Using a MAC in addition to symmetric encryption

Erik Ostermueller eostermueller at
Fri Jun 27 10:52:59 EDT 2008

Hello all,

If I exchange messages with a system and the messages are encrypted with a symmetric key, what further benefit would we get by using a MAC (Message Authentication Code) along with the message encryption?
Being new to all this, using the encrytpion and MAC together seem redundant.


--Erik Ostermueller


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