Encryption is used in communications systems to protect information being
transmitted over a channel from being intercepted and read by
unauthorised parties. This protection is achieved by converting the original
message (plain text) into an encoded form (cipher text) that
appears to be a random stream of symbols.
Data passes
though a security-related encoding process (encryption) before entering the channel.
At the receiver, data passes through a corresponding security-related decoding
process (decryption). The security-related transformations used in encryption and decryption
are both controlled by some form of secret information (known
as a key). The distribution of this secret information is
usually the responsibility of a trusted third party.
CDMA encryption
uses the the Cellular Message Encryption Algorithm (CMEA). The confidentiality
of transmitted data is also enhanced by the use of
CDMA, which hinders attempts at interception.
Other topics in our resources on CDMA related to CDMA Encryption include: