TaffyDB can be used on Server-Side with a number of server-side solutions, but you will have to control the output on your application to include just the data.
In general, unless you plan to use a javascript server-side solution, I would say you cannot make it "secure", and even if you use non sensitive data on your front-end, I would highly recommend you go through the OSWAP guide before writing any code to determine if it is secure or not.