Abstract: A method of generating key data for successful communications during a network link, which is applied in two information devices with wireless fidelity (WiFi) wireless modules. The two information devices use identical non-private key data (SSID and WEP private key) to achieve an initial connection, and exchange their own unique network card ID numbers. The first information device and the second information device both generate new key data by utilizing the first unique ID number and the second unique ID number to ensure security of the network link.

Abstract: The present invention relates to a method of updating an operating system image of a portable information device, wherein the portable information device comprises a burn program for burning a new operating system image to a memory of the portable information device. The method first detects size of the new operating system image saved in an external device; then checks if an available capacity of the memory is sufficient for the new operating system image; if the available capacity is sufficient, proceeding to a subsequent step; further, it downloads the new operating system image from the external device; and finally starts the burn program to burn the external new operating system image to the memory.