Yep, exactly… it was all custom created with the help of the Venmo engineer. It was not by any means standardized tap and pay, and wasn’t even standard for Venmo. The solution had nothing to do with the UID, it was a custom crafted NDEF record that also required the payee to give up the secure key to his Venmo account to the vendor… really not something fit for anything other than this proof of concept.
There have been other attempts at payment solutions that are similar, including a lot of work in the bitcoin space… but until VivoKey comes out, it will not be able to be secured. There is no way a static identifier stored on an xNT or any other implant will be able to be secured… only VivoKey will be able to actually perform cryptographic processes inside the body, which means private keys are not transmitted.