Optical sensing device for reading coded data on a surface and registration network for same
First Claim
1. A network including:
- a pen having an optical image sensor for sensing coded data printed on a surface, said coded data identifying a page identity for the surface and a plurality of locations on the surface;
a base station for communication with the pen; and
a registration server,the network characterized by;
a secret key and a public unique identifier being installed in a non-volatile memory of the pen and in a database of the registration server, before the pen is connected to the network;
the registration server configured to authenticate the pen when the pen is connected to the network by verifying an encryption from the pen, using the secret key, of a challenge message;
upon successful authentication, the pen being registered in the database of the registration server; and
the pen, when placed in an operative position relative to the surface, configured to capture images of the coded data, process the captured images and transmit to the base station digital ink comprising a series of strokes, each stroke comprising a sequence of time-stamped positions of the pen and the page identity.
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Accused Products
Abstract
A network including an optical sensing device and a registration server: wherein a secret key and a public unique identifier are installed in a non-volatile memory of the optical sensing device and in a database of the registration server, before the optical sensing device is connected to the network; wherein, the registration server is adapted to authenticate the optical sensing device when the optical sensing device is connected to the network by verifying the optical sensing device'"'"'s encryption, using the secret key, of a challenge message; wherein, if the authentication succeeds, the optical sensing device is registered in the database of the registration server; and wherein the optical sensing device is adapted to capture a sequence of time-stamped positions of the optical sensing device relative to a surface including coded data.
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Citations
12 Claims
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1. A network including:
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a pen having an optical image sensor for sensing coded data printed on a surface, said coded data identifying a page identity for the surface and a plurality of locations on the surface; a base station for communication with the pen; and a registration server, the network characterized by; a secret key and a public unique identifier being installed in a non-volatile memory of the pen and in a database of the registration server, before the pen is connected to the network; the registration server configured to authenticate the pen when the pen is connected to the network by verifying an encryption from the pen, using the secret key, of a challenge message; upon successful authentication, the pen being registered in the database of the registration server; and the pen, when placed in an operative position relative to the surface, configured to capture images of the coded data, process the captured images and transmit to the base station digital ink comprising a series of strokes, each stroke comprising a sequence of time-stamped positions of the pen and the page identity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification