A profile downloading method and apparatus is provided for a terminal to download and install a profile in a communication system. The communication method of the terminal includes transmitting a first message including information on a profile to be received from a profile provision server; receiving a second message including information indicating whether an encryption code input is required and a first modified encryption code; generating, when the first modified encryption code is successfully authenticated, a second modified encryption code; transmitting to the profile provision server a third message including information requesting to the profile provision server for the second modified encryption code and profile download, and receiving a fourth message including information on the profile from the profile provision server.