It’s a bit of math, split into two pieces.

You hand out one piece, that’s the public key. It’s tiny and simple.

You keep the other piece, that’s the private key. It’s long and complex.

The public key can scramble data that only the large piece can unscramble.

The private key can create a piece of data that only the public key can verify.

In practice, these keys can be kept in a database or a file, and they can be held in a hardware security key (yubi/fido). They can be stored on your phone, in Bitwarden, and just about anywhere that keeps passwords, they’re really just a few thousand bytes of data.

In many cases, You can store them in your phone’s private password storage, then when you log into a website, it will trigger a popup on your phone to authorize your login, so you don’t even have to keep them on the computer you’re using to access the secured site. Most of the implementations require you to have a biometric component. You need to face scan, fingerprint scan, or, worst case, use a password to unlock/verify the passkey on the device.

The upside here is that the keys are unique to every site. The public key is completely safe to hand out to everyone, it can’t be reverse engineered. This means that websites can’t leak your login credentials in any meaningful way. edit: Also since you’re using math to change a piece of data, it’s impervious to a replay attack and the communication even unencrypted would be reasonably safe even if someone was actively reading it.

As far as storing for loss, I’d consider regenerating them. I prefer using a password manager that stores them, that way my phone/computers all have access to the same keys.

Firefox, pi hole

So many f****** ads I gave my cell phone cancer.

TMA:DR

When taking the geometric mean of 73 benchmarks run for this comparison, upgrading from the Ryzen 9 7950X to 9950X on Ubuntu 24.04 LTS yielded a 14% generational improvement with this set of cross-platform applications/benchmarks while under Windows 11 was a 10% generational improvement. The raw performance of Ubuntu Linux on the AMD Ryzen processors also was greater overall to the extent of the Ryzen 9 7950X to Ubuntu 24.04 LTS nearly matching the Ryzen 9 9950X on Microsoft Windows 11.

You could make automatic breaking without a full blown computer, but it’s so much cheaper to put a full-blown computer than it is to do it all in hardware. Everything uses turing complete equipment now, it’s actually less expensive at this point.

There’s absolutely no reason not to put multiple computers in the car I think the real win is not surfacing it to the end user.

I’m not sure the list is really that big of a deal for a home gamer. They’re probably more in danger from their choice of home audio appliances and that microwave that has been sitting on their network for 10 years which no longer gets updates. Or that 2019 Plex server they have put forwarded straight outside.

It’s actually one of my beefs with containers, You can’t keep track of The versions for everything and you’re at the mercy of the maintainers to keep individual packages updated.