A WPA key, short for Wi-Fi Protected Access key, is a security protocol used to protect Wi-Fi networks. It is a password that encrypts data transmitted over the network, making it difficult for unauthorized users to access the network or intercept sensitive information.
WPA keys are typically 64 hexadecimal characters long, but can also be 256 bits long. They are generated using a combination of the network name (SSID) and a passphrase entered by the user. WPA keys are stored on the wireless router and on each device that connects to the network.