  The intelligent vehicle (IV) has become a promising technology that could
revolutionize our life in smart cities sooner or later. However, it yet suffers
from many security vulnerabilities. Traditional security methods are incapable
to secure the IV data sharing against malicious attacks. Blockchain, as
expected by both research and industry communities, has emerged as a good
solution to address these issues. The major issues in IV data sharing are
trust, data accuracy and reliability of data sharing in the communication
channel. Blockchain technology, previously working for the cryptocurrency, has
recently applied to build trust and reliability in peer-to-peer networks with
similar topologies of IV data sharing. In this chapter, we present a new
framework, namely biometric blockchain (BBC), for secure IV data sharing. In
our new scheme, biometric information is exploited as a cue to record who is
responsible in the data sharing activities, while the proposed BBC technology
serves as the backbone of the IV data-sharing architecture. Hence, the proposed
BBC technology provides a more reliable trust environment between the vehicles
while personal identities are traceable in the proposed new scheme.
