• Mrs. Sowmya Sunkara
• Jagadish Agasadavar
• K. S. Purushotham
• Karthik
• Suresh Goudappanavar

Recent advancements in quantum computing threaten traditional cryptographic systems such as RSA and ECC, which form the backbone of current secure communi- cation protocols. As Internet-of-Things (IoT) devices become ubiquitous in critical applications such as agriculture, healthcare, smart factories and smart cities, the need for quantum-resistant secure communication mechanisms has become essential. This project presents the design and implementation of a practical, embedded post-quantum communication system using the Kyber Key Encapsulation Mechanism (KEM), an algorithm selected by the National Institute of Standards and Technology (NIST) for standardization. The secure communication system is built using an STM32 microcontroller as the sensing and encryption node, an ESP32 module as a Wi-Fi communication bridge, and a Raspberry Pi as the decryption and monitoring server. After establishing a shared secret key using Kyber KEM, the system uses AES-256 encryption to securely transmit sensor data in real time. The proposed architecture ensures low-latency, tamper-resistant, and quantum-safe communication on resource- constrained embedded platforms. Experimental results demon- strate reliable transport, secure packet framing, computational feasibility, and end-to-end confidentiality of transmitted sensor data.

Post-Quantum Cryptography, Kyber KEM, AES-256, STM32, Raspberry Pi, ESP32, IoT Security, Lattice Cryptography.

"Quantum-Resistant Secure Communication between STM32 and Raspberry Pi using Kyber KEM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.12, Issue 12, page no.b433-b438, December-2025, Available :http://www.jetir.org/papers/JETIR2512161.pdf

"Quantum-Resistant Secure Communication between STM32 and Raspberry Pi using Kyber KEM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.12, Issue 12, page no. ppb433-b438, December-2025, Available at : http://www.jetir.org/papers/JETIR2512161.pdf