Callsign Authentication Suite is a multi-factor authentication (MFA) platform designed to support both active and passive authentication across user journeys in web and mobile channels. The suite covers all three SCA (Strong Customer Authentication) factors: - Knowledge: PIN and password-based authenticators, with optional layering of keystroke dynamics for added protection. - Possession: Device fingerprinting to replace SMS OTPs and cookies, with detection of rooted/jailbroken devices and software emulations. - Inherence: Behavioral biometrics that analyze how a user interacts with their device — including swipe patterns, typing behavior, and device-holding posture — rather than simply what they input. The platform supports traditional out-of-band authenticators such as voice, hard tokens, and SMS/email OTPs alongside passive authentication methods. It is designed to enable 2FA and 3FA from a single interaction, reducing user friction. Callsign Authentication Suite is deployable across multiple channels, including login, payments, and call center environments, removing the need for separate authentication vendors per channel. The product is described as compliant with existing regulations and designed to adapt to future regulatory requirements.