One day my client came to me and asking about something which I was not so familiar of. His requirement can be simply put like this.
He has an amazon account and have couple of S3 buckets. He has created a new S3 bucket and a new user. He needs this user to only access this new bucket. Let's call this user "new-user" and the bucket "new-bucket". I was not sure how to do this, but eventually I was able to. Read on if you want to know how to do this.