Quantum Cryptography Technique Using Multi-Qubit Control Gates

Quantum information processing and information exchange in the world of quantum computing demands novel methods, strategies and techniques based on quantum gates. Due to the facts that quantum computing is becoming more powerful and there are impactful scientific developments that would make quantum computers practical, post-quantum cryptography would require novel methods. In this sense, the paper presents a new approach or tool to be used in ciphering and deciphering information using multi-qubit control gates. This technique would be beneficial in terms of transforming information to another form and rebuilding it through asymmetric methods by the help of previously developed multi-qubit quantum gates. The underlying methodology of the technique is based on unitary transformations which may be divided into two parts: ciphering and deciphering parts. Moreover, controlling target qubits in accordance with the control qubit was also benefited within the methodology. In this sense, multi-qubit control gates, derived from mathematical model of universal control gates, play important role. Post-quantum cryptographic methods and strategies would be improved through this kind of methodologies.