US 12,346,523 B1
Secure transmission of touch data using a device-specific calibration map
Roei Shlomo Menashof, Netanya (IL); Anatoly Tsvetov, Kfar-Yona (IL); and Oren Istrin, Tel-Aviv (IL)
Assigned to Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed by Microsoft Technology Licensing, LLC, Redmond, WA (US)
Filed on Jun. 26, 2024, as Appl. No. 18/754,506.
Int. Cl. G06F 3/041 (2006.01)
CPC G06F 3/0418 (2013.01) 20 Claims
OG exemplary drawing
 
1. A system for securely transmitting touch data, the system comprising:
a digitizer sensor to output touch data in response to a user interaction with a touch surface, the digitizer sensor having a unique noise signature that is detectable in measurements of the digitizer sensor;
a touch input detection engine to:
receive, from the digitizer sensor, the touch data that includes the unique noise signature of the digitizer sensor; and
transmit the touch data including the unique noise signature to a host system;
a digitizer calibration map uniquely associated with the digitizer sensor that is stored in a secure memory region of the host system; and
a touch input signal decryption engine executed by a processor of the host system to use the digitizer calibration map to substantially remove the unique noise signature of the digitizer sensor from the touch data.