What is the size of the wrapper applied by TKIP around the WEP encryption utilizing a key that is derived from the MAC address of the machine and the packet's serial number?

TKIP adds a 128-bit wrapper around the WEP encryption, using a key derived from the MAC address of the host device and the packet's serial number.

TKIP uses a mechanism called the Temporal Key Integrity Protocol (TKIP) Michael algorithm to generate the encryption key. The Michael algorithm uses a combination of the MAC address of the transmitting device and the packet serial number to generate a unique key for each packet.

Specifically, the algorithm combines the MAC address of the transmitting device, the packet serial number, and a shared secret key to generate a Message Integrity Code (MIC). The MIC is then used to encrypt the packet payload using a stream cipher.

By using a unique key for each packet, TKIP makes it much more difficult for an attacker to crack the encryption. Additionally, by using the MAC address of the transmitting device, TKIP ensures that each device has a unique key, which further enhances security.