When connecting to a remote desktop via Remote Desktop Protocol ( RDP ), you may see this error message on your computer stating: " An authentication error has occurred. This could be due to the Oracle fix of CredSSP encryption ". This error statement appears either due to incorrect policy settings or corrupted registry issues. If you encounter similar issues, follow these fixes to resolve the issue.
Fix - Customize group policy settings
Adjust the group policy settings on your computer to resolve the issue.
1. Press Windows key+R at the same time to open the Run window on your computer.
2. In the Run window , type " gpedit.msc ". Now click “ OK ” to open Local Group Policy Editor .
3. Once the Local Group Policy Editor window opens, on the left side go here-
User Configuration > Administrative Templates > System > Credentials Delegation
4. On the right side, scroll down and double click " Encryption Oracle Remediation " to change it.
6. Now set the settings to Enabled to enable the policy.
7. In the same way, set "Protection level 1" to " at risk ".
8. Finally, click " Apply " and then click " OK " to save the changes to your computer.
Close the Group Policy Editor window .
Try connecting to the RDP connection again. You can do it.
Fix-2 Edit registry settings-
If changing the policy settings didn't work, editing the registry settings on your computer might solve the problem.
1. Click the Search box and then type " regedit ".
2. Then you need to press " Enter " on your keyboard to access the registry.
3. Now expand the folders in this way-
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System
4. Then right click on a space on the right side and then click on " New> " and then on " Key ".
5. Name the new key " CredSSP ".
6. Now right click on " CredSSP " on the left panel and then click on " New> " and then click on " Key ".
7. Name the new subkey " Parameter ".
8. In the same way, on the right side , right- click on a space and then click " New>" and then " DWORD (32-bit) Value ".
9. Name the new DWORD value " AllowEncryptionOracle ".
10. Next , double click on the AllowEncryptionOracle Dword value to change it.
11. In the Edit DWORD (32-bit) Value window, set the "Base" to " Decimal ".
12. Now set the " Value Data " to " 2 ".
13. Click " OK " to save the changes to your computer.
Close the Registry Editor window .
Restart your computer.
After restarting your computer, try to connect to the RDP connection again.
Your problem is solved.
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