CMEA (cipher)
In cryptography, the Cellular Message Encryption Algorithm (CMEA) is a block cipher which was used for securing mobile phones in the United States. CMEA is one of four cryptographic primitives specified in a Telecommuncations Industry Association (TIA) standard, and is designed to encrypt the control channel, rather than the voice data. In 1997, a group of cryptographers (Wagner et. al., 1997) published attacks on the cipher showing it had several weaknesses. There were some accusations made that the NSA had pressured the original designers into crippling CMEA, but the NSA has denied any role in the design or selection of the algorithm. The ECMEA and SCEMA ciphers are derived from CMEA.
CMEA is described in US patent 5,159,634.
See also
References
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|align=center|Algorithms: 3-Way | AES | Blowfish | Camellia | CAST-128 | CAST-256 | CMEA | DEAL | DES | DES-X | FEAL | G-DES | GOST | IDEA | Iraqi | KASUMI | KHAZAD | Khufu and Khafre | LOKI89/91 | LOKI97 | Lucifer | MacGuffin | Madryga | MAGENTA | MARS | MISTY1 | MMB | NewDES | RC2 | RC5 | RC6 | Red Pike | S-1 | SAFER | Serpent | SHACAL | SHARK | Skipjack | Square | TEA | Triple DES | Twofish | XTEA
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|align=center|Design: Feistel network | Key schedule | Product cipher | S-box | SPN
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|align=center|Attacks: Brute force | Linear / Differential cryptanalysis | Mod n | XSL
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|align=center| Standardisation: AES process | CRYPTREC | NESSIE
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|align=center|Misc: Avalanche effect | Block size | IV | Key size | Modes of operation | Piling-up lemma | Weak key
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