ASPA: Advanced Strong Pseudonym based Authentication in Intelligent Transport System

• Published in: PloS one Vol. 14; no. 8; p. e0221213
• Main Authors: Ali, Qazi Ejaz, Ahmad, Naveed, Malik, Abdul Haseeb, Rehman, Waheed Ur, Din, Aziz Ud, Ali, Gauhar
• Format: Journal Article
• Language: English
• Published: United States Public Library of Science 22.08.2019; Public Library of Science (PLoS)
• Subjects: Accidents, Traffic - prevention & control; Ad hoc networks; Advertising executives; Anonyms and Pseudonyms; Authentication; Authentication (Identity); Automobile safety; Automobiles - legislation & jurisprudence; Biology and Life Sciences; Communications traffic; Computer and Information Sciences; Computer applications; Computer science; Computer Security; Embedded systems; Engineering and Technology; Humans; Incorporation; Intelligent transportation systems; Latency; Mapping; Methods; Networking standards; Physical Sciences; Preservation; Privacy; Research and Analysis Methods; Road construction industry; Securities analysis; Security; Social Sciences; Traffic accidents & safety; Traffic safety; Transportation - ethics; Trustworthiness; Vehicles; Wi-Fi; Wireless communications; Wireless LANs; Wireless networks; Wireless Technology - ethics; Pakistan; Peshawar Pakistan
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0221213

Intelligent Transport System (ITS) uses the IEEE 802.11P standard for the wireless communication among vehicles. A wireless ad hoc network of vehicles is established to improve road safety, comfort, security, and traffic efficiency. Wireless communication in ITS leads to many security and privacy challenges. Security and privacy of ITS are important issues that demand incorporation of confidentiality, privacy, authentication, integrity, non-repudiation, and restrictive obscurity. In order to ensure the privacy of vehicles during communication, it is required that the real identity of vehicles should not be revealed. There must be robust and efficient security and privacy mechanisms for the establishment of a reliable and trustworthy network. Therefore, we propose Advanced Strong Pseudonym based Authentication (ASPA), which is a distributed framework to handle the security and privacy issues of vehicle communications in ITS. ASPA only allows vehicles with valid pseudonyms to communicate in ITS. Pseudonyms are assigned to vehicles in a secure manner. The pseudonym mappings of vehicles are stored at different locations to avoid any chance of vehicle pseudonyms certificates linkability. In addition, the most recent communication pseudonyms of a malicious vehicle are revoked and are stored in the Certificate Revocation List (CRL) that results in small size of the CRL. Therefore, the CRL size does not increase exponentially. The distributed framework of ASPA guarantees, the vehicles privacy preservation in the real identities mapping and revocation phase. The empirical results prove that ASPA is robust and efficient with low computational cost, overhead ratio, average latency, and an increased delivery ratio.