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Searching for: Cellular Message Encryption Algorithm?
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Searching for: Cellular Message Encryption Algorithm?
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Cellular Message Encryption Algorithm
From Wikipedia, the free encyclopedia.
(Redirected from 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. Some accusations were 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
External links
- The attack on
CMEA (http://www.schneier.com/cmea.html)
- Press release and the NSA response (http://www.snapshield.com/www_problems/United_States/New_Digital.htm)
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