Not that I disagree with you, but to be fair, there's no way to tell any modern CPU that's in your computer hasn't been backdoored.
Intel CPU's most certainly do not have a glowing reputation in that department.
No, it does not. A backdoor is a backdoor and once it's out there it will sooner or later be used by everyone with enough resources, making the "who" irrelevant. Any Windows or Intel backdoors are very likely now in the hands of all major intelligence services around the world.
But let me frame it in a different, albeit slightly crass way: if you have a turd floating in your soup can you honestly say there's a good answer for "who put it there?" that will make you like that soup more?
Of course not, croutons are generally appreciated, while backdoors are only appreciated by ignorant people, hackers, spies, and dictators.
> your stupid example
That's harsh given that you don't even seem to have processed what the example was conveying:
> you ate it right up until the moment you realized it
So then let's try again: once you realize the turd is there will knowing it's Russian, Chinese, or from the US make a difference on whether to keep eating or not? On whether to complain or not? Because GP claiming "Backdoored by whom is an important real-world distinction" suggests you, the customer, keep eating and don't complain if you like the answer.
I find the analogy to be reasonably valid.
Not really. Once something is backdoored by X, it can be accessed not only by X, but also by anyone who managed to hack into X. This is one of the main objections against adding backdoors (no matter how they are named, a backdoor doesn't stop being a backdoor just because you named it a "front door") to cryptographic protocols; even if you try to somehow make it so only "good guys" can use the backdoor, the "good guys" can be compromised (through technical or social means) by the "bad guys".
As an example, many telephony systems around the world have backdoors meant to be used only by local police. In a well-known case in Europe (https://en.wikipedia.org/wiki/Greek_wiretapping_case_2004%E2...), these backdoors were exploited by agents of a foreign country.
But given that my present choice can only be between devices that are backdoored by the intelligence services of democratic nations with strong rule of law, or authoritarian regimes, and there is no third option, the choice is clear.
so if you are Chinese you better stick with American security, if you are American you might consider chinese/Russian security etc
Even a slight glance at modern history will quickly tell you what would be in the best interest of these heroes.
Apple's CPU wasn't that interesting at the start either, it's early days yet.