Which algorithm is used by CCMP encryption?

Question

Options

• ARC4
• BAES
• CSMS4
• DMichael

• A
  5% (1)
• B
  76% (16)
• C
  5% (1)
• D
  14% (3)

Explanation

CCMP (Counter Mode with Cipher Block Chaining Message Authentication Code Protocol) is the encryption protocol used in WPA2, and it relies on AES (Advanced Encryption Standard) for its confidentiality and integrity operations, specifically using AES in CTR mode for encryption and AES-based CBC-MAC for authentication. RC4 is a distractor because it is the stream cipher used by the older, weaker WEP standard and by TKIP in WPA - not CCMP. SMS4 (also called SM4) is a Chinese national standard used in WAPI, an alternative to WPA2 developed for Chinese wireless networks, so it is unrelated to CCMP. Michael is the message integrity code algorithm used by TKIP in WPA, not CCMP - CCMP replaces Michael with the stronger CBC-MAC mechanism.

Memory tip: Link CCMP with AES by remembering the pairing of the two "stronger" standards - WPA2 replaced WPA, and AES replaced RC4, so CCMP and AES go together as the upgraded, more secure duo.

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