Collaborate Disseminate
Computer hardware is by and large compromised out of the box. Whether it’s sloppy factory code, or government-installed backdoors, it’s difficult to trust anything. A great example is that of color laser printers, the vast majority of which place hidden watermarks on printed pages. It’s a somewhat forgotten issue these …read more
Continue reading S400 Scanner Modified For Finding Hidden Watermarks
Public key watermarking uses a private key to embed the watermark and a corrosponding public key to detect.
Is it possible to detect a watermark from only a small chunk of the file? Does it matter which part? How big must th… Continue reading Public key (asymmetric) watermarking: detect from small chunk of file?
Is there a watermarking scheme for images and audio that is:
Invisible – should be imperceptible for a human.
Non-invertable – cannot be removed by any means without the original.
Robust – in order to destroy the watermark you have to sp… Continue reading Invisible, Non-invertable, public, robust, replicated watermarking scheme?
After his death, Aaron Swartz became one of the Internet’s most famous defenders of the free exchange of information, one of the most polarizing figures on the topic of intellectual property, and the most famous person that still held on to the ideals the Internet was founded on. Aaron was against DRM, fought for the users, and encouraged open access to information.
Early this year, Verso Books published the collected writings of Aaron Swartz. This eBook, according to Verso, contains ‘social DRM’, a watermarking technology that Verso estimates will, “contribute £200,000 to the publisher’s revenue in its first year.” This …read more
Assume I have a document which I supspect to have yellow tracking dots. How can I remove them while keeping the actual information on the document? Is making a b&w copy enough? Is the copy machine adding its own tracking?… Continue reading How to remove yellow tracking dots from a document?
I am referring to the yellow dots which are printed automatically by laser printers. They encode information such as the time the document is printed as well as the serial number. There appears to be quite little information … Continue reading Printer Steganography/Watermarking
