Fix CredSSP Encryption Oracle Remediation Error

It is quite frustrating when you get CredSSP Encryption Oracle Remediation error when you try to RDP to a Windows Computer. I got the same error when I try to establish a remote desktop connection to my Virtual Private Server running on Windows Server 2012. After spending a few hours on it, I got to know the reason of why my Windows 10 computer is popping an error after the recent Windows update. Later I found some workaround to fix this CredSSP Encryption Oracle Remediation error by doing few tweaks at the group policy editor or to the registry. Let me share with you all the solution to bypass CredSSP Encryption Oracle Remediation.

CredSSP Encryption Oracle Remediation Error

What does CredSSP Encryption Oracle Remediation mean?

The actual error you see when you connect to the RDP connection is

An authentication error has occurred.
The function requested is not supported.
Remote Computer: 192.168.1.1
This could be due to CredSSP encryption oracle remediation.
For more information, see



Before seeing the actual fix, it is good to know the reason why we get this kind of error when connecting to the RDP connection.

Generally, in my case, I’m using the old version of the Windows operating system on my VPS. When I connect to my VPS from my personal computer which is on Windows 10 Pro, we naturally see this error. The authentication error is because of the operating system compatibility. When the destination computer you are connecting to is up-to-date, then you never see this encryption error.

So, now we’re are bypassing this restriction by enabling few settings. This is really simple to do. Let’s patch it up!

CredSSP Encryption Oracle Remediation Group Policy

If you have access to group policy editor, then you can use this method. This works really well when you try to connect to AWS, Azure VM or any VPS machine through Windows 10 1803, 7, 8.1, 2008, 2016, etc.

Step 1: Use Windows or Cortana search to find Group Policy Editor.

group policy editor

Step 2: Once you have the editor, expand ‘Administrative Templates’ then ‘System’ and here choose ‘Credentials Delegation.’

Local Group Policy Editor Settings

Step 3: Now choose ‘Edit policy Settings’ then ‘Enable’ it and change the protection level to ‘Vulnerable.’

Fix CredSSP Encryption Oracle Remediation

Step 4: Finally, apply the settings then try to connect through the RDP.

This is how you can fix CredSSP Encryption Oracle Remediation by modifying Group policy settings. If you don’t have a group policy editor, then check the second method.

Fix CredSSP Encryption Oracle Remediation via RegEdit Setting

This resolution works well if you are using Windows 10 Home Edition where some of the core features are not available for users. So, let’s see how we can disable this error.

Step 1: Search for ‘regedit’ using Cortana search.

regedit

Step 2: Now expand ‘HKEY_LOCAL_MACHINE’ then ‘Software’ then ‘Microsoft’ then ‘Windows’ then ‘CurrentVersion’ then ‘Policies’ then ‘System.’

Step 3: Here you need to create a new Key. So, right click on the ‘System’ folder then choose ‘New Key’ and name it as CredSSP. Again create another ‘Key’ within CredSSP with the name ‘Parameters.’ This look exactly like in the below image.

credssp regedit

Step 4: Inside the Parameters, you need to create a new DWORD value and name it as ‘AllowEncryptionOracle’. Finally, change the DWORD value to 2 and Base to ‘Decimal.’

AllowEncryptionOracle

That is it. Now you can try connecting to the RDP from any version of Windows with getting any error like CredSSP Encryption Oracle Remediation.

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