Set up your security key
Sign in to your ebay account.
Go to Account Setting.
Choose Sign in and Security under the Personal Info.
Scroll down to see Security key sign in.
Click Turn on.
Enter your Password.
Click Continue on the new page that will be shown as Setup your security key.
If you are using an IDmelon Reader, insert it into the USB port of your device, tap your smartphone to the Reader which starts blinking blue for a few seconds to receive the notification.
If you are using IDmelon Pairing Tool, you will receive the notification on the smartphone which is already paired with your computer.
Done!