6376 - Update to OCP Attestation Specification to improve interoperability through convergence on industry standards.pdf

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1、Improve Interoperability in OCP AttestationFabrizio Damato(AMD)Jeff Andersen(Google)Fabrizio Damato(AMD)Jeff Andersen(Google)Improve Interoperability in OCP Attestation“How can Data Centers achieve scalable and secure attestation without a converged reporting standard?”Interoperability Challenges in

2、 Attestation Vendor A Attestation ReportVendor B Attestation ReportVendor C Attestation ReportVendor D Attestation ReportCSP Remote VerifierOrchestratorDevice ADevice BDevice CDevice DOCP established Interoperability being a key element for an“Admissible Architecture”Composable Security Architecture

3、Breaking Down InteroperabilityInteroperabilityStandard InterfacesI3C/DOEStandard Protocol/APIs DMTF SPDM/MCTPStandard Evidence Report(s)?Goal:Converge on Attestation Report FormatDOE:Data Object ExchangeCBOR:Concise Binary Object RepresentationExtremely small code sizeFairly small message sizeExtens

4、ibility without the need for version negotiationCoRIM:Concise Reference Integrity ManifestA reference manifest of attested measurementsRepresented in CBORBuilding Blocks:CBOR and CoRIMTCG introduced“concise-evidence”CBOR based evidence format.The other half of CoRIM-produced by the deviceCrafted aro

5、und CoRIM semantics,can be easily verified against a CoRIMDMTF SPDM 1.3 introduced”Structured Manifest”measurement type.The concise-evidence binds with SPDM as a“Structured Manifest”payloadTCG DICE Binding for SPDM Concise EvidenceDeviceVerifierVendor EndorserSPDMTLSConcise evidenceIETF CoRIMTCGs“co

6、ncise-evidence”format does not include an embedded signing schemeChallenge:Verifier not an SPDM RequestorRemote VerifierConcise evidenceSPDM RequestorL1/L2 signatureL1/L2 signatureDevice(SPDM Responder)Verifier behind SPDM Requestor Server PlatformVMRoTRemote verifierConcise evidenceGuest Owner Atte