Paper 2010/210

Fully Secure Identity-Based Encryption Without Random Oracles: A variant of Boneh-Boyen HIBE

Yu Chen

Abstract

We present an Identity-Based Encryption (IBE) scheme that is fully secure without random oracles and has several advantages over previous such schemes - namely, computational efficiency, shorter public parameters, and simple assumption. The construction is remarkably simple and the security reduction is straightforward. We first give our CPA construction based on the decisional Bilinear Diffie-Hellman (BDH) problem, then archiving the CCA security by employing secure symmetric-key encryption algorithm. Additionally, we transform the CPA construction into a new signature scheme that is secure under the computational Diffie-Helleman assumption without random oracles.

Metadata
Available format(s)
-- withdrawn --
Category
Public-key cryptography
Publication info
Published elsewhere. Unknown where it was published
Keywords
identity based encryptionefficientfully securestandard model
Contact author(s)
cycosmic @ gmail com
History
2010-04-28: withdrawn
2010-04-19: received
See all versions
Short URL
https://ia.cr/2010/210
License
Creative Commons Attribution
CC BY
Note: In order to protect the privacy of readers, eprint.iacr.org does not use cookies or embedded third party content.