Black Fax Attack

black fax shirt

The term black fax refers to a prank fax transmission, consisting of one or more pages entirely filled with a uniform black tone and often made into a loop the sending machine will transmit endlessly. The sender’s intention is typically to consume as much of the recipient’s fax ink, toner or thermal paper or disk space as possible, thus costing the recipient money and/or denying the recipient the use of their machine (this is similar to computer-based denial of service attacks).

Black faxes can be particularly effective as the fax algorithm compresses the solid black image very well, so a very short fax call can produce many pages. They have been used to harass large institutions or government departments, to retaliate against the senders of junk faxes, or merely as simple pranks. In a black fax attack, one or more sheets are fed halfway through the sender’s fax machine and taped end to end, forming an endless loop that cycles through the machine. Not only can solid black be used, but also images which will repeat endlessly on the receiver’s machine until his or her toner runs out.

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