Patent ID: 8712049
Filing Date: 2014-04-29
Classification: G06F

Abstract:
1. A system for implementing dynamic pseudorandom keyboard remapping, comprising: a keyboard in communication with an operating system of a computing device; the operating system configured to send an initial pseudorandom number generator (PRNG) seed value, x the keyboard configured to apply the selected PRNG algorithm f(x) to the initial PRNG seed value x the keyboard further configured to encrypt an original keyboard scan code corresponding to each of a plurality of keyboard keys, using a mapping algorithm, wherein the mapping algorithm encrypts the original keyboard scan code by using both the original keyboard scan code and the first pseudorandomly generated value, x the operating system further configured to decrypt the original keyboard scan code from the encrypted scan code generated by the keyboard, wherein the operating system also uses the same mapping algorithm used by the keyboard, the same PRNG algorithm f(x) sent to and used by the keyboard, and the same initial seed value x wherein the keyboard is further configured to, for each subsequent keystroke received by the keyboard following the first keystroke, generate subsequent pseudorandom numbers using the selected PRNG algorithm f(x) and a previous generated pseudorandom number in accordance with the expression f(x[n])=x[n+1], wherein the mapping algorithm encrypts the original keyboard scan code by using both the original keyboard scan code and a current one of the subsequent pseudorandom numbers.