Profile download method and apparatus for use in wireless communication system

The invention relates to a method and apparatus for downloading and installing communication service for communication connection through a terminal in a communication system. The communication methodof 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 receivinga fourth message including information on the profile from the profile provision server.