned about their security especially when it comes to things like customer personal information or valuable data there is considerable need for computer experts to work in ethical hacking.The logic behind ethical hacking is to protect our computer system from black-hat hackers.

Traditionally a hacker intrudes in a computer system for personal fun but recently hacker has taken a new meaning called cracker who breaks the computer system for personal gain.The ethical hacker possesses the skills,mindset and tools of a hacker but is also trustworthy.
Type of attack by a hacker or cracker- 

Non-technical attacks
Network infrastructure attack

Operating system attack          

Ethical Hackers formulates plan in the following way

1>System to be tested

2>Risk involved

3>When the tests are performed

4>How the tests are performed

5>How much knowledge about the system he has.

Tools for Ethical Hacker

1>Password cracking tools like LC4,John the Reaper or pwdump

2>Web applicationassesment tools or network scanner

Ethical hackers should be persistent and calm and self-evaluation is must.