diff --git a/sdk/keyvault/azure-security-keyvault-keys/CHANGELOG.md b/sdk/keyvault/azure-security-keyvault-keys/CHANGELOG.md
index e691abb56..793814a6d 100644
--- a/sdk/keyvault/azure-security-keyvault-keys/CHANGELOG.md
+++ b/sdk/keyvault/azure-security-keyvault-keys/CHANGELOG.md
@@ -5,6 +5,7 @@
 ### Features Added
 
 - Added `GetIv()` to `EncryptParameters` and `DecryptParameters`.
+- Added `BackupKeyResult` for `BackupKey()` return type.
 
 ### Breaking Changes
 
@@ -17,6 +18,7 @@
 - Removed `Decrypt(DecryptAlgorithm, std::vector, context)`.
 - Removed the `MaxPageResults` field from `GetPropertiesOfKeysOptions`, `GetPropertiesOfKeyVersionsOptions`, and `GetDeletedKeysOptions`.
 - Renamed header `list_keys_single_page_result.hpp` to `list_keys_responses.hpp`.
+- Updated `BackupKey()` API return type to `BackupKeyResult` model type.
 
 ## 4.0.0-beta.3 (2021-06-08)
 
diff --git a/sdk/keyvault/azure-security-keyvault-keys/CMakeLists.txt b/sdk/keyvault/azure-security-keyvault-keys/CMakeLists.txt
index 415576796..beaf4eca1 100644
--- a/sdk/keyvault/azure-security-keyvault-keys/CMakeLists.txt
+++ b/sdk/keyvault/azure-security-keyvault-keys/CMakeLists.txt
@@ -46,6 +46,7 @@ set(
     inc/azure/keyvault/keys/internal/cryptography/local_cryptography_provider.hpp
     inc/azure/keyvault/keys/internal/cryptography/remote_cryptography_client.hpp
     inc/azure/keyvault/keys/internal/cryptography/rsa_cryptography_provider.hpp
+    inc/azure/keyvault/keys/backup_key_result.hpp
     inc/azure/keyvault/keys/delete_key_operation.hpp
     inc/azure/keyvault/keys/deleted_key.hpp
     inc/azure/keyvault/keys/import_key_options.hpp
diff --git a/sdk/keyvault/azure-security-keyvault-keys/inc/azure/keyvault/keys/backup_key_result.hpp b/sdk/keyvault/azure-security-keyvault-keys/inc/azure/keyvault/keys/backup_key_result.hpp
new file mode 100644
index 000000000..9d73f167b
--- /dev/null
+++ b/sdk/keyvault/azure-security-keyvault-keys/inc/azure/keyvault/keys/backup_key_result.hpp
@@ -0,0 +1,29 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+/**
+ * @file
+ * @brief Defines the BackupKey model type.
+ *
+ */
+
+#pragma once
+
+#include <vector>
+
+namespace Azure { namespace Security { namespace KeyVault { namespace Keys {
+
+  /**
+   * @brief The BackupKeyResult type containing the backup key of bytes.
+   *
+   */
+  struct BackupKeyResult final
+  {
+    /**
+     * @brief The backup key array data.
+     *
+     */
+    std::vector<uint8_t> BackupKey;
+  };
+
+}}}} // namespace Azure::Security::KeyVault::Keys
diff --git a/sdk/keyvault/azure-security-keyvault-keys/inc/azure/keyvault/keys/key_client.hpp b/sdk/keyvault/azure-security-keyvault-keys/inc/azure/keyvault/keys/key_client.hpp
index 52313d933..19930861e 100644
--- a/sdk/keyvault/azure-security-keyvault-keys/inc/azure/keyvault/keys/key_client.hpp
+++ b/sdk/keyvault/azure-security-keyvault-keys/inc/azure/keyvault/keys/key_client.hpp
@@ -11,6 +11,7 @@
 
