Abstract: This application provides a method for accessing a network by an Internet of Things device, an apparatus, and a system, and relates to the field of Internet of Things in order to reduce hardware apparatuses need to be provided for an Internet of Things device, and reduce operation steps of a user when it is ensured that the Internet of Things device securely accesses a network. The method includes sending, by an Internet of Things device, an access request message to an access point, where the access request message includes a universally unique identifier (UUID), a service set identifier (SSID), and a first temporary password (pass_tmp), receiving, by the Internet of Things device, an access response message from the access point, where the access response message includes the SSID and a password, and accessing, by the Internet of Things device, a network using the SSID and the password.

Abstract: A session resumption method includes setting up, by a client, a first session with a server, storing, by the client, a first session identifier corresponding to the first session, and sending, by the client, an application message to the server, where the application message includes a current session identifier and service data such that the server resumes the first session based on the current session identifier after receiving the application message.

Abstract: This application provides a method for accessing a network by an Internet of Things device, an apparatus, and a system, and relates to the field of Internet of Things in order to reduce hardware apparatuses need to be provided for an Internet of Things device, and reduce operation steps of a user when it is ensured that the Internet of Things device securely accesses a network. The method includes sending, by an Internet of Things device, an access request message to an access point, where the access request message includes a universally unique identifier (UUID), a service set identifier (SSID), and a first temporary password (pass_tmp), receiving, by the Internet of Things device, an access response message from the access point, where the access response message includes the SSID and a password, and accessing, by the Internet of Things device, a network using the SSID and the password.