HIBE With Short Public Parameters Without Random Oracle

  • Sanjit Chatterjee
  • Palash Sarkar
Conference paper

DOI: 10.1007/11935230_10

Part of the Lecture Notes in Computer Science book series (LNCS, volume 4284)
Cite this paper as:
Chatterjee S., Sarkar P. (2006) HIBE With Short Public Parameters Without Random Oracle. In: Lai X., Chen K. (eds) Advances in Cryptology – ASIACRYPT 2006. ASIACRYPT 2006. Lecture Notes in Computer Science, vol 4284. Springer, Berlin, Heidelberg

Abstract

At Eurocrypt 2005, Waters presented an identity based encryption (IBE) protocol which is secure in the full model without random oracle. In this paper, we extend Waters’ IBE protocol to a hierarchical IBE (HIBE) protocol which is secure in the full model without random oracle. The only previous construction in the same setting is due to Waters. Our construction improves upon Waters’ HIBE by significantly reducing the number of public parameters.

Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Sanjit Chatterjee
    • 1
  • Palash Sarkar
    • 1
  1. 1.Applied Statistics Unit, Indian Statistical InstituteKolkataIndia

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