Secure Multi-Region Kubernetes Deployment for Trading Platform

Design a multi-region Kubernetes architecture for a high-frequency trading platform that ensures zero-downtime deployments, automatic failover, and compliance with financial regulatory requirements. Create a comprehensive infrastructure-as-code solution using Terraform that provisions redundant clusters across AWS and Azure, implements strict network segmentation, and includes automated security scanning for financial transaction microservices. Include specific considerations for encryption at rest and in transit, with detailed network policy configurations that prevent unauthorized access while maintaining sub-10ms latency requirements.