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Optical security enhancement device

  • US 9,514,316 B2
  • Filed: 04/30/2013
  • Issued: 12/06/2016
  • Est. Priority Date: 04/30/2013
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving a seed via an input at an interface of a security device;

    computing, by a micro-controller of the security device, a pattern for presentation as a programmable mask based at least in part on the seed;

    configuring a first display as the programmable mask in a window of the security device to be interposed between an eye of a user and at least one second display, the programmable mask configured to reveal information presented on at least one second display that is otherwise not obtainable from the at least one second display;

    configuring the window of the security device as a time-varying color filter;

    synchronizing, via a color sensor, the security device to a sequence of images presented on the at least one second display, which comprises a screen of an untrusted computer; and

    instructing the color sensor to reveal one image from a plurality of images being simultaneously displayed on the at least one second display to securely use the untrusted computer that is configured to present information via the at least one second display.

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