Communication system and method for operating such system

The invention is a kind of reverse certification system and method for content server provider to register mobile phone short message with identification, which includes a mobile phone user, client terminal, and mobile phone communication network, short message processing platform, business identification registering and testifying process system, content service providing system. They are carrying on data transmission through network. The invention applies the register signature code for identification test with short message type according to the uniqueness of the mobile phone number. The invention combines the current communication method and the network security technology, proposes a new network security new concept for electron businesses, it provides economic, convenient and quick security mechanism, guarantee the uniqueness of toe applier.