Introduction.- Preliminaries.- IDC-Based Authentication Scheme using Bilinear Pairings for V2I Communications.- IDC-Based Authentication Scheme using ECC for V2V Communications.- CLC-Based Authentication Scheme using Bilinear Pairings for V2I Communications.- CLC-Based Authentication Scheme using ECC for V2V Communications.- IDC to PKI-Based Hybrid Signcryption Scheme using Bilinear Pairings for Heterogeneous V2I Communications.