Penetration testing, also known as pentesting, is a method used to evaluate the security of an IT system, network, or web application. It simulates an attack on the system to determine whether the security measures are sufficient to withstand attacks. There are different types of penetration tests, including white box, grey box, and black box testing. Each method has its own characteristics and objectives and can be used to address specific security issues.
White box
White box penetration tests are the most comprehensive and thorough form of penetration testing. In a white box pentest, the tester has access to complete information about the system being tested, including source code, network architecture, and usernames and passwords. This allows the tester to examine all aspects of the system and identify any weaknesses. White box pentests are often the most effective because they approach the system holistically, identifying all potential points of attack.
Grey box
Grey box penetration tests are an intermediate step between white box and black box testing. In a grey box pentest, the tester has limited information about the system being tested, such as the network structure or the names of some users. This allows the tester to examine all aspects of the system, but from the perspective of a user of the network, system, or application. These tests also provide a good understanding of the system’s security. They are often less time-consuming and more cost-effective than white box pentests.
Black box
In a black box penetration test, the tester has no information about the system being tested, except for the name and possibly the IP address. The tester must gather information about the system through scans and probes. In other words, the black box pentest starts from the perspective of an attacker, to assess how one can gather information and use it to potentially force access.
In summary, white box, grey box, and black box penetration tests are different methods of assessing an organization’s security from various perspectives.