Question

what is the difference between a Hacker and Craker

Answer 1

A hacker is a person who tries to bring down servers and computers, while the job of a cracker is to exploit bugs and issues so that they can be fixed

Answer 2

It really depends. Hacker has been used in a different way the last years.
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Answer 3

A hacker traditionally is a clever programmer who enjoys creating novel solutions to problems. Whereas a cracker is devious sort who enjoys breaking into systems.
See: http://searchsecurity.techtarget.com/definition/hacker

Answer 4

I have not heard the term cracker in awhile. I think the term has been absorbed into "black hat" hacker.