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Interactive device network registration protocol

  • US 6,789,191 B1
  • Filed: 05/23/2000
  • Issued: 09/07/2004
  • Est. Priority Date: 05/25/1999
  • Status: Expired due to Fees
First Claim
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1. In a network connected to an optical sensing device and a registration server, a method for registering the optical sensing device with the registration server and using the optical sensing device, including the steps of:

  • installing a secret key and a public unique identifier in non-volatile memory in the optical sensing device and in a database of the registration server, before the optical sensing device is connected to the network;

    when the optical sensing device is connected to the network, authenticating the optical sensing device at the server by verifying the optical sensing device'"'"'s encryption, using the secret key, of a challenge message;

    if the authentication succeeds, registering the optical sensing device in the database of the registration server; and

    using the optical sensing device to capture a sequence of time-stamped positions of the optical sensing device relative to a surface, wherein the surface includes coded data that is read by the optical sensing device.

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