Lightweight and Scalable Post-Quantum Authentication for Medical Internet of Things
arxiv(2023)
摘要
The Medical Internet of Things (MIoT) harbors resource-limited medical
embedded devices that collect security-sensitive data from users for analysis,
monitoring, and diagnosis. Digital signatures play a foundational role in
ensuring the authentication and integrity of this sensitive medical
information, critical for the trustworthiness of MIoT applications. However,
traditional signatures used in current IoT systems may lack the necessary
long-term security and are vulnerable to emerging quantum computer threats.
NISt's PQC standards impose heavy overhead unsuitable for battery-limited MIoT
devices. Efforts to design more computationally efficient PQ signatures have
faced challenges, either introducing significant memory overhead and potential
vulnerabilities or relying on strong assumptions. Hence, this paper introduces
INFinity-HORS (INF-HORS), a lightweight PQ digital signature. To the best of
our knowledge, INF-HORS is the first signer-optimal hash-based signature
offering polynomial unbounded signing capabilities under minimal architectural
assumptions. Unlike other PQ signatures, INF-HORS does not require hyper-tree
structures or incur the high memory usage seen in multivariate counterparts.
Our performance analysis confirms that INF-HORS is significantly more
computationally efficient than NIST PQC standards like Dilithium and SPHINCS+.
We prove INF-HORS's security in the random oracle model and show through
experiments that it achieves 20x faster signature generation and smaller
signature and private key sizes compared to BLISS-I on an 8-bit ATxmega128A1
microcontroller. INF-HORS does not rely on non-colluding verification servers,
secure enclaves, or trusted verification assisting entities, minimizing
security risks and making it ideal for MIoT with minimal cryptographic overhead
and strong security assumptions.
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