Biometric-Sealed Keys Using iOS Secure Enclave for Zero-Trust On-Device Security

The ongoing evolution of cybersecurity has necessitated a paradigm shift toward zero-trust architectures, in which no single component, user, or device is inherently trusted. In this context, the emerging technology of on-device security (such as iOS Secure Enclave based on biometric-sealed keys) can be regarded as a novel security system wherein cryptographic functions are hard-bound to user-specific biometric data stored within a secure, non-exportable enclave. This review discusses the technical foundation of biometric-sealed keys, privacy-preserving biometric systems, and their integration with federated identity and post-quantum cryptography. The importance of mutable biometrics, the generation of dynamic keys utilizing fuzzy logic, and low-latency encryption in relation to multi-hop authentication are further examined. Despite the considerable advantages, fallback vulnerabilities, device interoperability issues, and ethical concerns must also be considered in efforts to fully harness the potential of this technology. Privacy-first security architectures will be redefined through biometric sealing and secure execution environments that are resilient to hardware-level attacks and aligned with zero-trust principles in the modern digital ecosystem.