diff --git a/Src/Dlhis.Basic/Organization/Services/Implements/GainfoFaceService.cs b/Src/Dlhis.Basic/Organization/Services/Implements/GainfoFaceService.cs
index b7754a96..5080477d 100644
--- a/Src/Dlhis.Basic/Organization/Services/Implements/GainfoFaceService.cs
+++ b/Src/Dlhis.Basic/Organization/Services/Implements/GainfoFaceService.cs
@@ -45,6 +45,16 @@ public class GainfoFaceService : IGainfoFaceService
 
     public async Task UploadExternalFaceAsync(GainfoUploadFaceRequest request)
     {
+        var protector = _dataProtectionProvider.CreateProtector("gainfo:external:idno");
+        try
+        {
+            request.UserNo = protector.Unprotect(request.UserNo);
+        }
+        catch (Exception)
+        {
+            throw new UserFriendlyException("凭证有误,无法获取人脸数");
+        }
+
         var gainfo = await _gainfoStore.Queryable(GainfoStatusEnumType.External).Where(x => x.No == request.UserNo).FirstAsync();
         gainfo.ThrowIfNull("人员信息不存在");