Hacker

A Hacker is cleaver System Programmer. And he/she interested in playing with system securities and other electronic devices. Hacker is passionate about learning in how a system will work, and finding new things. In the business of hacking there are three types of hacker.

1. White Hat Hacker : These hackers are considered as good guys . They don't use their hacking methods for doing illegal things. White hackers will help people from being hacked.

2. Grey Hat Hacker : Grey Hat Hackers are do both good things and bad things. They do legal and illegal things.

3. Black Hat Hacker : Black Hat Hackers are show their skill using hacking websites and stealing passwords and Creating some Trojan Malware Fuctions etc.

Top 5 Hackers

1. Kevin Mitnick

Kevin Mitnick

               Kevin Mitnick is a most famous hacker. He is the author of two books The Art of Deception & The Art of Intrusion. 

              To to win a bet he occupied administration privileges to IBM Computers at the Computer Learning center in LA [Los Angeles] 

2. Adrian Lamo

Adrian Lamo

Adrian Lamo is a Grey Hat Hacker. Using his hacking skill he hacked many computer networks like The New York Time, Yahoo, Microsoft .

3. Gary Mckinnon

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Gary Mckinnon is a Biggest Military Computer Hacker of all time. In one interview Gary Mckinnon said "Hacked into US military computer systems looking for information about UFO's". He Broken security systems of NASA and Pentagon And using his hacking skill he hacked 97 Computer systems [It damaged around $700,000 to the society].
Source: BBC News

4. Robert Tappan Morris

Robert Tappan Morris

Robert Tappan Morris is Created the first Computer worm on the Internet in 1988 and named it asMorris Worm. Robert Tappan Morris now working as Professor at MIT CS and Artificial Intelligence Laboratory.

5. Jonathan James

James

Jonathan James is an American hacker. He damaged NASA Systems, It costed $41,000 to fix the systems. 
Jonathan stealed software from NASA It worth $1.7 Million.


Source: Born 2 Hack