Nok Nok Authentication Cloud is a cloud-based, turn-key passwordless authentication platform that enables organizations to deploy passkey-based authentication for web and native applications. The platform supports migration from password-based authentication to passkeys or security keys, providing App SDKs and a Sign-In Widget for integrating passwordless login into applications. A single developer API allows access to authenticators across multiple device types, reducing development and maintenance overhead. The product includes an adaptive authentication rules engine that allows configuration of registration and authentication policies without requiring application code changes. Authentication policies can be adjusted based on contextual data such as existing credentials, geolocation, device health, network characteristics, and authenticator properties. Authentication Cloud supports federation protocols, enabling low-code integration with existing Identity and Access Management (IAM) and Customer Identity and Access Management (CIAM) systems, as well as third-party cloud applications. The platform is designed to support early-phase passkey adopters who want to prototype and evaluate passkey solutions before moving to full-scale production deployment. Practical outcomes include reduced password reset volumes, lower SMS-based authentication costs, decreased account takeover risk, and compliance support for regulations such as PSD2 and CCPA by minimizing sensitive data storage.