The availability of NFC capabilities on smartphones has facilitated the development of a large number of related applications. Some of these applications may be resourceintensive tasks; and Cloudlets-based mobile computing are a good candidate to offload computation while being free of WAN delays, jitter, congestion, and failures. In this context, new use cases dedicated to NFC applications based on cloudlets are presented and a security protocol is proposed to authenticate the cloudlets by the mobile devices. The secure element of the mobile device is a trust environment used to store sensitive data and to perform cryptographic calculations.

The surge of the presence of personal mobile devices in multi-environment makes a significant attention to the mobile cloud computing (MCC). Along with this concern, security issues also appear as a barrier to prevent the propagation of this trend. This paper focuses on an important feature in many security protocols and application, which is the device attestation in the MCC.The existing remote attestation mechanisms are currently used in trusted computing environment such as binary attestation and property-based attestation. In this paper, by taking advantage of the combination of technologies and trends, such as trusted platform module, cloud computing, and bring your own device, we introduce property-based token attestation to secure the mobile user in the enterprise cloud environment. In order to accomplish a secure MCC environment, security threats need to be studied and acted accordingly, and therefore, we first represent the common threats and then explain a novel attestation schema for addressing these threats by providing security proofs. In addition, Scyther is in use to verify the correctness of our protocol.