An apparatus includes a key mixing circuit, an input circuit, and a decapsulation circuit. The key mixing circuit generates N Wired Equivalent Privacy (WEP) seeds, N.gtoreq.1, each based on a predetermined temporal key, a transmitter MAC address, and a predetermined start value for a Temporal Key Integrity Protocol (TKIP) Sequence Count (TSC). The input circuit receives a message including the transmitter MAC address and the predetermined start value. The key mixing circuit generates the N WEP seeds based on the message. The input circuit receives N encapsulated MAC Payload Data Units (MPDUs) each including the transmitter MAC address and one of N values for the TSC, greater than or equal to the predetermined start value. The decapsulation circuit decapsulates the N encapsulated MPDUs using one of the N WEP seeds generated based on the value for the TSC in the respective one of the N encapsulated MPDUs.