To prohibit Federal agencies from mandating the deployment of vulnerabilities in data security technologies.

Secure Data Act of 2018 This bill prohibits: (1) a federal agency from requiring or requesting a manufacturer, developer, or seller of any computer hardware, software, or electronic device made available to the general public to design or alter the security functions in such products to allow the surveillance of any user or the physical search of such product by any agency; and (2) a court from issuing an order to compel any such manufacturer, developer, or seller to design or alter the security functions in its product to allow such surveillance, or to allow the physical search of such product, by an agency. The bill exempts from such prohibition mandates, requests, or court orders authorized under the Communications Assistance for Law Enforcement Act.