Paper 2015/1064

Déjà Q: Encore! Un Petit IBE

Hoeteck Wee

Abstract

We present an identity-based encryption (IBE) scheme in composite-order bilinear groups with essentially optimal parameters: the ciphertext overhead and the secret key are one group element each and decryption requires only one pairing. Our scheme achieves adaptive security and anonymity under standard decisional subgroup assumptions as used in Lewko and Waters (TCC '10). Our construction relies on a novel extension to the Deja Q framework of Chase and Meiklejohn (Eurocrypt '14).

Metadata
Available format(s)
PDF
Publication info
Published by the IACR in TCC 2016
Contact author(s)
wee @ di ens fr
History
2015-11-02: received
Short URL
https://ia.cr/2015/1064
License
Creative Commons Attribution
CC BY

BibTeX

@misc{cryptoeprint:2015/1064,
      author = {Hoeteck Wee},
      title = {Déjà Q: Encore! Un Petit {IBE}},
      howpublished = {Cryptology {ePrint} Archive, Paper 2015/1064},
      year = {2015},
      url = {https://eprint.iacr.org/2015/1064}
}
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