[RC5] Active subspaces/random subspaces

mkw mkw at att.net
Thu May 7 22:44:11 EDT 1998

R. Kelley Cook wrote:
> On Wed, 6 May 1998 11:45:00 -0500 (CDT), Jim C. Nasby wrote:
> >The basic reason for this is that the clients are coded to use the
> >current subspace+1 as the random subspace. It might be more space
> >efficient to issue out of random keyspaces (ie: switch from 0x64 to 0x65,
> >instead of 0x66), but it would also increase the dupe rate durring
> >switchover periods. Also, redoing random subspaces right now isn't an
> >option, since that would make a completed subspace the random one, meaning
> >that almost all randomly generated blocks would be dupes.
> How about make the random subspace to be current_subspace+2.  And then
> when the current subspace is complete to increment by one.  This would
> make more sense to me...
I'd say future clients should be set to use ( curr_subsp + (curr_subsp % 2)
+ 1 ) as the random subspace. That would allow uneven subspaces (e.g. 0x67
to be closed out.

Michael                        [writing to you from 40°15'37"N 74°57'49"W]
*       Michael K. Weise           Helping to get American products      *
* German Localization Services         ready for German-speaking markets *
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