System for checking authenticity of commodity through terminal

The invention discloses a system for checking the authenticity of a commodity through a terminal. The system comprises an electronic tag; the checking terminal is used for identifying and reading the data of the electronic tag, writing in and sending verification instruction operation, and uploading the data to the background service system; the background service system is used for receiving the data sent by the checking terminal and interacting with the dense management system and the dynamic random code system at the same time; the dense management system is used for performing one-way verification on the electronic tag; and the dynamic random code system is used for generating and checking the legality of the dynamic random code and feeding back the legality to the checking terminal through the background service system. According to the method, verification of two stages can be carried out, one-way authentication of the dense management system on the electronic tag is completed in the first stage, namely