Optics: measuring and testing – By shade or color
Patent
1995-03-09
1996-08-06
Hantis, K.
Optics: measuring and testing
By shade or color
250226, G01J 346
Patent
active
055439209
ABSTRACT:
A system and a method for preventing use of unauthorized software contained at a remote location which is to be used with a device having stored information is disclosed. The device includes firmware having a hash code, and a hash function for operating on an initiation string. The device has a communication interface. A remote storage location has an initiation string. The communication interface of the device and the remote storage location are interconnected for transferring information such as the initiation string between the device and remote storage location. The result of the hash function operation on the initiation string is compared with the hash code. The communication interface is enabled when the result of the hash function operation on the initiation string and hash code contained in the firmware are the same. In the illustrated embodiment, the device is a color sensor having a sensor body. The sensor senses and stores information about the color of a selected object such as on an automobile. A serial port on the sensor body is operatively associated with the color sensor and allows interconnection to a serial port of a remote computer. The remote computer receives stored color information from the sensor. The remote computer generates the initiation string to the sensor. The serial port is enabled when the result of the hash function on the initiation string and hash code are the same.
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Collins John B.
Knapp Richard J.
Hantis K.
Kollmorgen Corporation
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