17 Dec
2003
17 Dec
'03
11:17 p.m.
The defect in this notion that the LEAF is encrypted with the family key, which is not public knowledge. The mode that this encryption is performed in is not public knowledge, either.
Yeah, that was brain damage on my part. My basic idea was that it is possible, for some chaining methods, to find out where in the LEAF the chipid is by watching what changes when you vary the keys and the chipids used, even if you *don't* have the Family Key or know the encryption mode, but the set of modes and component orders for which that works is more limited than I first thought. There are still some that work, though. Bill