Keyless access systems

But then you have to have the transmitter with you again.

I can see that I will have to deal with the implantation after all.
[Frauchen bekommt das dann einfach beim nächsten runden Geburtstag und dem evtl damit einhergehenden Vollrausch injiziert]

Yes, but the transmitters come in a wide variety of versions, e.g. keychains for car keys or similar, as long as you’re not walking around naked as a nudist, you’ll find something.

Based on recent experiences, the fingerprint system has become useless for me...
It usually doesn’t work anymore with dirty fingers. In my specific case (I tinker a lot with old machines), that was the deal-breaker for me and this system.

And depending on the security level of the system (in the following case a business notebook from HP at the highest security level), sometimes even a cut on the finger is enough to prevent recognition.
At first glance, this has nothing to do with the aforementioned access systems, but I want to say that one should also inform oneself about this aspect.
HP acted quickly and patched it, improving recognition of, for example, injuries.
That would at least require an update for a door access system if one exists at all.
This should possibly also be included in the research if you are at risk here (trades professions, for example).

You can enroll each individual finger with the fingerprint system. If you cut one finger, you still have 9 fingers left. Or is the argument now "if I lose both hands in the machine, I still want to get in"?!
If you have dirty hands, just wash them. There’s always at least one finger clean enough; otherwise, you’re “ruining” the device and the front door anyway with your oil.

We have fingerprint access, it works great. We still have a normal front door key to get in in case of emergency. You can weld it shut and bury it in the garden, hide it under some paving stone, or put it somewhere else (in the back box of the box in the shed), or leave it with your parents, or wherever, to still be able to get in after 10 years in case of a power outage.

Of course, you can train every finger. But even with the middle finger, it was a contortion to press it individually on the protruding pad, and with the ring finger, I gave up^^

When my hands are dirty, logically all fingers are dirty, and usually pretty badly. "Just wash them" isn’t always something done quickly, and I also don’t want to have to wash my hands every time I make a short "house visit." Most of the time, I just grab an additional tool and keep working, washing hands would be nonsense then. Apart from the fact that fingers often don’t get really clean just by washing hands.
That’s why I prefer an extra "Werkstattschlüssel" hanging individually on a cord. If I want to go into the house, only this one gets dirty because I use it to open the door at the same time.

Again, I don’t want to speak badly of it or portray it negatively. That’s why I write, FOR ME the system is done. It simply doesn’t fit my ideas.

Our fingerprint scanner is flat, so there are no contortions. And it still recognizes my finger even when there’s a bandage stuck on it that covers half the fingertip. But I wouldn’t want to use the scanner with oily fingers, if only because of the mess.

And it still recognizes my finger even when there's a plaster stuck on it that covers half of the fingertip.

But this also means that the security of the system is limited in favor of recognition. The security increases with the area of the scan used, but comfort decreases because the frequency of rejections rises. However, partial prints are left almost everywhere, so personally I would prefer higher security. Everyone has to weigh this for themselves if they even think about it.