WASHINGTON (AP) — A little-known side to the government’s health insurance website is prompting renewed concerns about privacy, just as the White House is calling for stronger cybersecurity protections for consumers.

It works like this: When you apply for coverage on HealthCare.gov, dozens of data companies may be able to tell that you are on the site. Some can even glean details such as your age, income, ZIP code, whether you smoke or if you are pregnant.