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Paper 2004/178
Optimal Updating of Ideal Threshold Schemes
S. G. Barwick and W.-A. Jackson and K. M. Martin and C. M. O'Keefe
Abstract
We consider the problem of changing the parameters of an established ideal $(k,n)$-threshold scheme without the use of secure channels. We identify the parameters $(k',n')$ to which such a scheme can be updated by means of a broadcast message and then prove a lower bound on the size of the relevant broadcast. The tightness of this bound is demonstrated by describing an optimal procedure for updating the parameters of an ideal scheme.
Metadata
- Available format(s)
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Cryptologythreshold schemesdynamic secret sharingdistributed cryptosystems
- Contact author(s)
- sbarwick @ maths adelaide edu au
- History
- 2004-07-26: received
- Short URL
- https://ia.cr/2004/178
- License
-
CC BY