The pages that are printed by your colour laser printer may include tiny dots, almost invisible to the naked eye. The dots form a code that can be read by the US Secret Service, ostensibly to track down counterfeiters. Now, for the first time, the code has been cracked. The Secret Service has admitted before that the tracking information is part of a deal struck with selected colour laser printer manufacturers – including Xerox, Canon and many others. If a colour laser printer is used to forge a document and agents get sight of the document, the codes can be read. However, the full nature of the private information encoded in each document was not previously known…
