The Fourth Amendment and Technological Exceptionalism After Carpenter: A Case Study on Hash-Value Matching

The Fourth Amendment has long served as a barrier between the police and the people; ensuring the government acts reasonably in combating crime. Fourth Amendment jurisprudence is more dynamic than other constitutional guarantees, and has undergone periodic shifts to account for technological and cultural changes. The Supreme Court’s 2018 decision in United States v. Carpenter marks the most recent jurisprudential shift, as the Court departed from the well-settled reasonable expectation of privacy test to account for a new technology (CSLI records). This Note examines Carpenter’s impact on future Fourth Amendment cases, using another novel surveillance technique, hash-value matching, as a case study. Hash-value matching is a binary authentication method that can scan billions of digital communications in seconds for evidence of contraband