Black fax
The term black fax refers to a
compress the solid black image very well, so a very short fax call can produce many pages.Use
Black faxes have been used to harass large institutions or government departments, to retaliate against the senders of junk faxes, or merely as simple pranks.[3][4]
The basic principle of a black fax can be extended to form a black fax attack. In this case, 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 its toner runs out.[5]
History
The introduction of computer-based facsimile systems (combined with integrated document imaging solutions) at major corporations now means that black faxes are unlikely to cause problems for them. On the other hand, the ability of computer modems to send faxes offers new avenues for abuse. A program could be used to generate hundreds of pages of highly compressed, pure black – or huge volumes of relevant-looking, original, non-repeating high-black-density junk, just as effective but far more difficult to counteract – and send them very quickly to the target fax machine.
Black faxes and fax loops are similar (in both intention and implementation) to lace cards.
See also
References
- ISBN 978-0434023158. Retrieved 15 June 2017.
- ^ Schmundt, Hilmar (February 17, 2011). "Investigators Pursue the Internet Activists of Anonymous". Spiegel Online. Retrieved 15 June 2017.
- ^ "Hackers turn to 'low-tech' fax in protesting cybercrime law". GMA News. October 6, 2012. Retrieved 15 June 2017.
- ^ Greenberg, Andy (November 30, 2012). "Anonymous Hackers Swat At Syrian Government Websites In Reprisal For Internet Blackout". Forbes. Retrieved 15 June 2017.
- ISBN 978-1590564318.
External links
- Black Fax Archived 2008-02-08 at the Wayback Machine at WordSpy
- Description of Black Faxing in court documents (Page 7, Section 6)