Recent submissions

Comment · 12 days ago
You might consider that many many more places than Atlanta have this same baggage, all because of Robert Moses's advice.

I grew up in Nashville and it also had a vibrant black neighborhood split in half by a highway. It was explicitly how Moses told planners across the country to get highways built it happened everywhere.

Comment · 2 months ago
In this case I would try and have the old resource url display a page that links to the two new resources. It’s not that the content of a page should never change but that links into your site shouldn’t break
Comment · 10 months ago
I think it quickly needs to become good manners to indicate when text was written by AI rather than a person. I read that text differently and I shouldn't have to spend my time guessing.
Comment · 1 year ago
Apple actually attests to signatures of every single binary they install on their machines, before soft booting into a mode where no further executables can be installed: https://security.apple.com/documentation/private-cloud-compu...

We don't _quite_ have the funding to build out our own custom OS to match that level of attestation, so we settled for attesting to a hash of every file on the booted VM instead.

Comment · 1 year ago
Great questions!

1. The mechanics of the protocol are that a client will check that the software attested to has been released on a transparency log. dm-verity is what enforces that the hashes of the booted filesystem on the compute node match what was built and so those hashes are what are put on the transparency log, with a link to the deployed image that matches them. The point of the transparency log is that anyone could then go inspect the code related to that release to confirm that it isn't maliciously logging. So if you don't publish the code for your compute nodes then the fact of it being on the log isn't really useful.

So I think the answer is yes, to be compliant with OpenPCC you would need to publish the code for your compute nodes, though the client can't actually technically check that for you.

2. Absolutely yes. The client encrypts its prompt to a public key specific to a single compute node (well, technically it will encrypt the prompt N times for N specific compute nodes) where the private half of that key is only resident in the vTPM, the machine itself has no access to it. If the machine were swapped or rebooted for another one, it would be impossible for that computer to decrypt the prompt. The fact that the private key is in the vTPM is part of the attestation bundle, so you can't fake it

Comment · 1 year ago
I'm happy to be careful, you are right we are relying on TEEs and vTPMs as roots of trust here and TEEs have been compromised by attackers with physical access.

This is actually part of why we think it's so important to have the non-targetability part of the security stack as well, so that even if someone where to physically compromise some machines at a cloud provider, there would be no way for them to reliably route a target's requests to that machine.

Comment · 1 year ago
Howdy, head of Eng at confident.security here, so excited to see this out there.

I'm not sure I understand what you mean by inference provider here? The inference workload is not shipped off the compute node once it's been decrypted to e.g. OpenAI, it's running directly on the compute machine on open source models loaded there. Those machines are cryptographically attesting to the software they are running. Proving, ultimately, that there is no software that is logging sensitive info off the machine, and the machine is locked down, no SSH access.

This is how Apple's PCC does it as well, clients of the system will not even send requests to compute nodes that aren't making these promises, and you can audit the code running on those compute machines to check that they aren't doing anything nefarious.

The privacy guarantee we are making here is that no one, not even people operating the inference hardware, can see your prompts.

Comment · 1 year ago
Happy Juneteenth! A reminder that we can change as a country. May we never have to liberate by war again.
Comment · 1 year ago
OP found no correlation between railway proximity and quality
Comment · 1 year ago
OP found no correlation between railway proximity and quality
Comment · 1 year ago
OP found no correlation between railway proximity and quality
Comment · 1 year ago
OP found no correlation between railway proximity and quality
Comment · 1 year ago
OP found no correlation
Comment · 1 year ago
LOL we may need to update the title of this post, half the top level comments right now are assuming the study confirmed the hypothesis.

> With a mighty Pearson's correlation of 0.091, the data indicates that this could

> be true! If you ignore the fact that the correlation is so weak that calling it 'statistically

> insignificant' would be quite generous.

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