An audit trail is a record of what has been done, and who or what did it. For example, in a banking system, the audit trail would show the date, time and location of a transaction and how the ...

Consider a simple black-and-white image. If 0 is black (or on) and 1 is white (or off), then a simple black-and-white picture can be created using binary. In a low-resolution image, the pixels are ...