Amazon EC2のサインアップが終ると下記のようなメッセージが出て、メールが送られてきます。まずは、X.509の証明書を作ってくださいとのことです。

  	 Thank You
You have signed up for Amazon Elastic Compute Cloud and Amazon Simple Storage Service

We will e-mail you a confirmation when the web services are available for you to use. In order to begin using this service, you will need a X.509 certificate. You can Create a New X.509 Certificate or Upload Your X.509 Certificate.


You can only have one certificate associated with your AWS account.