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To Fight Big Tech, We Must Seize the Means of Computation

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Re: To Fight Big Tech, We Must Seize the Means of Computation

#81

Post by PH95VuimJjqBqy »

huytersd wrote: post #61
saulpw wrote: post #47

Earlier quoted context omitted.

Every time you say 'just' an engineer who's already spent hours trying out your simple idea pulls out another clump of hair.

Well I’m clearly coming at this from a naive perspective and I’m sure many people are learning this along with me.

It's encrypted across the cable itself, the capture card wouldn't be able to understand the signal.

the monitor itself is doing the unencrypting. As the other person said, it's specifically to protect the video from ... you.

Re: To Fight Big Tech, We Must Seize the Means of Computation

#82

Post by BXlnt2EachOther »

fxtentacle wrote: post #52
metalcrow wrote: post #50

Earlier quoted context omitted.

In regards to that, i assume that manufacturers have to apply for a cert for their device and then embed that cert, correct? Then if the device is found to be stripping HDCP the consortium can revoke that cert, but how? Sure you can do it for PCs and consoles, but are blu-ray players connected to the internet and auto-updated nowadays? Otherwise it'd be pretty easy for Chinese manufactures out of reach of the DMCA to…

"are blu-ray players connected to the internet and auto-updated nowadays?" Some blu-rays force you to update before you can watch them. Also, the key revocation lists can (I believe) be included in the blu-ray itself to make them work offline, too.

yes, keys can be revoked [in offline players] by inserting a newer disc with a newer version of the "media key block." wikipedia suggests they're up to version 78 of that data.

https://en.wikipedia.org/wiki/Media_Key_Block

Re: To Fight Big Tech, We Must Seize the Means of Computation

#83

Post by simne »

Must say, thoughts of author resonate in my mind. But for HN too little technical details on how he propose to resolve problems.

What I mean, we here speak about math models, we even know about open source models of economy of some countries.

I cannot remember here link, but anyone could find scientific articles about analyze of legislation texts, and scitech community even have one win case, when pointed on ambiguity in legislation and one parliament heared them and fixed text. To be more concrete, these works begin in 1990s, now they have official recognition.

Re: To Fight Big Tech, We Must Seize the Means of Computation

#84

Post by justinclift »

choeger wrote: post #22
huytersd wrote: post #19

Earlier quoted context omitted.

I don’t understand. If you’re watching it the bits have been decrypted. Can’t you just get them from local memory?

Realistically, no. You don't have access to the device that contains the decrypted content. Of course, you could try to open up or bypass the DRM module (e.g., via the GPU driver during hardware accelerated decoding), but that won't work with a TPM module and signed kernel space. If you look at the security technologies introduced into consumer decides over the last decades, it all serves the dual purpose of securing…

HDMI splitters have been a thing for years.

Apparently they present as a compliant HDMI output to the source device, but they don't require HDCP or similar on the output they're passing it on to.

From there, you're free to do whatever you want with the output.

Re: To Fight Big Tech, We Must Seize the Means of Computation

#85

Post by choeger »

justinclift wrote: post #84
choeger wrote: post #22

Earlier quoted context omitted.

Realistically, no. You don't have access to the device that contains the decrypted content. Of course, you could try to open up or bypass the DRM module (e.g., via the GPU driver during hardware accelerated decoding), but that won't work with a TPM module and signed kernel space. If you look at the security technologies introduced into consumer decides over the last decades, it all serves the dual purpose of securing…

HDMI splitters have been a thing for years. Apparently they present as a compliant HDMI output to the source device, but they don't require HDCP or similar on the output they're passing it on to. From there, you're free to do whatever you want with the output.

At least in theory, HDCP keys can be revoced.

Manufacturing non-compliant devices could become extremely risky.

Re: To Fight Big Tech, We Must Seize the Means of Computation

#86

Post by justinclift »

choeger wrote: post #85
justinclift wrote: post #84

Earlier quoted context omitted.

HDMI splitters have been a thing for years. Apparently they present as a compliant HDMI output to the source device, but they don't require HDCP or similar on the output they're passing it on to. From there, you're free to do whatever you want with the output.

At least in theory, HDCP keys can be revoced. Manufacturing non-compliant devices could become extremely risky.

Well, these things have already existed for years...
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