Patent ID: 7715563
Filing Date: 2010-05-11
Classification: H04L

Abstract:
1. A method for acquiring a state vector at a receiving device of a counter-based cryptographic data communication system, the receiving device comprising a state vector processing device, said method comprising: receiving, in an unordered manner, a short component corresponding to the least significant bits of the state vector, and a number (N) of long components corresponding to more significant bits of the state vector, where N is a nonzero integer; maintaining N counters with said state vector processing device, including a respective counter for each of said long components; initializing the n-th one of said counters with said state vector processing device in response to receipt of the n-th one of said long components, where 1≦n≦N; incrementing any initialized counter with said state vector processing device in response to received data traffic flow to maintain current counter values; updating said short component with said state vector processing device in response to received data traffic flow to maintain a current short component value; and after receiving all of said long components, constructing a current state vector value with said state vector processing device, based upon said current short component value and said long components, and based upon said current counter values; wherein: long component L updating said long components comprises: