Types of Hackers :-

White Hat Hacker- Also referred as Ethical Hacker or sometimes called as Sneakers. A

White Hat Hacker mainly focuses on securing corporate Network from outsider threat. They are with good intention who fight against Black Hat.

Grey Hat Hacker- They are Skilled Hacker who sometimes act legally and sometime not.

In simple word you may call a Grey Hat hacker as Hybrid between White Hat and Black Hat hacker

Black Hat Hacker- Also referred as Cracker. A Black Hat Hacker's intention is to break

into others Network, and wish to secure his own machine. They often uses different techniques forbreaking into systems which can involve advanced programming skills and social engineering..