CredSSP encryption oracle remediation

 The error message you are encountering in Remote Desktop Connection is related to CredSSP encryption oracle remediation. This typically happens due to a mismatch between the CredSSP settings on the client and server.

Solution Steps:

Option 1: Update Windows on Both Client and Server

Ensure both the client (your PC) and the server (the remote machine) have the latest Windows updates installed. Microsoft released security patches for this issue.

Option 2: Change Local Group Policy (Easiest)

1. Press Win + R, type gpedit.msc, and press Enter.
2. Navigate to:

   pgsql
   Computer Configuration → Administrative Templates → System → Credentials Delegation
   

3. Find Encryption Oracle Remediation and double-click it.
4. Set it to Enabled.
5. Under Protection Level, select Vulnerable.
6. Click Apply and OK.
7. Restart your computer and try connecting again.

Option 3: Modify Windows Registry (If Group Policy is Not Available)

1. Press Win + R, type regedit, and press Enter.
2. Navigate to:

   sql
   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\CredSSP\Parameters
   

3. Locate the AllowEncryptionOracle key.
   • If it doesn't exist, create a DWORD (32-bit) Value named AllowEncryptionOracle.
4. Set the value to 2.
5. Restart your computer and try connecting again.

Option 4: Enable Network Level Authentication (NLA) on the Server

If you have access to the remote machine, enable NLA:

1. On the remote machine, right-click This PC → Properties.
2. Click Remote settings.
3. Under Remote Desktop, check "Allow connections only from computers running Remote Desktop with Network Level Authentication".
4. Click Apply → OK.

Final Check

After applying one of these fixes, try connecting again. If it still fails, verify that both systems are fully updated.