Hi Anders,
Thanks for contacting Syncfusion support.
As of now, we don’t have any option to secure the license key from exposing. We have implemented this licensing (key) validation system to avoid using our products inadvertently, so there is no need to add it in a secure way.
We are just using this licensing concept to prevent customers from using our controls without their knowledge.
So, you can directly use license key in your code for your development works.
Let us know if you’ve any concerns.
Regards,
Manikandaprabu.T