Penetration Testing

Penetration testing means that a cyber security specialist aims to detect weaknesses in information and communication technologies. It is used with similar techniques and apparatus to hackers. In other words, Penetration tester acts as a hacker. Penetration test methods are of 3 types Black-box, Grey-box, and White-box. 
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Black-box testing involves zero knowledge or information about the organization’s digital infrastructure and assets.
 
White-box testing includes sharing full network and system information with the tester.
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Grey-box testing contains combining both white and black box testing to simulate attacks from both insiders and outsiders.