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Originally Posted by Rizla
Re: the kfx format, the soon-to-be-released jail-break increases the likelihood that kfx will (eventually) be decoded. Amazon was well aware that the FW might be cracked, and that kfx encoding might therefore be vulnerable to reverse engineering.
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It was already relatively easy to jailbreak 5.6.5 by simply connecting to the serial port, so I don't think a software jailbreak increases the likelihood of decoding the format by any significant amount. It might allow a few more people to contribute who might not be willing to hardware hack, but I doubt that it will make much difference in the long run.
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I wonder if they have allowed for that in their design of the format.
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Given that they know that there are intact serial port pads on many (all?) 5.6.5 devices, I seriously doubt they were relying on the lack of a jailbreak to protect the format.