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TKIP is a data encryption method that uses the WEP algorithm to encrypt data (hence, not requiring specialized hardware) but dynamically modifies the WEP key at periodic intervals. Because the key continuously changes an unauthorized intruder attempting to penetrate the network would be unable to gather sufficient WEP data to decrypt the current key before the key changes. TKIP is specified in the 802.11i standard and is part of WPA (Wi-Fi Protected Access.) TKIP fixes the flaws in the original WEP algorithm and includes a special message integrity check to assure that data has not been "spoofed."