  We introduce a hash chain-based secure cluster. Here, secure cluster refers
to a set of vehicles having vehicular secrecy capacity of more than a reference
value. Since vehicle communication is performed in such a secure cluster,
basically secure vehicle communication can be expected. Secure hash clusters
can also be expected by sharing hash chains derived from vehicle identification
numbers. We are also convinced that our paper is essential for future
autonomous vehicles by providing secure clustering services using MEC. In the
near term, autonomous driving, our paper makes it possible to expect strong and
practically safe vehicle communications.
