Title :
On the Impossibility of Basing Identity Based Encryption on Trapdoor Permutations
Author :
Boneh, Dan ; Papakonstantinou, Periklis A. ; Rackoff, Charles ; Vahlis, Yevgeniy ; Waters, Brent
Author_Institution :
Stanford Univ., Stanford, CA
Abstract :
We ask whether an identity based encryption (IBE) system can be built from simpler public-key primitives. We show that there is no black-box construction of IBE from trapdoor permutations (TDP) or even from chosen ciphertext secure public key encryption (CCA-PKE). These black-box separation results are based on an essential property of IBE, namely that an IBE system is able to compress exponentially many public-keys into a short public parameters string.
Keywords :
public key cryptography; black-box separation; chosen ciphertext secure public key encryption; identity-based encryption system; public-key primitive; trapdoor permutation; Computer science; Identity-based encryption; Lattices; National security; Polynomials; Power system modeling; Power system security; Public key; Public key cryptography; Terrorism;
Conference_Titel :
Foundations of Computer Science, 2008. FOCS '08. IEEE 49th Annual IEEE Symposium on
Conference_Location :
Philadelphia, PA
Print_ISBN :
978-0-7695-3436-7
DOI :
10.1109/FOCS.2008.67
