International Association for Cryptologic Research

International Association
for Cryptologic Research


Paper: Identity-Based Encryption Gone Wild

Michel Abdalla
Dario Catalano
Alexander W. Dent
John Malone-Lee
Gregory Neven
Nigel P. Smart
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Abstract: In this paper we introduce a new primitive called identity-based encryption with wildcards, or WIBE for short. It allows to encrypt messages to a whole range of users simultaneously whose identities match a certain pattern. This pattern is defined through a sequence of fixed strings and wildcards, where any string can take the place of a wildcard in a matching identity. Our primitive can be applied to provide an intuitive way to send encrypted email to groups of users in a corporate hierarchy. We propose a full security notion and give efficient implementations meeting this notion under different pairing-related assumptions, both in the random oracle model and in the standard model.
  title={Identity-Based Encryption Gone Wild},
  booktitle={IACR Eprint archive},
  keywords={public-key cryptography / Identity-based encryption, provable security},
  note={An extended abstract of this paper appeared in Michele Bugliesi, Bart Preneel, Vladimiro Sassone, and Ingo Wegener, editors, 33rd International Colloquium on Automata, Languages and Programming - ICALP 2006, volume 4052 of Lecture Notes in Computer Scienc},
  author={Michel Abdalla and Dario Catalano and Alexander W. Dent and John Malone-Lee and Gregory Neven and Nigel P. Smart},