Realizing Chosen Ciphertext Security Generically in Attribute-Based Encryption and Predicate Encryption

Venkata Koppula; Brent Waters

Paper 2018/847

Realizing Chosen Ciphertext Security Generically in Attribute-Based Encryption and Predicate Encryption

Venkata Koppula and Brent Waters

Abstract

We provide generic and black box transformations from any chosen plaintext secure Attribute-Based Encryption (ABE) or One-sided Predicate Encryption system into a chosen ciphertext secure system. Our transformation requires only the IND-CPA security of the original ABE scheme coupled with a pseudorandom generator (PRG) with a special security property. In particular, we consider a PRG with an bit input and bit output where each is an bit string. Then for a randomly chosen the following two distributions should be computationally indistinguishable. In the first distribution and is chosen randomly for . In the second distribution all are chosen randomly for .

Note: Added construction for PKE. Revised introduction.

Metadata

Available format(s): PDF
Publication info: Preprint. MINOR revision.
Contact author(s): k venkata vk @ gmail com
History: 2019-02-25: last of 3 revisions; 2018-09-14: received; See all versions
Short URL: https://ia.cr/2018/847
License: CC BY

BibTeX

@misc{cryptoeprint:2018/847,
      author = {Venkata Koppula and Brent Waters},
      title = {Realizing Chosen Ciphertext Security Generically in Attribute-Based Encryption and Predicate Encryption},
      howpublished = {Cryptology {ePrint} Archive, Paper 2018/847},
      year = {2018},
      url = {https://eprint.iacr.org/2018/847}
}