Combinational Circuit Using Verilog and OpenLane
Designed and implemented a 5-bit combinational ALU circuit using Verilog HDL and synthesized the design using the OpenLane toolchain with the SkyWater 130 nm Process Design Kit (PDK).
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portfolio
5-Bit CPU Simulation and Verification
Designed and simulated a 5-bit CPU and verified its correctness by executing sample programs stored in ROM.
Build a Large Language Model from Scratch
Implemented a GPT-style language model from scratch, including tokenization, embeddings, attention, transformer blocks, training, and text generation.
Micrograd: A Tiny Autograd Engine
A lightweight automatic differentiation engine implementing reverse-mode autodiff and neural networks with a PyTorch-like API.
publications
QSAC: Quantum-assisted Secure Audio Communication using quantum entanglement, audio steganography, and classical encryption
Published in Published in Engineering Science and Technology., 2025
This paper proposes QSAC, a novel framework for secure audio communication that integrates quantum key distribution (QKD) using the E91 protocol, classical encryption (ChaCha20-Poly1305), and audio steganography (LSB). The system generates a quantum-secured key, hashes it with SHA-3 for high entropy, hides the secret audio within a cover signal, and then encrypts it. Rigorous experiments demonstrated the method’s robustness against classical and quantum attacks, showing high randomness in the encrypted output (avg. entropy ~16) and successfully using the CHSH inequality to detect eavesdroppers.
Recommended citation: @article{RIFAT2025102167, title = {QSAC: Quantum-assisted Secure Audio Communication using quantum entanglement, audio steganography, and classical encryption}, journal = {Engineering Science and Technology, an International Journal}, volume = {70}, pages = {102167}, year = {2025}, issn = {2215-0986}, doi = {https://doi.org/10.1016/j.jestch.2025.102167}, url = {https://www.sciencedirect.com/science/article/pii/S2215098625002228}, author = {Md. Raisul Islam Rifat and Md. Mizanur Rahman and Md. Abdul Kader Nayon and Md Shawmoon Azad and M.R.C. Mahdy}, keywords = {Quantum Key Distribution (QKD), E91 protocol, Entanglement, CHSH inequality, Steganography, ChaCha20-Poly1305, Secure Hash Algorithm (SHA)}, }
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talks
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teaching
Lecturer, Department of Computer Science & Engineering
Lecturer, Dhaka International University, 2015
Served as a Lecturer in the Department of Computer Science & Engineering at Dhaka International University from September 2025 to June 2026.
Teaching Assistant
Undergraduate course, Temple University, Department of Computer & Information Science, 2026
Teaching Assistant for CIS 1057: Programming in C at Temple University.