Grey hat Grey hat The term "grey hat", alternatively spelled as "greyhat" or "gray hat", refers to a computer hacker or computer security expert who may sometimes violate laws or typical ethical standards, but does not have the malicious intent typical of a black hat hacker. The term began to be used in the late 1990s, derived from the concepts of "white hat" and "black hat" hackers. When a white hat hacker discovers a vulnerability, they will exploit it only with permission and not divulge its existence until it has been fixed, whereas the black hat will illegally exploit it and/or tell
Self colour Self colour A self colour refers to the top coat colouration of several domestic animals, such as dogs, pet rodents and cats. It refers to hairs of a uniform shade, with no banding or tipping of another colour. A true "self" coloured animal should also have no white markings such as bibs or blazes. However, other definitions exist. In contrast, a "sable" (dogs), "ticked" (dogs or cats) or "agouti" (cats or rodents) coat has two or more different colours along the shaft of the hair, with one colour at the base and usually a darker colour, such as black, at