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Due to increasing needs of Internet access through Smartphone's and smart pad's, it is essential to have service provider systems, which allows to access services through a variety of devices. In particular, this system is required to protect credential and personal information saved in each device, is need a more efficient and secure Consolidated Authentication Model (CAM) in order to authenticate a user and devices. This paper analyzes the current user authentication model for both user and device authentication and Securely Available CREDential (SACRED) standards. Furthermore, it is also the authors' intention to design N-screen based consolidated user authentication model that meets framework and protocol requirement of credentials and privacy protection requirements in a cloud computing environments.
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