WEP assumed all devices in the network share a secret key. The purpose of the authentication scenario is for the STA to prove that it possesses the secret key. As shown in the figure below, the STA sends a message to AP requesting authentication. The AP issues a challenge, which is a sequence of 128 random bytes sent as plain text The STA encrypts the challenge with the shared key and returns it to the AP. The AP decrypts the incoming value and compares it to the challenge that it sent. If there is a match, the AP confirms that authentication has succeeded. 1. a. b. c. This authentication scheme is one-sided. How can it be made mutual? What information does it provide to an attacker making it easy to attack? The encryption scheme is RC4 stream cipher. How can an attacker create a valid response for any challenge after watching just one valid authentication. Station Access Point Authentication Request Challenge Text Challenge Response (Encrypted Chalenge Text Confirm Success WEP assumed all devices in the network share a secret key. The purpose of the authentication scenario is for the STA to prove that it possesses the secret key. As shown in the figure below, the STA sends a message to AP requesting authentication. The AP issues a challenge, which is a sequence of 128 random bytes sent as plain text The STA encrypts the challenge with the shared key and returns it to the AP. The AP decrypts the incoming value and compares it to the challenge that it sent. If there is a match, the AP confirms that authentication has succeeded. 1. a. b. c. This authentication scheme is one-sided. How can it be made mutual? What information does it provide to an attacker making it easy to attack? The encryption scheme is RC4 stream cipher. How can an attacker create a valid response for any challenge after watching just one valid authentication. Station Access Point Authentication Request Challenge Text Challenge Response (Encrypted Chalenge Text Confirm Success