Re: We should outlaw DRM
The point of the cache network-wise is so that more than one person can access the same content without having to download it twice. This falls apart in the Netflix model because EACH user has a different encryption key, so the same copy delivered to two different users looks different during transit: resulting in a cache miss. And the content owners insist on it being this way end-to-end. They don't want the content transiting in ANY kind of "common" format: even a common encrypted format because, at some point, the content has to be transcrypted to the user's key, and it's there that a man in the middle can pirate the content. So in the end, because of the content owners, caches are useless for the purpose of significantly reducing common traffic because, essentially, NONE of the traffic is common at all, as they ALL pass with different encryption keys.