Patent ID: 9071964
Filing Date: 2015-06-30
Classification: H04L,H04W

Abstract:
1. A method for authenticating a message stream in a site, the method comprising: authenticating a radio at a site and storing unique authentication information for the radio at the site; receiving a subsequent non-authentication message from the radio at the site and identifying authentication information in the non-authentication message; comparing the unique authentication information stored at the site with authentication information identified in the non-authentication message, and when there is a match, authenticating the non-authentication message with an authentication code included in the non-authentication message, and upon successfully completing authentication, repeating the non-authentication message towards destination radios indicated in the non-authentication message; wherein the non-authentication message is a voice packet and a first predefined portion of the authentication code is obtained from a header portion of the voice packet and a second predefined portion of the authentication code is obtained from a data portion of the voice packet; and wherein the first predefined portion of the authentication code is obtained from a message indicator field in the header portion of the voice packet and the second predefined portion of the authentication code is obtained from a link control word in the data portion of the voice packet.