Also, you should probably spend more time reading about cryptography and less time reading FIDO Alliance propaganda.
The first is if I can reprogram it, then so can anyone else. I don't know what the situation is where you live, but government has passed laws allowing them to compel all manufacturers of reprogrammable devices to all them to reprogram is with their spyware.
The second is places I interact with, like banks, insist on having guarantees on the devices I use to authenticate myself. Devices like a credit card. "I promise to never reprogram this card so it debits someone else's account" simply won't fly with them.
The easy way out of that is to ensure the entity who can reprogram it has a lot of skin in the game and deep pockets. This is why they trust a locked pixel running Google signed android to store your cards. But take the same phone running a near identical OS, but on unlocked hardware so you reprogram it, and they won't let you store cards.
But that's the easy way out. It still let's a government force Google to install spyware, so it's not the most secure way. One way to make it secure is to insist no one can reprogram it. That's what a credit card does.
In any case, if someone successfully got the law changed in the way the OP suggested, so people could not use their devices as a digital passport, it won't only be me wishing a pox on their house.
It's actually the other way around, the only way to garantue that your device is free of spyware is you reprogramming it. You shouldn't have to trust the potentially compromised manufacturer.
In this case the government may mandate to have spyware pre-installed in the factory - which is already the case for phones and laptops in some countries.
> I promise to never reprogram this card so it debits someone else's account
When reprogramming, the card should wipe private keys so it becomes just a "blank" without any useful information.
I prefer to have my auth device bricked than compromised.
for anything else, i want to be able to reprogram.
so for vendors, a simple choice :
* be OTP, but no "patching"
* be R/W, but also by its owner
Secondly, they have no control over companies not based where I live. So I could just import it myself, provided you are successful get ever country to pass a law the denies me the right to do this the way I want to do it.
The fact that there is always something you must trust in a device, as opposed to being able to prove it's trustworthy to yourself by just looking at it is so well known it has a name: is called the root of trust.
The interesting thing is it can ensure the root of trust the only thing you need to trust. The ability to do that makes your statement factually wrong. In fact it's drop dead simple. The root of trust only need let you read all firmware you loaded back, so you can verify it is what you would have loaded yourself. TPM's and secure boot are built around doing just that. Secure boot is how the banks and whoever else know you are running a copy of Android produced by Google.
Regardless the rest us who don't want to go through the extra work OTP creates still of use want to put our credit cards, fido2 keys, government licences, concert tickets and whatever else in one general purpose computing device so we don't have to carry lots of little auth devices. To do pull that off securely this device must have firmware I can not change.
The OP wants to make it illegal to sell a device with firmware I can not change.
In asking for that, they've demonstrated they don't have a clue how secure and opening computing works. If they somehow got it implemented it would be a security disaster for them and everybody else.
It doesn't work for the same reason the electricity company doesn't let you reprogram your electricity meter. Unlike the raucous response here as far as I far as I can tell, no one complains about that arrangement, despite the fact the meter is on your property, on land you own, and you effectively pay for it. They put up with it because of want the electricity, they know the electricity can't trust all their customers with metering it, and when it's all said and done putting a small box on their property the electricity has absolute control over is hardly a big deal.
It's exactly the same deal with your computer, or should be. There is a little area on a device you own that you have no control over. Ideally visible and running open source software with reproducible builds, so you can verify it does what it says on the box, and yes neither you nor anyone else can change it, so it meets your condition.
But it's purpose doesn't. It's purpose is to load the equivalent of electricity meters, which are software other people can change and you can't. Thus this area on the your device carves out others areas it can give ironclad guarantees to a third party they solely control, you can not reprogram, and you can't even see the secrets they store there (like encryption keys). These areas don't meet your definition. The third party can reprogram them, but you can't, you can't even see into them.
These areas can do things like behave like a credit cards, be a phones eSim, house a FIDO2 key that some their party attests is only ever stored securely.
Currently we depend on the likes of Google and Apple to provide us with this. I'm not sure Apple can be said to provide it, as they insist on vetting everything you can run that doesn't live in a browser. Google does better because you can side load, if you are willing to jump through hoops must people can't. Wouldn't it be great if debian could do it too? But to pull that off, debian developers would have to be believe allowing users to hand over control of a space on their computer they can't see or alter, to a third party debian didn't trust somehow works open source. It's not a big jump from the current firmware policy.
If that's the only option they have, it will fly. Just like you used to be able to use banking apps with any Android before they had the option to restrict that to only Google-controlled ones.
It's not your electricity meter, it belongs to the electricity company. There is no pretense that you own it.
> It's exactly the same deal with your computer, or should be. There is a little area on a device you own that you have no control over.
No thanks. Society has functioned thousands of years without something like that.