Quantum secure image encryption using Hybrid QTRNG and QPRNG

T. S. Gururaja, Padmapriya Praveenkumar

Zeng Lin, Yan Chang, XueJian Zhang +3 more

Jian Wang, Ya-Cong Geng, Lei Han +1 more

T. S. Gururaja, Padmapriya Praveenkumar

Secure image transmission has become critical in the emerging quantum computing landscape. This research introduces a hybrid key quantum encryption approach that combines Quantum True Random Number Generation (QTRNG) and Quantum Pseudo Random Number Generation (QPRNG) to enhance security and efficiency. The proposed Quantum Hybrid Random Number Generator (QHRNG) integrates entanglement-based true randomness with structured pseudo-randomness using Hadamard, controlled rotation and Clifford gates to generate high-entropy encryption keys. The generated Quantum keys are applied to encrypt grayscale images using the Novel Enhanced Quantum Image Representation (NEQR). The encryption process is strengthened by quantum bit-level scrambling and selective Quantum Fourier Transform. The proposed method is implemented on Qiskit’s Aer and Basic simulators and validated on IBM’s torino quantum hardware. Compared to standalone QTRNG and QPRNG methods, QHRNG consistently provides higher randomness and stronger security in noisy and noiseless environments. This work offers a robust and future-ready framework for quantum secure image encryption.

Jinlei Zhang, Zhijie Huang, Xiang Li +3 more

Sharranya Sridharan, T. S. Gururaja, Rengarajan Amirtharajan +1 more

Secure data communication is in growing demand in today's 6G era. Cryptographic schemes must be employed to protect the data over the air and facilitate secure communication. This paper proposes a novel quantum image encryption algorithm with Quantum True Random Number Generation (QTRNG) and an image-dependent 6D hyperchaotic system to enhance security. RX and RZ quantum gates generated Quantum True Random key sequences by introducing an exponential phase shift to the input. The encryption process integrates multistage DNA encoding and QTRNG to develop the initial encrypted image, which is represented by Novel Enhanced Quantum Representation (NEQR). The encrypted image is hashed using SHA-384 to generate 6D keys, followed by Quantum Fibonacci and bit-level scrambling to perform further quantum encryption. This process is repeated over three stages, each employing different hyperchaotic keys, DNA rules, and operations. The encryption metrics confirm the algorithm's reliability and robustness regarding security.