China Posted September 13, 2005 Share Posted September 13, 2005 Privacy Enhanced Computer Display The privacy-enhanced computer display uses a ferroelectric shutter glasses and a special device driver to produce a computer display which can be read only by the desired recipient, and not by an onlooker. The display alternately displays the desired information in one field, then the inverse image of the desired information in the next field, at up to 120 Hz refresh. The ferroelectric shutter glasses allow only the desired information to be viewed, while the inverse image causes unauthorized viewers to perceive only a flickering gray image, caused by the persistence of vision in the human visual system (as illustrated here). It is also possible to use the system to "underlay" a private message on a public display system. Background & Objective: The Privacy Enhanced Computer Display is appropriate for situations where a computer display is to be located in a publicly accessible area, but the display itself may show information that should be kept private. Places such as banks (bank balances) hospitals (patient health information), pharmacies (drug information), airline ticketing and airport gate agent stations (passenger and security information) are all candidates for a privacy-enhanced computer display. Technical Discussion: The system consists of two display sources (the public display image Pij and the secret display image Sij) a special device driver, a fast-refreshing CRT, and a set of synchronized ferroelectric shutter glasses. If there is no desired public display, the RGB value (255, 255, 255) can be used. The special device driver alternately displays images of (Pij - Sij ) and ( Sij ). The human eye's persistence of vision blurs the two images into (Pij - Sij + Sij ) / 2, which reduces to Pij / 2, which is the public image, without any secret image being visible. To someone wearing the synchronized glasses, only the Sij image is seen. Collaboration: We are seeking collaboration for development in computer security systems. Future Direction: The current system uses wired shutter glasses; we will consider upgrading to infrared at some time in the future. We will also explore using other display technologies such as LCD and DLV (digital light valve) systems. :cool: Link to comment Share on other sites More sharing options...
Joe Sick Posted September 14, 2005 Share Posted September 14, 2005 I thought you were talking about this... http://www.livejournal.com/users/tongodeon/311999.html The "Work Blind" Curtain A while ago I mentioned an idea that I had about creating a "work blind". I actually ended up doing it. I had buttercup666 stand in my neighbor's cubicle and take a picture of me hard at work. Then I straightened the photo, undistorted it, and cropped it to the area in the doorway. I took it to Kinko's where they printed it onto vinyl, and grommeted the top with a kit that matrushkaka bought me. The result: The Work Blind. Think of it as the modern version of Jughead drawing eyes on his eyelids so that everyone thinks he's awake and paying attention all day, or Wile E. Coyote painting a tunnel entrance on the side of a mountain. Link to comment Share on other sites More sharing options...
brooksfb Posted September 14, 2005 Share Posted September 14, 2005 Thats useless if your IT guys can monitor the web site addresses that you visit. Link to comment Share on other sites More sharing options...
NASMTrainer Posted September 14, 2005 Share Posted September 14, 2005 orrrr, you could work while at work. I don't know, just a thought. Link to comment Share on other sites More sharing options...
DC_Skins Posted September 14, 2005 Share Posted September 14, 2005 Thats useless if your IT guys can monitor the web site addresses that you visit. Exactly, We use software to monitor if not block that stuff at the gateway.... some fool will buy it though. :doh: Link to comment Share on other sites More sharing options...
DC_Skins Posted September 14, 2005 Share Posted September 14, 2005 orrrr, you could work while at work. I don't know, just a thought. That's a great idea, I may have to give that a shot sometime. Link to comment Share on other sites More sharing options...
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