[rc5] key block

Sanford Olson sanford at msn.fullfeed.com
Wed Aug 27 16:19:06 EDT 1997


At 04:01 PM 8/27/97 -0400, Seth wrote:
>The mathematician in me is having conniptions! Seriously, this 
>conversation is almost bad enough to cause physical pain in a few people 
>I know (myself included).
>
>:)
>
>When we were working on the first 1% of the keyspace, we didn't find the 
>key, so that 1% was removed. Then we worked on 1% of the remaining space, 
>and still didn't find it, so that 1% was removed. And so on, and so on... 
>until this happened sixty four times and we ran out of keys!
>
>Therefore, we're guranteed to find the key within the first 64%!
>
>Anybody care to check my math? ;)
>
>Seth

I don't understand the significance of 64.  If I take (99%)^64, I still
have over 52.5% of the keyspace left.  Perhaps you meant 100?  (99%^100
leaves about 36.6% left, thus you could 1% of remaining keyspace 100 times
and still not find the key...  *grin*)

- Sanford
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