CCA2 Secure IBE: Standard Model Efficiency through Authenticated Symmetric Encryption

Eike Kiltz; Yevgeniy Vahlis

Paper 2008/020

CCA2 Secure IBE: Standard Model Efficiency through Authenticated Symmetric Encryption

Eike Kiltz and Yevgeniy Vahlis

Abstract

We propose two constructions of chosen-ciphertext secure identity-based encryption (IBE) schemes. Our schemes have a security proof in the standard model, yet they offer performance competitive with all known random-oracle based schemes. The efficiency improvement is obtained by combining modifications of the IBE schemes by Waters and Gentry with authenticated symmetric encryption.

Metadata

Available format(s): PDF
Category: Public-key cryptography
Publication info: Published elsewhere. CT-RSA 2008
Contact author(s): evahlis @ cs toronto edu
History: 2008-06-23: revised; 2008-01-22: received; See all versions
Short URL: https://ia.cr/2008/020
License: CC BY

BibTeX

@misc{cryptoeprint:2008/020,
      author = {Eike Kiltz and Yevgeniy Vahlis},
      title = {{CCA2} Secure {IBE}: Standard Model Efficiency through Authenticated Symmetric Encryption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2008/020},
      year = {2008},
      url = {https://eprint.iacr.org/2008/020}
}