diff --git a/test/commonfuzztest/authenticatedeviceservice_fuzzer/authenticate_device_service_fuzzer.cpp b/test/commonfuzztest/authenticatedeviceservice_fuzzer/authenticate_device_service_fuzzer.cpp
index f2653de5f87234b46501f653f263bd9a3c0fcea0..a3e40ec26c9748b572722b0d1156deb9fddeab6f 100644
--- a/test/commonfuzztest/authenticatedeviceservice_fuzzer/authenticate_device_service_fuzzer.cpp
+++ b/test/commonfuzztest/authenticatedeviceservice_fuzzer/authenticate_device_service_fuzzer.cpp
@@ -57,16 +57,13 @@ void AuthenticateDeviceServiceFuzzTest(const uint8_t* data, size_t size)
     }
 
     AddPermission();
-    std::string pkgName(reinterpret_cast<const char*>(data), size);
-    std::string extra(reinterpret_cast<const char*>(data), size);
-    std::string deviceId(reinterpret_cast<const char*>(data), size);
-    std::string udid;
-    std::string network;
-    std::string device;
-    int32_t authType = 1;
-    DmAuthParam authParam;
-    std::vector<DmDeviceBasicInfo> deviceBasicInfoList;
     FuzzedDataProvider fdp(data, size);
+    std::string pkgName = fdp.ConsumeRandomLengthString();
+    std::string extra = fdp.ConsumeRandomLengthString();
+    std::string deviceId = fdp.ConsumeRandomLengthString();
+    std::string udid = fdp.ConsumeRandomLengthString();
+    std::string network = fdp.ConsumeRandomLengthString();
+    int32_t authType = fdp.ConsumeIntegral<int32_t>();
     int32_t level = fdp.ConsumeIntegral<int32_t>();
     DeviceManagerService::GetInstance().Init();
     DeviceManagerService::GetInstance().AuthenticateDevice(pkgName, authType, deviceId, extra);
diff --git a/test/commonfuzztest/generateencrypteduuid_fuzzer/generate_encrypted_uuid_fuzzer.cpp b/test/commonfuzztest/generateencrypteduuid_fuzzer/generate_encrypted_uuid_fuzzer.cpp
index a9010dd1419f33de4b7bad69a2c7d4ae3ca01b94..65dbf9c10eb1d54f6c0f0fe7314c796e27d2b3f5 100644
--- a/test/commonfuzztest/generateencrypteduuid_fuzzer/generate_encrypted_uuid_fuzzer.cpp
+++ b/test/commonfuzztest/generateencrypteduuid_fuzzer/generate_encrypted_uuid_fuzzer.cpp
@@ -15,6 +15,7 @@
 
 #include "generate_encrypted_uuid_fuzzer.h"
 
+#include <fuzzer/FuzzedDataProvider.h>
 #include "device_manager_impl.h"
 
 namespace OHOS {
@@ -25,11 +26,12 @@ void GenerateEncryptedUuidFuzzTest(const uint8_t* data, size_t size)
     if ((data == nullptr) || (size == 0)) {
         return;
     }
+    FuzzedDataProvider fdp(data, size);
+    std::string pkgName = fdp.ConsumeRandomLengthString();
+    std::string uuid = fdp.ConsumeRandomLengthString();
+    std::string appId = fdp.ConsumeRandomLengthString();
+    std::string encryptedUuid = fdp.ConsumeRandomLengthString();
 
-    std::string pkgName(reinterpret_cast<const char*>(data), size);
-    std::string uuid(reinterpret_cast<const char*>(data), size);
-    std::string appId(reinterpret_cast<const char*>(data), size);
-    std::string encryptedUuid(reinterpret_cast<const char*>(data), size);
     DeviceManagerImpl::GetInstance().ipcClientProxy_ =
         std::make_shared<IpcClientProxy>(std::make_shared<IpcClientManager>());
     DeviceManagerImpl::GetInstance().GenerateEncryptedUuid(pkgName, uuid, appId, encryptedUuid);