When user access to the cloud computing environment, existing security protocols merely
authenticate the identity of user and cloud server without considering their credibility of owning platforms.
Remote attestation of trusted computing is to provide security evidence of their own platform
for the both sides of communication accessed. Introducing the remote attestation mechanism into security
protocol can avoid terminal security vulnerability when user accessed. By constructing of trusted access authentication
framework using remote attestation mechanism, and a security protocol for trusted access to cloud environment is
proposed. The proposed protocol with greater security and efficiency compared to other corrective schemes through attack
resisting analysis and computational cost analysis, and proved secure using strand space model. Our scheme realizes two
factors identity authentication and platform authentication for Mobile User and Cloud Server, as well as satisfies the privacy
protection requirement of the platform configuration in cloud environment or cloud media digital rights management.
Keywords: Cloud computing, digital rights management, formal proof, remote attestation, security protocol, strand space model.
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