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Jan 28, 2013 at 21:57 vote accept Khaled Nassar
Jan 28, 2013 at 12:56 comment added mikeazo @Thomas, IV's yes. Counters are not always the block length. It depends on how the counter is implemented. Recovery from key compromise is why I wouldn't touch a system like this with a thousand foot pole. It is hairy, but it was the assumption we were given to work with.
Jan 28, 2013 at 12:48 comment added Thomas I think we can assume that IV's and counters will never feasibly repeat for a decent block size (128 or 256 bits), the only problem left being key compromise: how to recover if the key is leaked? do you lose backward and possibly forward secrecy? etc..
Jan 28, 2013 at 12:37 history answered mikeazo CC BY-SA 3.0