Issue for The error "Symmetric Key Derivation Function Version KDFv1 is invalid"

Issue for the error  "Symmetric Key Derivation Function Version KDFv1 is invalid" 

The error "AADSTS5000611: Symmetric Key Derivation Function Version KDFv1 is invalid" indicates that your device is using an outdated and unsupported cryptographic algorithm (KDFv1) for authentication with Azure AD. To resolve this, you need to update your device with the latest Windows updates and security patches including MS Office online update.

The “Symmetric Key Derivation Function version ‘KDFV1’ is invalid” error means that your device or software is trying to use an older and now unsupported cryptographic algorithm called KDFv1 for key derivation. A key derivation function (KDF) is a security algorithm used to generate encryption keys from a secret source like a password or master key. KDFv1 is an older version that Microsoft is phasing out for security reasons, so newer updates might reject it to keep your system safe.

To resolve this, your device needs to move to a more current supported version of the key derivation function, which often means installing the latest Windows updates or security patches. If your system can’t upgrade fully (like to Windows 10 22H2), that might prevent the fix from working, which is why updating the OS is usually recommended for security compliance.

If updating the entire Windows version isn’t an option now, you can try to install the latest patches for your current version from Microsoft to see if they improve support. Otherwise, making space to allow a full update could be necessary.

Symmetric Key Derivation Function (KDFv1)

• K

  A KDF is a security algorithm used to generate encryption keys from a secret source like a password or master key. 
• KDFv1:

  This is an older version of the KDF that Microsoft is phasing out due to security concerns. 
• Error Cause:

  When your device attempts to authenticate with Azure AD, it might still try to use the older KDFv1, leading to this error. 
• Solution:

  Updating your device to the latest version of Windows (preferably Windows 10 22H2 or later, or Windows 11) and applying all available cumulative updates will ensure you're using a supported KDF and resolve the error. 

Steps to resolve:

1. 1. Update Windows:

   Ensure your operating system is fully updated with the latest security patches. 
2. 2. Check for OS version compatibility:

   Verify that your OS version is supported by Microsoft for Azure AD authentication. 
3. 3. Apply latest security updates:

   If you can't upgrade your OS, install the latest security patches for your current version
4. 4. Consider a full OS update:

   If applying individual patches is not sufficient, consider upgrading your OS to a supported version. 
5. 5. Verify device registration and authentication logs:

   If the issue persists, your IT admin may need to verify Microsoft Entra (Azure AD) device registration and authentication logs after the updates. 

By following these steps, you can ensure your device is using a supported KDF and resolve the "AADSTS5000611" error, 

By addressing the root cause – the use of an outdated cryptographic algorithm – and ensuring your device is up-to-date, you can resolve the "Symmetric Key Derivation Function version 'KDFV1' is invalid" error and restore seamless authentication

Thanks For Reading...

Masud Rana