What is one key disadvantage of using WEP for wireless security?

The use of weak initialization vectors is a crucial disadvantage of WEP (Wired Equivalent Privacy) for wireless security. WEP relies on a 24-bit initialization vector that is combined with a secret key to encrypt data. This relatively short length means that there are not enough unique combinations available. Consequently, as the same keys are used repeatedly, it allows for the possibility of initialization vector collisions. Attackers can analyze traffic patterns and eventually determine the keys used for encryption. This vulnerability not only undermines the encryption’s effectiveness but also makes it easier for unauthorized users to gain access to the network and its data.

Understanding this disadvantage is essential for recognizing why WEP has been largely replaced by more secure protocols such as WPA (Wi-Fi Protected Access) and WPA2, which address these vulnerabilities with stronger encryption mechanisms and more complex key management systems.