The blog post dives into the technical details of implementing the Modular Open-Source Identity Platform (MOSIP) on Amazon Web Services (AWS). It builds on the earlier discussion of how cloud-based digital identity systems can reduce costs and implementation times. The partnership between Atos and AWS aims to help governments establish digital identity systems for the 850 million people worldwide lacking official identification. The collaboration has resulted in significant cost reductions, with infrastructure costs dropping by 60–70% and operational expenses decreasing by 40–50%. Deployment can happen in as little as 3–6 months, compared to the typical 12–18 months for traditional systems. The technical deep dive focuses on the architecture and deployment models that support these benefits. AWS services, such as Amazon Elastic Kubernetes Service for orchestration, Amazon Aurora for databases, and Amazon Managed Streaming for Apache Kafka for data handling, are central to the system. The architecture emphasizes security and scalability, incorporating multiple layers of protection like AWS Shield and AWS WAF. The setup includes a private VPC where the core MOSIP services run across two availability zones, ensuring high availability and resilience. Four hybrid deployment options address data sovereignty and residency needs. Option 1 keeps production environments on-premises while hosting non-production workloads on AWS. Option 2 runs everything on AWS but retains key management and backups on-premises. Option 3 deploys sensitive services like biometric data on-premises, while other functionalities operate in the cloud. Each option balances the benefits of cloud scalability with the necessary control over sensitive information, allowing governments to tailor their digital identity solutions to their specific regulatory environments.