diff --git a/virtualizationservice/aidl/android/system/virtualizationcommon/Certificate.aidl b/virtualizationservice/aidl/android/system/virtualizationcommon/Certificate.aidl
new file mode 100644
index 0000000..d587541
--- /dev/null
+++ b/virtualizationservice/aidl/android/system/virtualizationcommon/Certificate.aidl
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.system.virtualizationcommon;
+
+/**
+ * This encodes a X.509 certificate returned in the pVM remote attestation.
+ */
+parcelable Certificate {
+    /**
+     * Contains the bytes of a DER-encoded X.509 certificate.
+     */
+    byte[] encodedCertificate;
+}
diff --git a/virtualizationservice/aidl/android/system/virtualizationservice_internal/IVirtualizationServiceInternal.aidl b/virtualizationservice/aidl/android/system/virtualizationservice_internal/IVirtualizationServiceInternal.aidl
index 099a2c0..2592135 100644
--- a/virtualizationservice/aidl/android/system/virtualizationservice_internal/IVirtualizationServiceInternal.aidl
+++ b/virtualizationservice/aidl/android/system/virtualizationservice_internal/IVirtualizationServiceInternal.aidl
@@ -15,6 +15,7 @@
  */
 package android.system.virtualizationservice_internal;
 
+import android.system.virtualizationcommon.Certificate;
 import android.system.virtualizationservice.AssignableDevice;
 import android.system.virtualizationservice.VirtualMachineDebugInfo;
 import android.system.virtualizationservice_internal.AtomVmBooted;
@@ -62,7 +63,7 @@
      * @return A sequence of DER-encoded X.509 certificates that make up the attestation
      *         key's certificate chain. The attestation key is provided in the CSR.
      */
-    byte[] requestAttestation(in byte[] csr);
+    Certificate[] requestAttestation(in byte[] csr);
 
     /**
      * Get a list of assignable devices.
diff --git a/virtualizationservice/aidl/android/system/virtualmachineservice/IVirtualMachineService.aidl b/virtualizationservice/aidl/android/system/virtualmachineservice/IVirtualMachineService.aidl
index 87d3056..3c60478 100644
--- a/virtualizationservice/aidl/android/system/virtualmachineservice/IVirtualMachineService.aidl
+++ b/virtualizationservice/aidl/android/system/virtualmachineservice/IVirtualMachineService.aidl
@@ -15,6 +15,7 @@
  */
 package android.system.virtualmachineservice;
 
+import android.system.virtualizationcommon.Certificate;
 import android.system.virtualizationcommon.ErrorCode;
 
 /** {@hide} */
@@ -52,5 +53,5 @@
      * @return A sequence of DER-encoded X.509 certificates that make up the attestation
      *         key's certificate chain. The attestation key is provided in the CSR.
      */
-    byte[] requestAttestation(in byte[] csr);
+    Certificate[] requestAttestation(in byte[] csr);
 }
diff --git a/virtualizationservice/src/aidl.rs b/virtualizationservice/src/aidl.rs
index 4daa0cf..2be2b19 100644
--- a/virtualizationservice/src/aidl.rs
+++ b/virtualizationservice/src/aidl.rs
@@ -18,6 +18,7 @@
 use crate::atom::{forward_vm_booted_atom, forward_vm_creation_atom, forward_vm_exited_atom};
 use crate::rkpvm::request_attestation;
 use android_os_permissions_aidl::aidl::android::os::IPermissionController;
+use android_system_virtualizationcommon::aidl::android::system::virtualizationcommon::Certificate::Certificate;
 use android_system_virtualizationservice::{
     aidl::android::system::virtualizationservice::AssignableDevice::AssignableDevice,
     aidl::android::system::virtualizationservice::VirtualMachineDebugInfo::VirtualMachineDebugInfo,
@@ -158,7 +159,7 @@
         Ok(cids)
     }
 
-    fn requestAttestation(&self, csr: &[u8]) -> binder::Result<Vec<u8>> {
+    fn requestAttestation(&self, csr: &[u8]) -> binder::Result<Vec<Certificate>> {
         check_manage_access()?;
         info!("Received csr. Requestting attestation...");
         if cfg!(remote_attestation) {
diff --git a/virtualizationservice/src/rkpvm.rs b/virtualizationservice/src/rkpvm.rs
index 443b280..8f1de6b 100644
--- a/virtualizationservice/src/rkpvm.rs
+++ b/virtualizationservice/src/rkpvm.rs
@@ -17,18 +17,23 @@
 //! serves as a trusted platform to attest a client VM.
 
 use android_hardware_security_rkp::aidl::android::hardware::security::keymint::MacedPublicKey::MacedPublicKey;
+use android_system_virtualizationcommon::aidl::android::system::virtualizationcommon::Certificate::Certificate;
 use anyhow::{bail, Context, Result};
 use service_vm_comm::{GenerateCertificateRequestParams, Request, Response};
 use service_vm_manager::ServiceVm;
 
-pub(crate) fn request_attestation(csr: &[u8]) -> Result<Vec<u8>> {
+pub(crate) fn request_attestation(csr: &[u8]) -> Result<Vec<Certificate>> {
     let mut vm = ServiceVm::start()?;
 
     // TODO(b/271275206): Send the correct request type with client VM's
     // information to be attested.
     let request = Request::Reverse(csr.to_vec());
     match vm.process_request(request).context("Failed to process request")? {
-        Response::Reverse(cert) => Ok(cert),
+        // TODO(b/271275206): Adjust the response type.
+        Response::Reverse(cert) => {
+            let cert = Certificate { encodedCertificate: cert };
+            Ok(vec![cert])
+        }
         _ => bail!("Incorrect response type"),
     }
 }