Delete your key pair
You can delete a key pair, which removes the public key that is stored in Amazon EC2. Deleting a key pair does not delete the matching private key.
When you delete a public key using the following methods, you're only deleting the
public key that you stored in Amazon EC2 when you created or imported the key pair. Deleting a public key doesn't remove the public key from any
instances to which you've added it, either when you launched the instance or later. It also
doesn't delete the private key on your local computer. You can continue to connect to
instances that you launched using a public key that you've deleted from Amazon EC2 as long as you
still have the private key (.pem) file.
Important
If you're using an Auto Scaling group (for example, in an Elastic Beanstalk environment), ensure that the public key you're deleting is not specified in an associated launch template or launch configuration. If Amazon EC2 Auto Scaling detects an unhealthy instance, it launches a replacement instance. However, the instance launch fails if the public key cannot be found. For more information, see Launch templates in the Amazon EC2 Auto Scaling User Guide.