[rc5] [Fwd: Re: [SolVets] New competing team - RC5 team Finland]

LEFEBVRE Herve 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
>                keys
>                > 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
>                initiatve?
>                > Aren't we searching through the same space once
>                more?
>                >
>                >Bohumil
> 
>                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.
> 
>                Tuukka
> 
> ----
> --
> Herve Lefebvre
> aegir at hol.fr
----
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