Callsign Intelligence Engine is a passive identity and fraud detection platform that analyzes thousands of data points across device, location, behavior, and third-party systems to distinguish legitimate users from bad actors. The engine operates through four primary pillars: **Ensembling:** Uses AI and machine learning to recognize users across different devices and locations by evaluating recognized characteristics and assessing the trustworthiness of those characteristics through continuous passive analysis. **Behavioral Biometrics:** Captures and learns individual user behavioral patterns such as typing style, swipe gestures, tap patterns, and how a device is held. These traits are unique to each user and cannot be replicated by bots, malware, or fraudsters. **Threat Detection:** Provides device-level security across multiple devices (phone, laptop, tablet) through device fingerprinting, malware blocking, bot detection, jailbreak/root detection, identity assurance, and cross-browser assurance. **Telecoms Intelligence:** Monitors and detects SIM swap attacks and SS7 protocol exploits using real-time timestamps to alert and intercept attacks targeting mobile network operator (MNO) vectors. The platform also incorporates location-based authentication to ensure consistent user authentication experiences regardless of geographic location. It is designed to be passive, minimizing friction for legitimate users while blocking unauthorized access.