I don't see any lituriature on hacking a box either. Any the 1000 numbers would be almost impostible. You could look at things like http://www.distributed.net/ . I think this has to do with crypto not hacking/cracking. I think that some for of clustering or distributed computing is able to crack to 1000 number. No let me re-state that"I know that it is posible to cypher the 1000 key". It is just a mater of time to crunch all the data.