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Fully Dynamic Secret Sharing Schemes

  • C. Blundo
  • A. Cresti
  • A. De Santis
  • U. Vaccaro
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 773)

Abstract

We consider secret sharing schemes in which the dealer has the feature of being able (after a preprocessing stage) to activate a particular access structure out of a given set and/or to allow the participants to reconstruct different secrets (in different time instants) by sending to all participants the same broadcast message. In this paper we establish a formal setting to study such secret sharing schemes. The security of the schemes presented is unconditional, since they are not based on any computational assumption. We give bounds on the size of the shares held by participants and on the site of the broadcast message in such schemes.

Keywords

Prime Power Access Structure Broadcast Message Threshold Scheme Conditional Mutual Information 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1994

Authors and Affiliations

  • C. Blundo
    • 1
  • A. Cresti
    • 2
  • A. De Santis
    • 1
  • U. Vaccaro
    • 1
  1. 1.Dipartimento di Informatica ed ApplicationiUniversità di SalernoBaronissi (SA)Italy
  2. 2.Dipartimento di Science dell’ InformationeUniversità di Roma “La Sapienza”RomaItaly

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