Welcome to the resource topic for 2007/100
Title:
Practical Identity-Based Encryption (IBE) in Multiple PKG Environments and Its Applications
Authors: Shengbao Wang, Zhenfu Cao
Abstract:Identity-based encryption (IBE) schemes are usually used in multiple-PKG environments — on the one hand, each administrative domain (e.g., a relatively small and close organization) maintains its own private key generator (PKG); on the other hand, encryption across domains becomes a prevalent requirement. In this paper, we present a new IBE scheme using bilinear pairings. Compared with the famous IBE scheme of Boneh and Franklin, we show that ours is more practical in the multiple-PKG environment. We prove that our scheme meets chosen ciphertext security in the random oracle model, assuming the intractability of the standard Bilinear Diffie-Hellman (BDH) problem. As an application of our IBE scheme, we also propose an escrowed ElGamal scheme which possesses certain good properties in practice.
ePrint: https://eprint.iacr.org/2007/100
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