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Article type: Research Article
Authors: Blundo, Carlo; * | Masucci, Barbara
Affiliations: Dipartimento di Informatica ed Applicazioni, Università di Salerno, 84081 Baronissi (SA), Italy. E-mail: carblu@dia.unisa.it, masucci@dia.unisa.it; URL: http://www.unisa.it/~carblu, http://www.unisa.it/~masucci
Correspondence: [*] Corresponding author.
Abstract: In dynamic threshold schemes the dealer is able (after a preprocessing stage) to allow sets of participants of a given cardinality to reconstruct different secrets (in different time instants) by sending them the same broadcast message. In this paper we provide a tight lower bound on the number of random bits needed by the dealer to set up a dynamic threshold scheme.
Keywords: Data security, cryptography, randomness, secret sharing schemes, entropy
DOI: 10.3233/JCS-1999-7104
Journal: Journal of Computer Security, vol. 7, no. 1, pp. 73-85, 1999
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