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It's a bit more fundamental in my opinion. Cryptographic techniques are supported by strong mathematics; while I believe hardware-based techniques will always b
by JW_00000 1y ago
It's a bit more fundamental in my opinion. Cryptographic techniques are supported by strong mathematics; while I believe hardware-based techniques will always be vulnerable against a sufficiently advanced hardware-based attack. In theory, there exists an unbreakable version of OpenSSL ("under standard cryptographic assumptions"), but it is not evident that there even is a way to implement the kind of guarantees confidential computing is trying to offer using hardware-based protection only.
- dist-epoch 1y agoProof of existence does exist. Some Xbox variant has now been unbroken (jailbroken) for more than 10 years. And not for lack of trying. Credit/debit cards with chips (EMV) are another proof of existence that hardware-based protection can exist. > It is not evident that there even is a way to implement the kind of guarantees confidential computing is trying to offer using hardware-based protection only. Not in the absolute, but in the more than $10 mil required to break it (atomic microscopes to extract keys from CPU gates, ...), and that to break a single specific device, not the whole class.
- hansvm 1y agoAs soon as a bad actor has a single key the entire class is broken since the bad actor can impersonate that device, creating a whole cloud of them if they want.
- dist-epoch 1y agoYou would not be able to use that cloud of impersonated device online - Microsoft would see that device connecting multiple times and ban it. And the key would not allow you to jailbrake another Xbox. So at most you might be able to make a PC look like an Xbox, but a PC is more expensive to start with. So unclear exactly what you have accomplished.