Patent ID: 8208632

Claim:
A network device comprising: an input circuit configured to receive a message comprising i) a transmitter Media Access Control (MAC) address and ii) a predetermined start value for a Temporal Key Integrity Protocol (TKIP) Sequence Count (TSC), and a plurality of encapsulated MAC Payload Data Units (MPDUs), wherein each of the plurality of encapsulated MPDUs comprises the transmitter MAC address and one of a plurality of values for the TSC, and wherein the input circuit receives the message before receiving the plurality of encapsulated MPDUs; a key mixing circuit configured to generate a plurality of seeds based on the message, wherein each of the plurality of seeds is based upon i) a predetermined key, ii) the transmitter MAC address, and iii) the predetermined start value for the TSC; and a decapsulation circuit configured to decapsulate one of the plurality of encapsulated MPDUs using one of the plurality of seeds that was generated based on a value for the TSC in the one of the plurality of encapsulated MPDUs.