問題文
An audit of a warehouse network finds one legacy access point configured for 802.11 shared key authentication. The owner argues this is safer than open authentication. Why is that wrong?
選択肢
- The exchange takes longer than open authentication and the roaming of clients therefore becomes slower.
- The exchange sends a challenge in the clear together with the encrypted reply and the access point therefore has to store every challenge.
- The exchange uses a certificate on the client side and most of the older devices in the warehouse cannot hold one.
- The exchange sends a challenge in the clear together with the encrypted reply and an observer therefore gains material which helps to recover the key in use.