Patent ID: 8065726
Filing Date: 2011-11-22
Classification: H04L

Abstract:
1. A method comprising: receiving at least one data packet having at least one new sequence number; comparing the at least one new sequence number to an anti-replay window configured to prevent packet replay, the anti-replay window having at least one existing sequence number, the anti-replay window having a starting index and an ending index corresponding to a starting sequence and an ending sequence of the anti-replay window, respectively; and shifting the contents of the anti-replay window by varying a location of the starting index and a location of the ending index in the anti-replay window, wherein the location of the starting index and the location of the ending index in the anti-replay window are varied circularly so that the location of the starting index is adjacent the location of the ending index within the anti-replay window after receiving at least some of the at least one data packet.