Shared secret used between keyboard and application

摘要

A system comprises a processor which executes an operating system and an application. The system also comprises a keyboard coupled to the processor. The keyboard and application share a shared secret that is used to encode keyboard data provided from the keyboard to the application. The shared secret is not known or accessible to the operating system.

主权项

1. A system, comprising:
a processor which executes an operating system and an application; and a keyboard coupled to said processor; wherein said keyboard and said application share a shared secret, said shared secret not being known or accessible to said operating system; and wherein said shared secret is used to produce a sequence of keyboard character codes each time a key on the keyboard is pressed; and wherein each sequence is variable in at least one of the number of keyboard character codes included in the sequence and a location in the sequence at which the character code corresponding to the key pressed is located.