The　remote　attestation　mechanism　serves　to　prove　the　trusted　state　of　remote　platform　to　a　local　user,　and　TPM　is　always　the　bottleneck　of　remote　attestation　efficiency.　There　are　some　improvement　methods　on　remote　attestation　scalability　at　present.　However,　the　existing　methods　have　the　problems　such　as　lack　of　privacy　protection,　vendor　discrimination,　and　marked　increase　of　communication　load.　And　in　order　to　solve　these　problems,　a　Property-based　Scalable　Remote　Attestation　method　(PSRA)　is　proposed　in　this　paper.　PSRA　imports　attest　proxy　to　protect　the　configuration　privacy　of　platform　and　uses　ring　buffer　and　Merkle　tree　to　improve　the　efficiency　of　remote　attestation.　In　this　paper,　the　PSRA　overall　structure　is　presented,　and　a　Property-based　Scalable　Remote　Attestation　Protocol　is　designed.　Under　the　premise　of　both　sides　trusting　on　the　attest　proxy,　the　protocol　could　attest　to　the　remote　platform＇s　security　property　for　the　requestor　without　leak　of　remote　platform＇s　configuration　information.　Further,　a　performance　comparison　between　several　improvement　methods　on　remote　attestation　scalability　is　given　based　on　an　experiment　on　a　specific　scenario.　It＇s　proved　that　PSRA　has　advantages　on　aspects　of　average　response　time　and　communication　load　compared　with　existing　method,　and　could　also　protect　the　platform　the　configuration　privacy　effectively.　©2009　IEEE.