White-box testing The real point is that tests are usually designed from an abstract structure such as the input space, a graph, or logical predicates, and the question is what level of abstraction we derive that abstract structure from. That can be the source code, requirements, input space descriptions, or one of dozens of types of design models. Therefore, the "white-box / black-box" distinction is less important and the terms are less relevant. In penetration testing, white-box testing refers to a methodology where a white hat hacker has full knowledge of the system being attacked. The goal of a white-box penetration test
Black and white of sepia. Occasionally personal and commercial photographs might be hand tinted. Colour photography was originally rare and expensive and again often containing inaccurate hues. Color photography became more common from the mid-20th century. However, black-and-white photography has continued to be a popular medium for art photography, as shown in the picture by the well-known photographer Ansel Adams. This can take the form of black-and-white film or digital conversion to grayscale, with optional digital image editing manipulation to enhance the results. For amateur use certain companies such as Kodak manufactured black-and-white disposable cameras until 2009. Also, certain films are produced today