diff --git a/yaml/xyz/openbmc_project/Attestation/ComponentIntegrity.interface.yaml b/yaml/xyz/openbmc_project/Attestation/ComponentIntegrity.interface.yaml
new file mode 100644
index 0000000..bc0b6dc
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+++ b/yaml/xyz/openbmc_project/Attestation/ComponentIntegrity.interface.yaml
@@ -0,0 +1,67 @@
+description: >
+    Implement to represent component integrity information acquired from a
+    secure authentication or measurement of the protected components. A trusted
+    component (e.g., iRoT or TPM) is typically involved to provide the info
+    using a security protocol (e.g., SPDM).
+
+properties:
+    - name: Enabled
+      type: boolean
+      default: false
+      description: >
+          An indication of whether security protocols are enabled for the
+          component.
+
+    - name: Type
+      type: enum[self.SecurityTechnologyType]
+      default: Unknown
+      flags:
+          - readonly
+      description: >
+          The type of security technology for the component.
+
+    - name: TypeVersion
+      type: string
+      flags:
+          - readonly
+      description: >
+          The version of the security technology. Human readable format, e.g.
+          "1.1" for SPDM.
+
+    - name: LastUpdated
+      type: uint64
+      flags:
+          - readonly
+      description: >
+          The date and time when information for the component was last updated.
+          Firmware update, device certificate change or other device state
+          change that leads to component integrity change should update this
+          date. It is represented in milliseconds since the UNIX epoch.
+
+associations:
+    - name: authenticating
+      description: >
+          Objects that implement ComponentIntegrity can implement the
+          "authenticating" association to provide a link to the target component
+          whose integrity this resource authenticates.
+      reverse_name: authenticated_by
+      required_endpoint_interfaces:
+          - xyz.openbmc_project.Inventory.Item
+
+enumerations:
+    - name: SecurityTechnologyType
+      description: >
+          The security technology used for the component.
+      values:
+          - name: OEM
+            description: >
+                OEM-specific. If it is neither SPDM nor TPM, tag it OEM.
+          - name: SPDM
+            description: >
+                Security Protocol and Data Model (SPDM) protocol.
+          - name: TPM
+            description: >
+                Trusted Platform Module (TPM).
+          - name: Unknown
+            description: >
+                Security technology not known yet.
diff --git a/yaml/xyz/openbmc_project/Attestation/IdentityAuthentication.interface.yaml b/yaml/xyz/openbmc_project/Attestation/IdentityAuthentication.interface.yaml
new file mode 100644
index 0000000..f469a45
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+++ b/yaml/xyz/openbmc_project/Attestation/IdentityAuthentication.interface.yaml
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+description: >
+    Implement to represent properties related to Identity Authentication using
+    SPDM protocol.
+
+properties:
+    - name: ResponderVerificationStatus
+      type: enum[self.VerificationStatus]
+      default: Unknown
+      description: >
+          The status of the verification of the identity of the component.
+
+associations:
+    - name: requester_identitified_by
+      description: >
+          Objects that implement IdentityAuthentication can implement the
+          "requester_identified_by" association to provide a link to the target
+          certificate that provides the requester's identity.
+      reverse_name: identifying_requester
+      required_endpoint_interfaces:
+          - xyz.openbmc_project.Certs.Certificate
+
+    - name: responder_identitified_by
+      description: >
+          Objects that implement IdentityAuthentication can implement the
+          "responder_identified_by" association to provide a link to the target
+          certificate that provides the responder's identity.
+      reverse_name: identifying_responder
+      required_endpoint_interfaces:
+          - xyz.openbmc_project.Certs.Certificate
+
+enumerations:
+    - name: VerificationStatus
+      description: >
+          The possible status of the verification.
+      values:
+          - name: Failed
+            description: >
+                Unsuccessful verification.
+          - name: Success
+            description: >
+                Successful verification.
+          - name: Unknown
+            description: >
+                Status not known yet.
diff --git a/yaml/xyz/openbmc_project/Attestation/MeasurementSet.interface.yaml b/yaml/xyz/openbmc_project/Attestation/MeasurementSet.interface.yaml
new file mode 100644
index 0000000..ccb5312
--- /dev/null
+++ b/yaml/xyz/openbmc_project/Attestation/MeasurementSet.interface.yaml
@@ -0,0 +1,62 @@
+description: >
+    Implement to represent properties related to SPDM Measurements set.
+
+methods:
+    - name: SPDMGetSignedMeasurements
+      description: >
+          This method generates an SPDM cryptographic signed statement over the
+          given nonce and measurements of the SPDM Responder.
+
+      parameters:
+          - name: MeasurementIndices
+            type: array[size]
+            description: >
+                An array of indices that identify the measurement blocks to
+                sign.
+
+          - name: Nonce
+            type: string
+            description: >
+                A 32-byte hex-encoded string to be signed with the measurements.
+                The value should be unique.
+
+          - name: SlotId
+            type: size
+            description: >
+                The slot identifier for the certificate containing the private
+                key to generate the signature over the measurements.
+
+      returns:
+          - name: Certificate
+            type: object_path
+            description: >
+                Certificate corresponding to the SPDM slot identifier that can
+                be used to validate the signature.
+          - name: HashingAlgorithm
+            type: string
+            description: >
+                The hashing algorithm used for generating the cryptographic
+                signed statement.
+          - name: PublicKey
+            type: string
+            description: >
+                A Privacy Enhanced Mail (PEM)-encoded public key that can be
+                used to validate the signature.
+          - name: SignedMeasurements
+            type: string
+            description: >
+                Base64 encoded cryptographic signed statement generated by the
+                signer.
+          - name: SigningAlgorithm
+            type: string
+            description: >
+                The asymmetric signing algorithm used for generating the
+                cryptographic signed statement.
+          - name: Version
+            type: string
+            description: >
+                The SPDM version used by the SPDM Responder to generate the
+                cryptographic signed statement.
+      errors:
+          - xyz.openbmc_project.Common.Error.InvalidArgument
+          - xyz.openbmc_project.Common.Error.InternalFailure