• Secure APIs • Privacy-preserving ML • Role-based Access • Differential Privacy • Data Minimization Policies

Service & Middleware Layer

• Identity Federation • Context-aware Access Control • Secure Messaging (MQTT-TLS, DTLS) • Tokenization • Event Integrity & Audit Trails

• Local Data Filtering & Encryption • Secure Boot • Patch & Firmware Validation • Anomaly Detection • Network Segmentation / Micro-Firewalls

• Device ID & Authentication • Secure Element / TPM • Secure Update Mechanism • Data Protection at Source • Privacy by Design (minimized data collection)

• Encrypted Channels (TLS/DTLS/IPsec) • Network Access Control (802.1X) • QoS & Isolation

(Cross-cutting across all layers) • PKI Infrastructure • SIEM Integration • Privacy Impact Assessments • Threat Modeling • Continuous Monitoring