(The WEP protocol is widely used in Wlan to prevent illegal users from eavesdropping and tampering with data. However, with the in-depth research on the WEP protocol in recent years, the faults of the WEP protocol have been discovered one by one, and targeted attacks have been presented. , which brought a great threat to the security of Wlan. This paper analyzes the faults of the WEP protocol, and makes a specific discussion on the corresponding attack methods.)