Fecha de publicación: 09/02/2024 Fuente: Wipo "IOT" The invention relates to the technical field of communication, in particular to a communication method and device and a readable storage medium, and the method comprises the steps that an AMF/TMF generates and sends a nonce to IoT equipment, the IoT equipment generates a ciphertext based on the nonce, a serial number of the IoT equipment and a symmetric key pre-configured by the IoT equipment, then generates an SUCI based on the ciphertext and a key identifier (used for indexing the symmetric key), the IoT equipment sends the SUCI to the AMF/TMF, and the AMF/TMF sends the SUCI to the IoT equipment. Identity protection for IoT devices. By adopting the method and the device, the permanent identifier of the IoT equipment can be protected under the condition that the power consumption requirement of the IoT equipment is met, and the security of the IoT equipment is improved.