ietf-openpgp
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secret sharing (Re: CDR design document)

1997-10-24 08:22:11

Jon Wienke <JonWienk(_at_)ix(_dot_)netcom(_dot_)com> writes:
At 10:55 PM 2/21/97 GMT, Adam Back wrote:

Here is a proposal for consideration for inclusion in the OpenPGP
standard:

    http://www.dcs.ex.ac.uk/~aba/cdr/

Great work, Adam!  Pursuant to some of the recent rants on cypherpunks, I
would like to see a proposal for a secret sharing mechanism that would
allow the recovery of a storage-only key with m of n shares in the event
that the passphrase to the storage key is unavailable, with the following
attributes:

I think PGP Inc are considering secret sharing for later versions.
Perhaps it is too much for this iteration?

Secret sharing is nice, I agree, but can be complex too: what if it's
3 of 5, and one of the 5 leaves to join a competitor, can you
redistribute the share without creating a new key without losing
security?  What new packets would be required, etc.

Adam
-- 
Now officially an EAR violation...
Have *you* exported RSA today? --> http://www.dcs.ex.ac.uk/~aba/rsa/

print pack"C*",split/\D+/,`echo "16iII*o\U(_at_){$/=$z;[(pop,pop,unpack"H*",<>
)]}\EsMsKsN0[lN*1lK[d2%Sa2/d0<X+d*lMLa^*lN%0]dsXx++lMlN/dsM0<J]dsJxp"|dc`

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