Abstract / Summary
Abstract The ubiquitous proliferation of smartphones among minors has exacerbated acute threats including cyberbullying, predatory grooming, and unregulated screen addiction. While existing parental control and mobile supervision solutions attempt to address these risks, they suffer from a fundamental trilemma: (i) invasive operating system modification (e.g., rooting or accessibility abuse) that breaches Android security models and leaks unencrypted telemetry to third-party data brokers; (ii) severe energy depletion (20%--35% battery loss per day) caused by unthrottled background polling, prompting adolescent evasion; and (iii) vulnerable, easily bypassed enforcement mechanisms. In this paper, we present KiddiGuard, a resilient, zero-root edge-to-cloud telemetry and behavioral supervision architecture engineered for child digital protection. KiddiGuard combines a compact (1.8 MB) native Android companion daemon built on Clean Architecture with an Adaptive Low-Overhead Telemetry Ingestion (ALTI) engine, a high-throughput Node.js cloud ingestion backend, and a resilient parental portal. By quantizing battery state transitions and synchronizing data adaptively based on display interactivity states, KiddiGuard achieves an 85%--95% reduction in background CPU wakeups (reaching 96.7% during stationary nocturnal regimes) and maintains continuous supervision with less than 2.8% net battery consumption over a 24-hour cycle. Furthermore, we design a registered-email pairing handshake with zero third-party telemetry leakage, guaranteeing parental data sovereignty in compliance with COPPA, GDPR-K, and Google Play Family Policies. Comprehensive empirical evaluations across real hardware testbeds and high-concurrency cloud stress-testing demonstrate sub-50ms ingestion latencies, 18.2 MB peak RAM consumption, and robust horizontal scalability, offering an extensible, privacy-respecting blueprint for mobile supervision systems.