[reustle]

This makes me wonder, could you make/3d print a simple ring for your finger and pop your oyster card (uk) / suica card (jp) / t money card (korea) / etc in it? It would essentially be just as seamless as an embedded chip in your hand, without the messiness.

[heeton]

A few people are doing similar things - I wanted a ring or something like that for a while. But now I just use Apple Pay.

http://metro.co.uk/2016/07/14/these-amazing-oyster-card-nail...

http://uk.complex.com/sports/2012/07/pay-for-the-london-metr...