Server Error in '/' Application.

Padding is invalid and cannot be removed.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Security.Cryptography.CryptographicException: Padding is invalid and cannot be removed.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[CryptographicException: Padding is invalid and cannot be removed.]
   System.Security.Cryptography.CapiSymmetricAlgorithm.DepadBlock(Byte[] block, Int32 offset, Int32 count) +275
   System.Security.Cryptography.CapiSymmetricAlgorithm.TransformFinalBlock(Byte[] inputBuffer, Int32 inputOffset, Int32 inputCount) +301
   System.Security.Cryptography.CryptoStream.FlushFinalBlock() +50
   System.Security.Cryptography.CryptoStream.Dispose(Boolean disposing) +54
   System.IO.Stream.Close() +26
   AABUResp.Webparts.ProfessorDetails.ProfessorDetailsUserControl.Decrypt(String cipherText) +630
   AABUResp.Webparts.ProfessorDetails.ProfessorDetailsUserControl.GetProfessors(String Sub, String lstName) +287
   AABUResp.Webparts.ProfessorDetails.ProfessorDetailsUserControl.Page_Load(Object sender, EventArgs e) +144
   System.Web.UI.Control.OnLoad(EventArgs e) +86
   System.Web.UI.Control.LoadRecursive() +129
   System.Web.UI.Control.AddedControl(Control control, Int32 index) +642
   AABUResp.Webparts.ProfessorDetails.ProfessorDetails.CreateChildControls() +358
   System.Web.UI.Control.EnsureChildControls() +130
   System.Web.UI.Control.PreRenderRecursiveInternal() +66
   System.Web.UI.Control.PreRenderRecursiveInternal() +276
   System.Web.UI.Control.PreRenderRecursiveInternal() +276
   System.Web.UI.Control.PreRenderRecursiveInternal() +276
   System.Web.UI.Control.PreRenderRecursiveInternal() +276
   System.Web.UI.Control.PreRenderRecursiveInternal() +276
   System.Web.UI.Control.PreRenderRecursiveInternal() +276
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +6881


Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.8.4110.0