A Quantum-Enhanced Key Agreement and Signature Protocol for Securing Transportation Cyber-Physical Systems. - Sahaya Beni Prathiba; Saikiran Sankaranarayanan; Rampriya Rajendran Shanthi; Dhanalakshmi Ranganayakulu; Arikumar K. Selvaraj; Joel J. P. C. Rodrigues (IEEE Trans. Intell. Transp. Syst., 2026)