Abstract
With the diversification of location-based services in vehicle networks, users can obtain such services through submitting searching locations and points of interest. However, users may worry that their real locations and other privacy information will leak out when they get such services, so appropriate location privacy protection measures are necessary. Traditional location privacy protection, such as K-anonymous, cannot be carried out directly because of the characteristics of vehicle networks, such as high mobility. In order to solve such problems, this article proposes a strategy combining cache strategy with K-anonymous that can not only satisfy users' demand on obtaining required services with lowest cost, but also protect the location privacy of users. Specifically, on one hand, cache strategy that deploys part of services on roadside units in advance is used to maximize the satisfaction of users' service requests. On the other hand, each user is set with a K value to meet the need of K-anonymous. The trade-off of these two aspects guarantees users' services and the location privacy. The experiments show that the strategy proposed in this article is better than other strategies.