PayPal exec wants to replace passwords with injectable chips

I agree with this. Like it or not, we are heading in this direction and it is the most obvious solution. It will herald the design and production of new techgnology to authenticate you on and off-line. Dog's have had this technology embeded for years. It's time we caught up. So long a we don't start chasing cars it should be good.

It is inevitable and I welcome this as a more secure and easier way to authenticate your identity, and to do away with passwords once and for all.

"Another option could be an ingestible capsule that tests unique things such as glucose levels and is powered by stomach acid..." Imagine a dirty world where we have to protect our waste from hackers. 

Nobody would bother gouging the ID chip out of a dog, all that mess for nothing, dogs don't have bank accounts.  For people passwords are still the worst form of authentication except for all the others that have been tried.

Of course implanted ID Chips that are used in animals for a variety of veterinary purposes, but have the possibility for human use in the digital age, can only be conceptualised as a voluntary provision. I cannot possibly see how this can be implemented across the board by fiat in a democratic state today or in our life time. It must come down to personal choice. It is also something that will be attractive to some of today's youth and probably more so going forwards. Again it must be a personal choice.

Hypothetically, after several generations have got used to an ID chip and where the vast majority of people have freely undergone an ID implant to connect with banks, governments, educational institutions etc., there may be penalities imposed by future institutions such as banks and governments for non-compliance to an implanted ID. This might take the form of exclusion from some online websites that require a high level of security, more inconvenience and the potential of greater financial costs to be borne by those who do not want an implanted ID chip.   

This proposal mixes two ideas which are better considered separately: an embedded chip, and internal biometrics.  The only reasons to embed a chip in your body are convenience (you don't need to carry a card) and to inconvenience a thief (who now must carry a scalpel.)

Using your heartbeat or similar isn't an improvement on external biometrics.  For a start a heartbeat doesn't make a good secret.  With a little ingenuity a thief could make a recording.  Something as simple as a virus app on your smartwatch.  Or a bulk-hack of medical data stored by a hospital.  Much the same problem as fingerprints; the information isn't truly secret, and once compromised you can't change it short of a heart-transplant.