 #include <azure/keyvault/common/internal/keyvault_pipeline.hpp>
 
+#include "azure/keyvault/keys/backup_key_result.hpp"
 #include "azure/keyvault/keys/delete_key_operation.hpp"
 #include "azure/keyvault/keys/import_key_options.hpp"
 #include "azure/keyvault/keys/key_client_options.hpp"
@@ -341,7 +342,7 @@ namespace Azure { namespace Security { namespace KeyVault { namespace Keys {
      * @param name The name of the key.
      * @param context A #Azure::Core::Context controlling the request lifetime.
      */
-    Azure::Response<std::vector<uint8_t>> BackupKey(
+    Azure::Response<Azure::Security::KeyVault::Keys::BackupKeyResult> BackupKey(
         std::string const& name,
         Azure::Core::Context const& context = Azure::Core::Context()) const;
 
diff --git a/sdk/keyvault/azure-security-keyvault-keys/src/key_client.cpp b/sdk/keyvault/azure-security-keyvault-keys/src/key_client.cpp
index 8883898a2..aef67191b 100644
--- a/sdk/keyvault/azure-security-keyvault-keys/src/key_client.cpp
+++ b/sdk/keyvault/azure-security-keyvault-keys/src/key_client.cpp
@@ -320,7 +320,7 @@ Azure::Response<KeyVaultKey> KeyClient::UpdateKeyProperties(
       {_detail::KeysPath, properties.Name, properties.Version});
 }
 
-Azure::Response<std::vector<uint8_t>> KeyClient::BackupKey(
+Azure::Response<Azure::Security::KeyVault::Keys::BackupKeyResult> KeyClient::BackupKey(
     std::string const& name,
     Azure::Core::Context const& context) const
 {
@@ -334,8 +334,9 @@ Azure::Response<std::vector<uint8_t>> KeyClient::BackupKey(
       {_detail::KeysPath, name, "backup"});
 
   // Convert the internal KeyBackup model to a raw vector<uint8_t>.
-  return Azure::Response<std::vector<uint8_t>>(
-      response.Value.Value, std::move(response.RawResponse));
+  return Azure::Response<Azure::Security::KeyVault::Keys::BackupKeyResult>(
+      Azure::Security::KeyVault::Keys::BackupKeyResult{response.Value.Value},
+      std::move(response.RawResponse));
 }
 
 Azure::Response<KeyVaultKey> KeyClient::RestoreKeyBackup(
diff --git a/sdk/keyvault/azure-security-keyvault-keys/test/samples/sample2-backup-and-restore/sample2_backup_and_restore.cpp b/sdk/keyvault/azure-security-keyvault-keys/test/samples/sample2-backup-and-restore/sample2_backup_and_restore.cpp
index 63696f5d5..fc6512eb8 100644
--- a/sdk/keyvault/azure-security-keyvault-keys/test/samples/sample2-backup-and-restore/sample2_backup_and_restore.cpp
+++ b/sdk/keyvault/azure-security-keyvault-keys/test/samples/sample2-backup-and-restore/sample2_backup_and_restore.cpp
@@ -54,7 +54,7 @@ int main()
     size_t backUpSize = 0;
     {
       std::cout << "\t-Backup Key" << std::endl;
-      std::vector<uint8_t> backupKey(keyClient.BackupKey(rsaKeyName).Value);
+      std::vector<uint8_t> backupKey(keyClient.BackupKey(rsaKeyName).Value.BackupKey);
       backUpSize = backupKey.size();
 
       // save data to file
diff --git a/sdk/keyvault/azure-security-keyvault-keys/test/ut/key_client_backup_test_live.cpp b/sdk/keyvault/azure-security-keyvault-keys/test/ut/key_client_backup_test_live.cpp
index 7ccfde99e..bb767466d 100644
--- a/sdk/keyvault/azure-security-keyvault-keys/test/ut/key_client_backup_test_live.cpp
+++ b/sdk/keyvault/azure-security-keyvault-keys/test/ut/key_client_backup_test_live.cpp
@@ -61,7 +61,7 @@ TEST_F(KeyVaultClientTest, BackupKey)
   {
     // Restore
     std::cout << std::endl << "- Restore key";
-    auto respone = keyClient.RestoreKeyBackup(backUpResponse.Value);
+    auto respone = keyClient.RestoreKeyBackup(backUpResponse.Value.BackupKey);
     CheckValidResponse(backUpResponse);
   }
   {