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Because CCMP is a block cipher mode using a 128-bit key, it is secure against attacks to the 2 64 steps of operation. Generic meet-in-the-middle attacks do exist and can be used to limit the theoretical strength of the key to 2 n/2 (where n is the number of bits in the key) operations needed. [3]
CCM mode (counter with cipher block chaining message authentication code; counter with CBC-MAC) is a mode of operation for cryptographic block ciphers. It is an authenticated encryption algorithm designed to provide both authentication and confidentiality .
CCMP (CTR mode with CBC-MAC Protocol) The protocol used by WPA2, based on the Advanced Encryption Standard (AES) cipher along with strong message authenticity and integrity checking is significantly stronger in protection for both privacy and integrity than the RC4-based TKIP that is used by WPA. Among informal names are AES and AES-CCMP.
In cryptography, a cipher block chaining message authentication code (CBC-MAC) is a technique for constructing a message authentication code (MAC) from a block cipher.The message is encrypted with some block cipher algorithm in cipher block chaining (CBC) mode to create a chain of blocks such that each block depends on the proper encryption of the previous block.
CCMP is based on the Counter with CBC-MAC (CCM) mode of the AES encryption algorithm. CCM combines CTR for confidentiality and CBC-MAC for authentication and integrity. CCM protects the integrity of both the MPDU Data field and selected portions of the IEEE 802.11 MPDU header.
CCMP or ccmp may refer to: CCMP (cryptography), an encryption protocol used in Wi-Fi; CCMP Capital, a private equity investment firm; cyclic CMP (cCMP), a cyclic ...
GCM uses a block cipher with block size 128 bits (commonly AES-128) operated in counter mode for encryption, and uses arithmetic in the Galois field GF(2 128) to compute the authentication tag; hence the name. Galois Message Authentication Code (GMAC) is an authentication-only variant of the GCM which can form an incremental message ...
CCMP is a way to encrypt and authenticate 802.11 frames using AES-CCM; TKIP is a way to encrypt and authenticate 802.11 frames using a combination of RC4 encryption and Michael authentication; 802.11i is an IEEE security standard, includes both CCMP and TKIP; WPA is a WiFi Association certification that roughly maps to the Draft 3 of the 802.11i.