What protocol is introduced in WPA for message integrity checks?

WPA (Wi-Fi Protected Access) was developed as a security protocol to provide stronger data protection for wireless networks. One of the key features introduced by WPA is the use of TKIP (Temporal Key Integrity Protocol) for message integrity checks. TKIP dynamically generates keys that change frequently to enhance security by mitigating several vulnerabilities present in the WEP (Wired Equivalent Privacy) standard.

TKIP implements a mechanism that ensures the integrity of messages in transit. It accomplishes this by adding a message integrity check (MIC) to the packets transmitted over the network. This MIC helps prevent unauthorized users from intercepting and altering packets, thereby safeguarding the data integrity during transmission.

The other options, such as AES and CCMP, are related to newer security standards like WPA2, which also employs AES for encryption, providing stronger security than TKIP. However, in the context of WPA specifically, TKIP is the protocol that addresses message integrity checks. PPTP, on the other hand, is a method used for implementing virtual private networks (VPNs) and is not associated with wireless security protocols like WPA.