Quantum Computing for Cybersecurity: Exploring Secure Systems and Cryptographic Innovation with IBM Quantum Composer & Qiskit provides a comprehensive introduction to the intersection of quantum computing and cybersecurity. Combining foundational theory with hands-on practice, the book explores quantum mechanics, qubits, quantum algorithms, cryptography, Quantum Key Distribution (QKD), and Post-Quantum Cryptography (PQC). Through practical experiments using IBM Quantum Composer and Qiskit, readers gain valuable skills in quantum circuit design and analysis. Designed for students, researchers, developers, and cybersecurity professionals, this book equips readers with the knowledge needed to understand, secure, and innovate in the emerging quantum era.