Legislation recently introduced by two senators could upend online data practices by requiring large websites to tell consumers the value of their personal data.

The Designing Accounting Safeguards to Help Broaden Oversight And Regulations on Data, or DASHBOARD, Act, introduced June 25 by Sens. Mark Warner, a Virginia Democrat, and Josh Hawley, a Missouri Republican, requires commercial data operators with more than 100 million monthly active users to disclose the types of data they collect and regularly provide users with assessments on the value of the data.