220-801 · Question #1000
Which of the following wireless encryption types is vulnerable to weak IVS attacks?
The correct answer is A. WEP. WEP (Wired Equivalent Privacy) uses a 24-bit Initialization Vector (IV) combined with a static RC4 key. The short IV space causes frequent IV reuse, and many IVs are cryptographically weak. Tools like Aircrack-ng can collect enough weak IVs passively to crack the WEP key in…
Question
Options
- AWEP
- BWPA
- CWPA2
- DAES
How the community answered
(58 responses)- A90% (52)
- B3% (2)
- C2% (1)
- D5% (3)
Explanation
WEP (Wired Equivalent Privacy) uses a 24-bit Initialization Vector (IV) combined with a static RC4 key. The short IV space causes frequent IV reuse, and many IVs are cryptographically weak. Tools like Aircrack-ng can collect enough weak IVs passively to crack the WEP key in minutes. WPA and WPA2 addressed this by replacing the static key/IV scheme with dynamic per-packet key mixing (TKIP) and AES-based CCMP, eliminating the IV vulnerability.
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