Fecha de publicación: 27/03/2020 Fuente: Wipo "IOT" The invention discloses a key negotiation method and an electronic device, and relates to the technical field of communication. Specifically, the method comprises the following steps: an IoT control device multicasting a discovery message carrying a first public key in a first local area network, and sending a second ciphertext to a first IoT device after receiving a first ciphertext and a secondpublic key; after receiving the third ciphertext from the first IoT device, the IoT control device decrypting the third ciphertext according to the first session key to obtain a second signature and second session information; verifying the second signature based on the long-acting public key of the first IoT device; and after the second signature is successfully verified, performing encrypted communication with the first IoT device based on the first session key. According to the technical scheme, the IoT control device carries the first public key in the discovery message, so that the STS negotiation process is fused into the discovery process, the number of times of message interaction between the IoT device and the IoT control device is reduced, and the efficiency of obtaining the session key is improved.