User blog:Martialmaniac/How does "In" work?

I have wondered about it ever since I started watching the first anime. I mean, it made no sense to me. We know that, like Zetsu, In makes the user's aura virtually undetectable, but unlike the other technique, it does not force their aura nodes shut and thus allows them to use Nen (without granting them the enhanced recuperative and perceptive abilities that Zetsu allows for, I presume). So, how does it work?

I think behind aura there could be a principle akin to that of the electromagnetic spectrum. Of course, unlike with light, it is not just "seeing", it is primarily "perceiving". Just like there are frequencies of light we cannot see, In changes the "valor" of a certain unknown property of aura, making it impossible to detect through normal means.

What is your idea?