A cracker is an individual who tries to access computer systems without authorization. These people are often malicious, unlike hackers, and have many means at their disposal to break into a system. To the computer crackers also they called " black hats ". They look for back doors in programs and systems, exploit those back doors and steal private information for malicious use. While hackers work to help organizations and individuals protect their systems and networks, crackers have a different goal in mind. When they breach the security of a network, they do so illegally without the permission of the owner, and they do so for personal gain. The skills and knowledge they possess are expressly used to breach security with malicious intent . Their objective may be to steal credit card
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