MIC
Message Integrity Check
(or Code), also called ‘Michael‘, is part of WPA and TKIP. The MIC is an additional 8-byte
code inserted before the standard 4-byte ICV appended in by standard WEP to the 802.11
message. This greatly increases the difficulty in carrying out forgery attacks.
Both
integrity check mechanisms are calculated by the receiver and compared against the values
sent by the sender in the frame. If the values match, there is assurance that the message
has not been tampered with.