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Efficient multiplicative sharing schemes

Blackburn, SR; Burmester, M; Desmedt, Y; Wild, PR; (1996) Efficient multiplicative sharing schemes. In: Maurer, U, (ed.) ADVANCES IN CRYPTOLOGY - EUROCRYPT '96. (pp. 107 - 118). SPRINGER-VERLAG BERLIN

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Abstract

Multiplicative threshold schemes are useful tools in threshold cryptography. For example, such schemes can be used with a wide variety of practical homomorphic cryptosystems (such as the RSA, the El Gamal and elliptic curve systems) for threshold decryption, signatures, or proofs. The paper describes a new recursive construction for multiplicative threshold schemes which makes it possible to extend the number of users of such schemes for a relatively small expansion of the share size. We discuss certain properties of the schemes, such as the information rate and zero knowledge aspects.The paper extends the Karnin-Greene-Hellman bound on the parameters of ideal secret sharing schemes to schemes which are not necessarily ideal and then uses this as a yardstick to compare the performance of currently known multiplicative sharing schemes.

Type:Proceedings paper
Title:Efficient multiplicative sharing schemes
Event:International Conference on the Theory and Application of Cryptographic Techniques (EUROCRYPT 96)
Location:SARAGOSSA, SPAIN
Dates:1996-05-12 - 1996-05-16
ISBN:3-540-61186-X
Keywords:SECRET, SYSTEMS
UCL classification:UCL > School of BEAMS > Faculty of Engineering Science > Computer Science

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