Inner exception: "The client and server cannot communicate, because they do not possess a common algorithm"

    Applies to:
  • Legacy SecureAuth IdP
Deployment model:
  • On Premises
  • SecureAuth IdP Version affected: Pre 8.1


    User receiving the red License Expiration notification at the bottom of the SecureAuth Admin page.

    1. Open the SecureAuth administrative interface.
    2. In the navigation bar, click the Admin Realm link.
    3. Select SecureAuth0 and then navigate to the System Info tab.
    4. Locate WSE 3.0 / WCF Configuration section > Trx Log Service URL field.
    5. Click the Test button to initiate a test to the SecureAuth Cloud Transaction Service.

    6. Message is presented:
    Failed! Exception: SOAP security negotiation failed. See inner exception for more details. Inner exception: The client and server cannot communicate, because they do not possess a common algorithm



    TLS 1.0 Needs to be enabled on the SecureAuth Server.


    Use these instructions to enable the TLS 1.0 protocol.

    1. Launch the SecureAuth Crypto Tool at D:\MFCApp_Bin\Extras\CryptoTool\CryptoTool.bat
    The splash page for the tool appears. The page advances automatically in 5 seconds, or the spacebar can be pressed to advance manually.

    2. If the terms are accepted, type AGREE at the prompt and press Enter. If the terms are not accepted, press Enter and the script exits automatically.

    The Main Menu opens.
    3. In the Main Menu, type 1 and press Enter.

    The Registry will now be updated.

    The configuration change is now complete.

    The appliance must be rebooted for the changes to take effect.

    CryptoTool can be Downloaded here:

    Install Steps:

    1. Download the Crypto Tool to the SecureAuth IdP appliance.
    2. Navigate to the download, right-click on the archive, select Properties, and view the General tab.
    3. If the Unblock button is present in the tab, click it then press OK to dismiss the Properties window.
    4. Right-click the archive file again and select Extract All.
    5. Extract the archive to D:\MFCApp_Bin\Extras.



    SecureAuth Knowledge Base Articles provide information based on specific use cases and may not apply to all appliances or configurations. Be advised that these instructions could cause harm to the environment if not followed correctly or if they do not apply to the current use case.

    Customers are responsible for their own due diligence prior to utilizing this information and agree that SecureAuth is not liable for any issues caused by misconfiguration directly or indirectly related to SecureAuth products.

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