An Original Framework for Quantum-Resistant Cryptographic Protocol Design for Nigerian National Identity Infrastructure

Nigeria's National Identity Management Commission manages biometric identity data for over 100 million citizens, and the cryptographic infrastructure protecting this data faces an existential threat from the anticipated development of quantum computers capable of breaking current public key cryptography. This study develops an original framework for quantum-resistant cryptographic protocol design specifically for the Nigerian national identity infrastructure. The framework, designated QR-NIM, addresses four original design challenges unique to the Nigerian context: a constrained device compatibility protocol stack that implements NIST post-quantum cryptographic standards (lattice-based CRYSTALS-Kyber and CRYSTALS-Dilithium) on the computational profiles of Nigerian identity verification devices, including smart card readers and mobile verification terminals with 2GB RAM constraints; a hybrid transition architecture enabling simultaneous compatibility with classical RSA/ECDSA and post-quantum algorithms during the migration period without service interruption; a biometric template protection scheme combining fuzzy commitment with lattice-based commitments to provide quantum-resistant protection of enrolled fingerprint and facial templates; and a formal security proof in the quantum random oracle model for the end-to-end identity verification protocol. The QR-NIM protocol was implemented in a simulation environment and evaluated for security, performance, and compatibility. Verification transaction latency increased by 38 percent compared to classical equivalents, within acceptable bounds for the target use case. The study constitutes an original contribution to post-quantum cryptographic protocol design for national identity infrastructure.

Keywords: post-quantum cryptography, national identity, Nigeria, biometric security, lattice cryptography