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Kaysarul Anas Apurba

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#artificial intelligence Preprint Aug 2026

A Non-Invasive Cloud-Based Migration Strategy for Post-Quantum Cybersecurity in Smart HVAC Systems: Architecture, Implementation, and Empirical Evaluation

Legacy smart HVAC controllers rely on vendor-cloud TLS secured by ECDH and RSA, both broken by Shor's algorithm, and typical 10-15 year lifespans mean today's devices remain in service through the quantum-threat era. Direct on-device post-quantum cryptography is infeasible: an ESP32-S3, representative of capable HVAC h...

Mahedee Zaman Moon, Kaysarul Anas Apurba, Mahamudul Hasan et al. · 0 citations

Preprint Aug 2026

Defending Retrieval-Augmented Intrusion Detection Against Knowledge Poisoning and Prompt Injection

RAG-IDS is presented, a three-tier multi-agent intrusion detection framework with a retrieval-boundary defense combining soft trust scoring, label-embedding consistency checking (LECC), and prompt sanitization, designed to recover classification quality under retrieval-layer attack.

Kaysarul Anas Apurba, Mahamudul Hasan, Mahedee Zaman Moon et al. · 0 citations

Preprint Aug 2026

SciRet: A Compute-Aware Empirical Study of Retrieval and Reranking for Scientific RAG

We introduce SciRet, a compute-aware empirical study of retrieval-augmented generation for scientific question answering over CORD-19. Rather than proposing a new model, we evaluate a fixed scientific RAG pipeline across three corpus scales: 1,034 chunks (1K papers), 5,160 chunks (5K papers), and 15,480 chunks (15K pap...

Kaysarul Anas Apurba, Mahade Hasan, Rofiqul Alam Shehab et al. · 0 citations