Patents Assigned to DHVA, Inc.
  • Security method using information transmission by optical means, and an optical disk for implementing the method
    Patent number: 7167562
    Abstract: An electronic security device has a light-receiving interface that receives a modulated light signal emitted by the screen of a computer making use of the data medium, an output interface adapted to emit output information as a function of the received input information, and an electronic central unit connected to the receive and emit interfaces and adapted to determine the output information as a function of the input information and to cause said output information to be emitted.
    Type: Grant
    Filed: July 6, 2001
    Date of Patent: January 23, 2007
    Assignee: DHVA, Inc.
    Inventor: Maurice Milgram