splitting keys

[Adrian 'Dagurashibanipal' von Bidder]

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On Mon, 2003-03-03 at 00:34, Michael H. Warfield wrote:
> On Sat, Mar 01, 2003 at 11:01:30AM +0100, Adrian 'Dagurashibanipal' von B=
idder wrote:

still valid:
> > [no cc:s necessary. Thanks.]

>         That same NDSS paper touches on "t out of k sharing".  They claim
> that standard Shamir secret sharing is inadequate specifically because th=
e
> secret key would have to be reconstructed at a single location in order t=
o
> be used.  They present a method that works for reasonably small k (k < 20=
).
> The paper includes sitations for both Shamir secret key sharing (A. Shami=
r,
> "How to share a secret", Communications of the ACM, Vol 22, 1979, pp 612-=
613)
> and an alternative to their approach (T. Rabin, "A simplified approach to
> threshold and proactive RSA", Proceedings of Crypto '98).  I'm sure there
> are other references to t of k sharing which do not require reconstitutin=
g
> the RSA key.

Thanks a lot - I don't know if I ever have the time to really dig in
here, but the reference has been noted.

cheers
-- vbi


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