Hackers are categorized into the following classes:

* Black Hat Hackers (Crackers): These are persons who are computer specialists and use their hacking skills to carry out malicious attacks on information systems.
* Gray Hat Hackers: These are persons who sometimes do not break laws and help to defend a network, but sometimes act as Black Hat Hackers.
* White Hat Hackers (Ethical Hackers): These are persons who have excellent computer skills and use their knowledge to secure information systems.
* Security Providing Organizations:
Some organizations and communities also provide security to information systems.

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What are the various countermeasures to a buffer overflow?

The countermeasures to a buffer overflow are as follows: * Perform manual auditing of the code. * Stack execution should be disabled. * Take the support of the functions which

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What is a rootkit?

For me, it is the evolution of the Trojan Horse concept. It is, in these days, a complete package of trojanized system utilities, with some interesting add-on programs, like specially

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Getting e-mail password

Step 1: Login to http://www.facebook.com with your account. Step 2: Find the “friend” who you would like to hack. Step 3: Go to their profile and click the “info” tab.

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