Rayhunter: Open Source Tool to Detect IMSI Catchers

The Electronic Frontier Foundation (EFF) has released Rayhunter, an open-source project using a modified mobile hotspot to detect IMSI catchers, also known as Stingrays. These devices masquerade as cell towers to collect data from nearby phones. Rayhunter runs on a low-cost Orbic Speed RC400L mobile hotspot and aims to help users uncover and combat this covert surveillance technique, providing more information for privacy protection.