A Scheme for Key Management on Alternate Temporal Key Hash

Wired equivalent privacy encryption of IEEE 802.11 standard is based on the RC4 stream cipher, but the weakness in its Initialization Vector (IV) derivation causes the Key Scheduling Algorithm (KSA) of RC4 to leak out the information about the secret key. It is shared among the particular participants in the Wireless LAN (WLAN). Housley et al. proposed an Alternate Temporal Key Hash (ATKH) to solve the weakness of the KSA; they defeated the particular IV may make the KSA to leak out the information about the shared secret key. However, the ATKH did not solve the key management in WLAN. Since a robust key management is a critical factor to prevent the eavesdropping from attackers. Therefore, in this paper, we shall propose a scheme to make key management feasible in their solution without changing the framework of the ATKH and the existing 802.11 standards.