It is a digital card issuing software designed for QR access control hosts. It has a dynamic update mode (it will be automatically invalidated if it is not used within the time limit), QR Code authentication, supports public and private key encryption and decryption, effectively improves the security of use, and supports third-party authentication to open the door , It is safe and convenient to realize the cloud access control solution. It can replace the previous behavior mode of using non-contact RFID cards to implement the convenience of having one machine in hand. It can also be used for attendance management, sign-in and punch-in, personnel management, etc. It is suitable for enterprises, hospitals, campuses, community buildings and other fields. The first-line goalkeeper of safety protection, meeting the needs of multiple uses.