Why Can't I Buy A CableCARD Ready Set-Top Box?

Al E Usse writes "Ars Technica does a write up of the problems that were not solved by the July 1, 2007 integration ban on integrated security in your cable box. The goal was to get everyone on the same page by requiring standardized technology. Just the same, the cable companies aren't really playing ball. 'The companies who make the boxes don't seem interested in selling to consumers [and] cable companies still push their own branded devices.' The article covers some deep background on the whole CableCARD mess, and concludes with the current state of the market: 'Based on June 2007 figures from the cable industry, 271,000 CableCARDs have been deployed. That's an astonishingly low number. 58 percent of all US households with a TV subscribe to cable, according to the NCTA, which means that 65 million households have at least basic cable.'"

Comments

Re:hackable?

[oni]

Each card has a public and private key. The cable company's signal is also encrypted, but there's a public band somewhere where the cable company can communicate will any cablecard that happens to be listening. So you plug the cable card into the TV (or tivo or whatever) and then go to the setup menu and read off a string of numbers. That string represents the card's public key.

The cable company takes its encryption key and encrypts it with the card's public key, then transmits that over the public band. Every cable card device sees this, but only the target card (your card) is able to read it, and use the card's private key to decrypt it.

So now the card has been given the cable company's encryption key, and can decrypt the signal and let you watch all the sweet sweet porn.^H^H^H^H^H discovery HD. The cable company periodically changes its key, and it keeps a list of all the cable cards that are authorized and sends the new key to all those cards.

IF you had all of this working in software, then you could copy the cable company's key into as many other devices as you want. That way, you could pay for one TV, but have other TVs authorized. But, you would have to keep copying the key to all the other devices. You absolutely could not get perpetual free cable. The best you can do is pay for one but actually have many. Hardly even seems worth it.