Disclosed is a method for locking a camera in a portable terminal by means of a cipher apparatus connected to the portable terminal. The portable terminal includes the camera for photographing an image, a memory for storing secret codes, an image processor for processing the photographed image, and a display unit for displaying the processed image. The method comprises the steps of the cipher apparatus receiving information of the portable terminal, establishing a secret code, and transmitting enciphered data; the portable terminal receiving the enciphered data and stopping an operation of the camera; and the cipher apparatus receiving information reporting a locked state of the camera, and storing and displaying the secret code and a telephone number of the portable terminal.