Vadim Fedukovich wrote:
> 
> Papers/Authors/URLs list might be rather long. I do remember a paper
> of Boneh and Franklin on key-share generation and there was ITTS project
> with nice pointers to read futher. "Alternative" secret exponent
> calculation code suitable for key-share generator was here on this list
> a year ago and no errors was found since that. Please use it for OpenSSL
> if it fits somewhere.

The ITTC project:

  http://crypto.stanford.edu/~dabo/ITTC/

The idea was to split RSA private keys into additive shares.  Each
server used its share to perform a partial decrypt/sign operation, and
the results were combined to obtain a result, without reconstructing the
private key in any one location.

One of the papers covered shared key generation, and the other discussed
applications.  We implemented both a CA and a HTTPS server that
supported m-out-of-n sharing for their private keys.

> One will likely need to come up with suitable (agreed?) format for
> such a shares. CRT numbers are probably irrelevant for shares of
> RSA key and two other numbers (share index and number of shares)
> should be saved for a basic sharing scheme.
> 
> hope this helps,
> Vadim
> 
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Tom
-- 
Tom Wu
Principal Software Engineer
Arcot Systems
(408) 969-6124
"The Borg?  Sounds Swedish..."
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