CompTIA Security+ Question G-41

An IT auditor tests an application as an authenticated user. This is an example of which of the following types of testing?

A. Penetration
B. White box
C. Black box
D. Gray box

Answer: D

In this question, the tester is testing the application as an authenticated user. We can assume from this that the tester has at least limited knowledge of the application. This meets the criteria of a grey-box test. Gray box testing, also called gray box analysis, is a strategy for software debugging in which the tester has limited knowledge of the internal details of the program. A gray box is a device, program or system whose workings are partially understood. Gray box testing can be contrasted with black box testing, a scenario in which the tester has no knowledge or access to the internal workings of a program, or white box testing, a scenario in which the internal particulars are fully known. Gray box testing is commonly used in penetration tests. Gray box testing is considered to be non-intrusive and unbiased because it does not require that the tester have access to the source code. With respect to internal processes, gray box testing treats a program as a black box that must be analyzed from the outside. During a gray box test, the person may know how the system components interact but not have detailed knowledge about internal program functions and operation. A clear distinction exists between the developer and the tester, thereby minimizing the risk of personnel conflicts.