AlHrazi, Firdaus, Malek Algabri, and Abdualmajed Ahmed Al-Khulaidi. 2023. “Hierarchical Blockchain As Line Defense of Attacks to Messages Propagation in VANET”. Sana’a University Journal of Applied Sciences and Technology 1 (3). https://doi.org/10.59628/jast.v1i3.370.