Chinese companies have begun competing with Western companies in the cloud computing and data storage market. The “cloud war” is taking place as the dispute between the United States and China about data hacking and computer network security grows stronger. Chinese companies such as Alibaba, Baidu and Huawei are expanding within their country and gaining customers in other countries. At the same time, regulations against foreign companies in China make competing with those businesses difficult. The increasing competition in cloud computing and storage worries some experts. They are concerned about the security of information. After all, companies often use the cloud to store important, confidential information and to operate such activities as data-driven machinery, telecommunications, banking and transport systems -- including plans for driverless vehicles.