Electrical computers and digital processing systems: support – System access control based on user identification by... – Pin/password generator device
Reexamination Certificate
2011-06-28
2011-06-28
Revak, Christopher A (Department: 2431)
Electrical computers and digital processing systems: support
System access control based on user identification by...
Pin/password generator device
C713S189000, C380S044000
Reexamination Certificate
active
07971066
ABSTRACT:
A transaction device adds or injects a random noise component into signals representing (x,y) coordinate signals associated with user interface with an input screen associated with the device. The noise component can be generated by converting to analog the output of a random number generator, and then adding the noise component to the x-axis and/or y-axis component of the (x,y) coordinate signal. Alternatively the noise component can be injected into the x-axis and/or y-axis operating potential for the input screen. The result is a masking of the original (x,y) positional information. The randomly generated number is only available internal to the device. The device can use this number to de-crypt the true (x,y) signals, which signals can then be re-encrypted before transmitting from the device.
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Fernando Llavanya
Soysa G. F. R. Sulak
Wang Nathan C.
Revak Christopher A
Symbol Technologies Inc.
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