All research data is important, and keeping it secure is essential to preventing loss and unauthorized access or modification. Protecting research data requires a holistic approach, including protection of research and personal computers as well as online user accounts. But some data is especially risky, and could cause harm if released to the public. That is Sensitive Data. A quick rule of thumb is, how embarrased would you be if your data was published on the front page of a major newspaper? If you'd be proud to see your data there, and not concerned about its disclosure, your data is likely not sensitive. On the other hand, if you think you might lose your job over the release of that data, your data is likely high risk. If you have sensitive data, you will face additional requirements for storing and sharing your data. In particular sensitive information should be password protected and encrypted whenever on a device with internet access or stored online.