No, you don't need pro.
You need wrs, any GS and need some free time to unpack data.
Actually, this is the pointless discussion.
I don't see any so critical data that should be hidden. If it's so critical then defend it in other way, copyright it for example
Because there is the simple rule: if someone can build something then someone other can break it. It depends on time/money available, motivation, etc.