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Describe the CMEA algorithm used in IS-95? john_pederson 13-May-2008 12:00:54 AMComments It is used for encryption. Posted by waqqas1 CMEA (Control Message Encryption Algorithm), a simple block cipher, is used to encrypt the control channel. Note that CMEA is not used to protect voice communications. Instead, it is intended to protect sensitive control data, such as the digits dialed by the cellphone user. A successful break of CMEA might reveal user calling patterns. Also sent CMEA-encrypted are digits dialed (all DTMF tones) by the remote endpoint and alphanumeric personal pages recieved by the cellphone user. Posted by sagitraz |
Posted: 13-May-2008 09:44:30 AM By: sagitraz CMEA (Control Message Encryption Algorithm), a simple block cipher, is used to encrypt the control channel. Note that CMEA is not used to protect voice communications. Instead, it is intended to protect sensitive control data, such as the digits dialed by the cellphone user. A successful break of CMEA might reveal user calling patterns. Also sent CMEA-encrypted are digits dialed (all DTMF tones) by the remote endpoint and alphanumeric personal pages recieved by the cellphone user. | |
Posted: 30-December-2008 02:59:57 PM By: waqqas1 It is used for encryption. |