Question: What are the parameters used to form the input S to the Key Derivation Function (KDF) when deriving a UPU-MAC-IUE/UPU-XMAC-IUE from KAUSF?
Option 1: FC = 0x7C, P0 = 0x00, L0 = length of UPU Acknowledgement, P1 = CounterUPU
Option 2: FC = 0x01, P0 = 0x7C, L0 = length of KAUSF, P1 = CounterKAUSF
Option 3: FC = 0x7C, P0 = 0x01, L0 = length of UPU Acknowledgement, P1 = CounterUPU, L1 = length of CounterUPU
Option 4: FC = 0x00, P0 = 0x7C, L0 = length of KAUSF, P1 = CounterKAUSF
Explanation: The correct parameters used to form the input S to the KDF are specified in the given text as FC = 0x7C, P0 = 0x01 (UPU Acknowledgement), L0 = length of UPU Acknowledgement, P1 = CounterUPU, and L1 = length of CounterUPU. These parameters are used to derive a UPU-MAC-IUE/UPU-XMAC-IUE from KAUSF.