[rc5] [Fwd: Re: [SolVets] New competing team - RC5 team Finland]
aegir at hol.fr
Tue Jul 1 17:26:47 EDT 1997
LEFEBVRE Herve wrote:
> here is an answer from cyberian rc5 team:
> > What is the algorithm for distribution of blocks of
> > to individual hosts? Are they chosen sequentially
> > or pseudo-randomly from the entire keyspace?
> > And one more question: Is there any relation to the
> > keyspace already investigated by the Bovine
> > Aren't we searching through the same space once
> Entire keyspace is divided into 2^32 blocks. Each
> block contains fixed high 32 bits and all combinations
> of 24 low bits. Blocks are arrenged into 2^16
> "columns" , with the intention of only one host
> working on column at time. Of course when number of
> active hosts exceeds certain treshold more hosts can
> be allocated into same column.
> When server boots up columns are arranged into
> certain order (chosen to avoid explored keyspace by
> other projects). Whenever host either reports blocks
> for some column or requests block range, the column
> in question is moved to lower rank in queue. Block
> requests are allocated to topmost column.
> I'm going to negotiate with distibuted.net to see if we
> can periodically exchange explored keyspace
> information between projects.
> Herve Lefebvre
> aegir at hol.fr
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