Projector for projecting password

The diaphragm spot camera system and 10 um information terminal personal computer comprises A spot camera, solution corresponding through the network connections are. The spot camera 10 generating a cipher-based for network connection set and projects comprising a screen on SC. User input projection of personal computer A password on screen SC. The password is used to confirm the spot 10) and network connectivity and dipole coded communication between the personal computer PC. Configuration of this invention enhanced spot remote conveniences, which while ensuring consistency between datum the data transmission with the information terminal a network connecting the safety.