Patent ID: 7421075
Filing Date: 2008-09-02
Classification: H04L

Abstract:
1. A method of wirelessly generating a cryptographic key for use in encrypting wireless communications between a first host and a second host, the method comprising the steps of: selecting an initial modulation scheme for wireless transmission between the first host and the second host; transmitting via the initial modulation scheme first data to be used in generating the cryptographic key and an indication of a second modulation scheme; receiving via the second modulation scheme second data to be used in generating the cryptographic key and an indication of a third modulation scheme; transmitting via the third modulation scheme third data to be used in generating the cryptographic key and an indication of a fourth modulation scheme; and receiving via the fourth modulation scheme fourth data to be used in generating the cryptographic key; and generating the cryptographic key using the first data, the second data, the third data, and the fourth data.