The IoT involves smart devices, deployed at scale, collecting massive quantities of data every day. And that data must be trustworthy. Organizations that work with critical, sensitive, or regulated data—for example, those that deal in energy, healthcare, or transportation—provide vital services to people and companies in a variety of areas. For those organizations, a serious data failure could be catastrophic, not just for them as service providers and for their customers, but for whole industries, for major facets of the economy, and for the health and safety of employees and end users in a variety of situations. And in the future, where control of machines such as driverless cars will dependent on the software and the sensor data they use, a lack of data integrity (due to error or malice) could lead directly to death. And it would also undermine the public’s trust in both the technology and in the companies and organizations behind it.