Which key length is associated with WPA/WPA2/WPA3?

Which key length is associated with WPA/WPA2/WPA3?

• A. 256-bit
• B. 64-bit
• C. 128-bit
• D. 1024-bit

Answer: (C)

WPA/WPA2/WPA3 use AES-based ciphers for data encryption, and the encryption key used on the wireless channel is 128 bits long. In these standards, the per-frame encryption key is fixed at 128 bits (CCMP in WPA/WPA2, AES-GCM/GCMP in WPA3), even though the pre-shared key or passphrase used for authentication may be longer when derived (often described as 256 bits in that context). The other options don’t match the actual cipher key size used to protect data on the air: 64-bit is too small for modern encryption, 1024-bit isn’t used for these cipher modes, and 256-bit refers to the PSK derivation rather than the on-the-wire encryption key.

WPA/WPA2/WPA3 use AES-based ciphers for data encryption, and the encryption key used on the wireless channel is 128 bits long. In these standards, the per-frame encryption key is fixed at 128 bits (CCMP in WPA/WPA2, AES-GCM/GCMP in WPA3), even though the pre-shared key or passphrase used for authentication may be longer when derived (often described as 256 bits in that context). The other options don’t match the actual cipher key size used to protect data on the air: 64-bit is too small for modern encryption, 1024-bit isn’t used for these cipher modes, and 256-bit refers to the PSK derivation rather than the on-the-wire encryption key.