Messages in this thread | | | Subject | Re: [Announce] Intel PRO/Wireless 3945ABG Network Connection | From | Alan Cox <> | Date | Sun, 26 Feb 2006 00:58:02 +0000 |
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On Sad, 2006-02-25 at 08:41 +0000, Christoph Hellwig wrote: > the regualatory problems are not true.
They are although the binary interpretation isn't AFAIK from law but from lawyers. The same is actually true in much of the EU. The actual requirement is that the transmitting device must be reasonably tamperproof. Some of the lawyers have decided that for a software radio tamperproof means "binary".
Thats pretty dumb but given the hardware variant of this is "seal anything adjustible in plastic gunge" you can see the logic at work - and it *will* help make the product tamperproof to end users. Remember Christoph you are not an "end user" any more than hardware like that is designed to proof against a person who can use a scope and solder surface mount components.
Now a smart vendor would have put MD5 sum checking into the chip so you can only load register sets for the transmitter as a block and that block is loaded such that
[Data] + Secret known only to chip = MD5sum with data
or a similar cookie signing scheme. Replay attacks don't matter here so that should be sufficient.
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