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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…

Networking

Question

Which of the following wireless encryption types is vulnerable to weak IVS attacks?

Options

  • AWEP
  • BWPA
  • CWPA2
  • DAES

How the community answered

(58 responses)
  • A
    90% (52)
  • B
    3% (2)
  • C
    2% (1)
  • D
    5% (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.

Topics

#WEP#IV attack#wireless security#encryption vulnerabilities

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