EPIC has filed an amicus brief in United States v. Wilson, a case concerning Google’s scanning of billions of personal files for suspected unlawful content, at the behest of the federal government. EPIC argued that “because neither Google nor the Government explained how the image matching technique actually works or presented evidence establishing accuracy and reliability, the Government’s search was unreasonable.” EPIC also explained that “the lower court made a key mistake” by confusing file hashing, which uniquely identifies a file, and image matching, which is prone to false positives. Last year, EPIC filed an amicus brief in a similar case, United States v. Miller. EPIC has promoted algorithmic transparency for many years. EPIC routinely submits amicus briefs on the application of the Fourth Amendment to investigative techniques.