Abstract: In cloud computing,the resources of service are widely distributed and migrated frequently．The trust relationship between them is hard to establish and maintain．There are some problems for traditional remote attestation based on trust computing,such as performance bottleneck and computational-complexity.This article proposed a novel remote attestation mechanism based on property negotiation in cloud computing．According to the ring signature algorism and sensitive property-based protection,this mechanism promotes the computational efficiency and reduces the leakage risk of sensitive property．Security of the mechanism is verified by security model．Validity and feasibility are tested by the experiment on Hadoop platform.

Key words: Cloud computing,Trust computing,Remote attestation,Ring signature,Automated trust negotiation