EMI Lock System & IoT Device Security Platform

### Tamper-Proof FinTech Device Collateralization The EMI Lock System allows electronics retailers, micro-lenders, and telecom operators to offer smartphones and hardware on installment plans with near-zero default risk. The platform couples a low-level device management daemon with a high-throughput cloud control plane. #### Key Invariants & Safeguards - **Kernel-Level Persistence**: Survives factory resets, ADB debugging, safe-mode bypasses, and unauthorized recovery mode flashing. - **Autonomous Offline Locking**: Cryptographic internal countdown timer restricts device functionality if payment verification is overdue, even if offline. - **Geo-Fencing & SIM Integrity**: Instantaneous security lockdown when unregistered SIM cards are detected or unauthorized firmware tampering is initiated. - **Zero-Friction Repayment**: Displays a persistent lock screen with direct one-click UPI, bKash, and card payment deep-links for immediate unlock. #### Technical Highlights - **Mobile Agent**: Native Android (Kotlin) leveraging Samsung Knox SDK and Android Enterprise Device Admin API. - **Cloud Gateway**: Ultra-low-latency Go WebSocket server managing persistent TCP heartbeats for hundreds of thousands of concurrent devices.