This is the point where it went wrong as Virgin Media implemented the new system badly. At some point Sky decided they didn't like this and required Virgin Media to change they system so that it behaved in the same way as the Sky boxes. For many years this is how it worked and you could continue to watch recordings from channels that you no longer subscribed to. As there is no connection between the encryption system used to broadcast the channels and the system used to save recordings then technically there is no requirement to still be subscribed to a channel to play back a recording. My understanding is that whilst the Sky boxes record the encrypted signal as broadcast, the Virgin Media boxes decrypt the signal, but then encrypt it again before saving to disk using a different system and an encryption key that's unique to each box (which is why you can't swap drives between boxes, they wouldn't be able to decrypt a recording made on a different box). ![]() ![]() The way that recordings work on Virgin Media boxes is different to the way that Sky do it.
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