The programs offers a good way to create random keys for your safety. You will not have to think the key, Wireless Key Generator will generate it automatically. It can generate 64, 128 and 256 bits keys (10, 26 and 28 characters), as well as WPA Light, WPA2 minimum and WPA2 maximum (8, 20 and 63 characters).
In addition you can set random passwords of a certain length, just enter the number of characters and it will generate them.
Wireless Key Generator is a simple but useful application that will help you keep privacy thanks to safe keys.