> That was my first thought. [..] Exactly. > I think the reason they went with ML to do pattern recognition is because the THz response of the tag is a finick

> That was my first thought. [..] Exactly. > I think the reason they went with ML to do pattern recognition is because the THz response of the tag is a finicky analog signal, which might change in fundamental ways if you do things like reposition the antenna, or change what's in front/behind the tag. I don't doubt one second that it's difficult, but it's where the value really is. For security, you need a private key that is stored in an unreadable format that is destroyed by trying, followed by a challenge-response system to query it. Unfortunately, without the whole picture coming together, the method cannot be adopted. With security it's kind of all or nothing. Given the value they propose it has as a solution, bypassing these checks almost definitely has value.