Earlier quoted context omitted.
> If nothing else, im sure it shows up in the analytics if someone's netflix account is 24/7 streaming every episode of every show without break. That would happen with or without DRM.
But DRM would in principle require you to watch it all in real time, which would probably help with profiling the abnormal behaviour.
Trying to extract Widewine key: A journey to failure
121–130 of 133 posts
Re: Trying to extract Widewine key: A journey to failure
#122Earlier quoted context omitted.
The UHD restriction is not a technical one. Content producers and the rest of the media industry has strict requirements about streaming. UHD content uses proprietary DRM systems from Microsoft and Apple that are considered more secure than WideVine, which is why those browsers are permitted to watch 4k. You can't watch UHD content on Edge for Linux, for example, because the necessary DRM isn't implemented.
So does this mean that the DRM is still at least partially implemented in software? I also seem to remember that Netflix on Windows (don't know about mac) also requires hardware decoding support for HEVC1 (or whatever their codec is). I never got it to work with an intel GPU (8th gen udh630 — supposed to support it) but it worked with an AMD GPU.
I don't know a lot about how everything works below the hood, but you can probably find some of the details on the Microsoft website [0] if you want.
Re: Trying to extract Widewine key: A journey to failure
#123The majority of media-based DRM implementations are completely bunk and fundamentally broken. You — yes, you, reader — are able to take advantage of DRM implementations and break their fundamental premise without much effort. What's the point if someone with a faint degree of technical ability can redirect your content? I'd argue you're just putting lipstick on a pig. The idea itself is nice; I get the point. If I'm…
But, apparently not Widevine and not the kind of HN reader who wrote the article. They spent weeks trying to extract the key and failed. The article is a story of their failure.
Re: Trying to extract Widewine key: A journey to failure
#124Can someone explain what's the point of DRM for video streaming when you can do screen recording so easily. It could make sense in books and games but why is netflix such a heavy proponent for it?
A good enough DRM system does not have to be 100% unbeatable all the time. It's sufficient to:
a. Delay a hacked release until after most of the sales have already occurred. This is very often the case with successful game DRM. A crack after six months is irrelevant because virtually all the sales are in the first month or so. A crack that comes out after everyone with interest has already ponied up doesn't matter much, and in fact an unbeatable DRM that never gets cracked would suggest misallocation of resources!
b. Focus cracks on a handful of specialists who can then be investigated and potentially prosecuted or bought out. A DRM so easy 100,000 people can crack it is very different to a DRM that only 5 people have cracks for and where they keep their cracks private. The latter becomes amenable to non-technical approaches. Again, an unbeatable DRM would probably represent a waste of effort.
There are quite a few DRM schemes that have achieved this level of good-enough success which is why despite decades of people railing against it in online forums such as this one, it sticks around regardless.
Re: Trying to extract Widewine key: A journey to failure
#125The majority of media-based DRM implementations are completely bunk and fundamentally broken. You — yes, you, reader — are able to take advantage of DRM implementations and break their fundamental premise without much effort. What's the point if someone with a faint degree of technical ability can redirect your content? I'd argue you're just putting lipstick on a pig. The idea itself is nice; I get the point. If I'm…
Re: Trying to extract Widewine key: A journey to failure
#126Can someone explain what's the point of DRM for video streaming when you can do screen recording so easily. It could make sense in books and games but why is netflix such a heavy proponent for it?
You will most likely find that your OS gives you a black square for the DRM content when you record the screen. This is facilitated by OS support on Windows, iOS, etc. It’s also why HDCP exists to prevent capture from HDMI etc.
Re: Trying to extract Widewine key: A journey to failure
#127Earlier quoted context omitted.
The production costs in music are orders of magnitude lower than those for video. It takes far fewer people far fewer days to record a song than a TV show or a movie. The equipment involved in recording, mixing, and special effects are all dramatically cheaper, which also makes the entire process more accessible and enables scales that do not exist for most media. A business model for one thing does not generalize.
The cost of the input is irrelevant. Sell things for money generalized pretty well in basically every other field. It actually generalized pretty well in video too. This is just adding "remove the DRM". It'll be fine once all the old studio execs retire...
Let's start with the most obvious: "sell things for money" hasn't worked out that well in music. Streaming services (with DRM) are 83% of revenue in the music industry now: https://www.businessofbusiness.com/articles/vinyl-record-sal...
The price of music is dramatically lower. Its consumption model is entirely different - a song may be played dozens of times on a radio station or a streaming platform, each performance for pennies. Video, on the other hand, is predominately a single-shot mechanism. There's enough new content that almost no customers will watch the same piece of video multiple times. You have to make back all of your revenue in that initial purchase. Combined with higher production costs, you need higher prices. You also need a guarantee people will have to pay those prices to justify the investment and even begin the process. DRM is such a guarantee.
Re: Trying to extract Widewine key: A journey to failure
#128Earlier quoted context omitted.
This seems to be confirmed by the fact that most torrent sites have 4K copies of brand new streaming only content while no publicly known exploits exist. Since you are running the exploit locally without affecting other peoples machines, I imagine it would be close to impossible to work out what exploit they are using.
Are those actual decrypted copies of the original stream, though? Or did they just re-record the output? For the latter you'd only need to break HDCP, right?
Re: Trying to extract Widewine key: A journey to failure
#129Can someone explain what's the point of DRM for video streaming when you can do screen recording so easily. It could make sense in books and games but why is netflix such a heavy proponent for it?
You will most likely find that your OS gives you a black square for the DRM content when you record the screen. This is facilitated by OS support on Windows, iOS, etc. It’s also why HDCP exists to prevent capture from HDMI etc.
Re: Trying to extract Widewine key: A journey to failure
#130The majority of media-based DRM implementations are completely bunk and fundamentally broken. You — yes, you, reader — are able to take advantage of DRM implementations and break their fundamental premise without much effort. What's the point if someone with a faint degree of technical ability can redirect your content? I'd argue you're just putting lipstick on a pig. The idea itself is nice; I get the point. If I'm…
The majority of media-based DRM implementations are completely bunk and fundamentally broken. You — yes, you, reader — are able to take advantage of DRM implementations and break their fundamental premise without much effort But, apparently not Widevine and not the kind of HN reader who wrote the article. They spent weeks trying to extract the key and failed. The article is a story of their failure.