Patent ID: 8549296
Filing Date: 2013-10-01
Classification: H04L

Abstract:
1. A method comprising: receiving, by a computing device, a set of at least two synchronization messages, wherein each synchronization message of the at least two synchronization message comprises a respective authentication token for comparison with a respective corresponding trusted bit string associated with the respective unique sender; applying, by the computing device, a hash function to the authentication token of each received synchronization message of the set at least one time to generate a corresponding hash result for each received synchronization message; determining, by the computing device, whether the hash result for each received synchronization message matches the corresponding trusted bit string for the unique sender associated with the received synchronization message; defining, by the computing device, a time point boundary between a first time synchronization period and a second time synchronization period using a value that is determined based at least in part on receipt times of each received synchronization message of the set whose corresponding hash result matched its corresponding trusted bit string; and for each received synchronization message whose respective corresponding hash result matched its respective corresponding trusted bit string, replacing, by the computing device, the corresponding trusted bit string with the corresponding authentication token of the received synchronization message, wherein the unhashed authentication token replaces the corresponding trusted bit string.