Error occurred during a cryptographic operation.

[sara_t]

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Error occurred during a cryptographic operation.

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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: Error occurred during a cryptographic operation.]
System.Web.Security.Cryptography.HomogenizingCrypt oServiceWrapper.HomogenizeErrors(Func`2 func, Byte[] input) +115
System.Web.Security.Cryptography.HomogenizingCrypt oServiceWrapper.Unprotect(Byte[] protectedData) +59
System.Web.Security.FormsAuthentication.Decrypt(St ring encryptedTicket) +9842250
CharmEshop.MvcApplication.FormsAuthentication_OnAu thenticate(Object sender, FormsAuthenticationEventArgs e) +146
System.Web.Security.FormsAuthenticationModule.OnAu thenticate(FormsAuthenticationEventArgs e) +9747291
System.Web.Security.FormsAuthenticationModule.OnEn ter(Object source, EventArgs eventArgs) +80
System.Web.SyncEventExecutionStep.System.Web.HttpA pplication.IExecutionStep.Execute() +136
System.Web.HttpApplication.ExecuteStep(IExecutionS tep step, Boolean& completedSynchronously) +69

[Moien Tajik]

همه ی راه حل های این لینک رو ببینید : http://stackoverflow.com/questions/25857577/error-occurred-during-a-cryptographic-operation-when-decrypting-forms-cookie