The present invention provides a method and
system for offline secure distribution of digital certificates of NB-IoT
terminal equipment. The method includes:
logging in to the IoT cloud platform through the IoT platform user
client, performing the operation of creating a product on the IoT cloud platform, and obtaining a user identification code authorized by the IoT cloud platform; adding NB‑ to the created product through the IoT platform user
client The IoT terminal device and its corresponding device ID; the IoT cloud platform will synchronize the user ID and device ID to the
security service platform, so that the
security service platform can generate a digital
certificate for the NB‑IoT terminal device based on the user ID and device ID File
ciphertext; operate on the IoT cloud platform through the IoT platform user
client, choose to download the
ciphertext of the digital
certificate file of the relevant NB‑IoT terminal device, and transmit the
ciphertext of the downloaded digital
certificate file of the NB‑IoT terminal device offline To the
production line PC, for decrypting the ciphertext of the digital certificate file on the
production line PC, and filling the decrypted digital certificate file into the corresponding NB-IoT terminal device.