Good question & answer from NBS is is likely to be if we told...

Good question & answer from NBS is is likely to be if we told you we would have to shoot you.

The answer for mere laypersons appears to be;

1. They have a propriety 2d matrix which can can contain suitable amount of data - but also huge amount of permutations.

2. Mobile phones can be set up to read the 2d matrix & data can upload/download to central data base on suitable encrypted basis.

What to know how quick/elegant this process is. The big deal here is enforcement people can quickly verify if ID card is valid & have sufficient independent data to work out person "offering" card is legit holder?

Lots going on in this space - same concept different application - more limited - see asx listed datadot - it puts micro material on objects - unreadable to human eye but can be read with scanner & use for asset protection/identification