Access Rights on Amazon Web Services' EC2

I have recently created an EC2 account on Amazon Web Services.

I have created a key and am able to SSH into my box. I开发者_StackOverflow社区 also have a few developers working on the same box. I am wondering how I enforce access rights on my AMI Instance as new developers work on this box?

Also, I have given the key I use to access the box, mykey.pem, to a developer so he can access the box and am now wondering if that was the best thing to do. Is it possible to issue new *.pem keys for each new developer and add/remove accordingly?

Thanks.

Have you looked into using the new (and beta) AWS Identity and Access Management service? It provides the means to allow multiple users to access the same AWS resources without needing to share account keys.