In the gate control system, any object capable of being printed with the miniature image code can be used as the gatecard, and therefore, the gate control system has low cost and is easy to carry.
本发明的门禁系统中，任何可以印刷微型图像编码的物体均可作为门卡使用，因此成本低廉，携带方便。
2
Passengers can swipe an ID card to pass through a gate before taking a high-speed train.
乘坐高铁前，乘客可以刷身份证通过闸门。
3
Through a mathematical algorithm, a private key is like your electronic identification card; the public key is like the lock or gate mechanism that you present your ID card to.