Patent ID: 6789191
Filing Date: 2004-09-07
Classification: B41J,B42C,B42P,B65H,G06F,G06K,H04N,Y10S,Y10T

Abstract:
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.