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Improved Constructions for Universal Re-encryption
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| Abstract: | Golle et al introduced universal re-encryption, defining it as re- encryption by a player who does not know the key used for the original encryption, but which still allows an intended player to recover the plaintext. Universal re-encryption is potentially useful as part of many information-hiding techniques, as it allows any player to make ciphertext unidentifiable without knowing the key used. Golle et al?s techniques for universal re-encryption are reviewed, and improved constructions for both simple and hybrid universal re-encryption systems are presented, including a hybrid construction that permits indefinite re-encryptions with better efficiency and an almost-optimally small increase in file size. Some implementational issues and possible future directions are also discussed. |
BibTeX
@misc{eprint-2003-11968,
title={Improved Constructions for Universal Re-encryption},
booktitle={IACR Eprint archive},
keywords={implementation / information hiding reencryption mixnet anonymity},
url={http://eprint.iacr.org/2003/255},
note={ peter@m-o-o-t.org 12538 received 3 Dec 2003, last revised 30 Apr 2004},
author={Peter Fairbrother},
year=2003
}