The healthcare cloud has been growing incredibly, becoming an ever-more-important element of health information technology, or HIT. There are many reasons why the HIT cloud has been becoming more prominent, such as research and development and collaboration. Since the cloud has been expanding so rapidly, this may be a good time to reconsider security — and that means understanding the threat, reviewing best practices, and heightening awareness of emergent approaches. First, realize the cloud is only getting bigger.