Mobile-based continuous user authentication system for cloud security

Recently, Cloud based services have become very popular, and many people are willing to use cloud services because of their convenience. For instance, people would like to store their files in the cloud storage, and the files may contain important data or private information. If important files are accessed by unauthorized users due to unsecure cloud services, it may cause financial losses and people may be unwilling to use cloud services. Consequently, how to increase security of cloud services is quite important for the services to be successful and used widely. In addition, mobile devices have become more and more popular, and one of the main accessing devices to cloud services is mobile devices. In this paper, we propose a mobile-based continuous user authentication system to protect cloud service users.