Paper 2007/130
Some Results on Anonymity in Hybrid Encryption
Tian Yuan, Chen Zhi-Yu, Jin Yuee, Jin Feng, and Ma Huihui
Abstract
Anonymity(key-privacy) as well as security(data-privacy) are all important features in public-key encryption applications. In this paper two new and general concepts, named “relevant anonymity” and “relevant security”, are defined. Based-upon these concepts some general results on anonymity in public-key encryption are proved, which fall in three categories. The first results are two general relationships between anonymity and security; the second are a sufficient and necessary condition for chosen-plaintext anonymity in Fujisaki-Okamoto hybrid construction and a sufficient condition for its chosen-ciphertext anonymity; the third is a sufficient condition for chosen-ciphertext anonymity in Okamoto-Pointcheval hybrid construction (REACT). All these conditions are also easy-to-use criteria in practice. By examples such general consequences are applied to some specific schemes and as a result anonymity of some well-known schemes are re-established in a simpler way. Furthermore, NISSIE scheme PSEC-/1/2/3’s chosen-ciphertext anonymity are proved.
Metadata
- Available format(s)
-
PDF
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- AnonymityProvable SecurityHybrid-SchemeKey-Privacy
- Contact author(s)
- tianyuan_ca @ sina com
- History
- 2007-04-18: received
- Short URL
- https://ia.cr/2007/130
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2007/130,
author = {Tian Yuan and Chen Zhi-Yu and Jin Yuee and Jin Feng and Ma Huihui},
title = {Some Results on Anonymity in Hybrid Encryption},
howpublished = {Cryptology ePrint Archive, Paper 2007/130},
year = {2007},
note = {\url{https://eprint.iacr.org/2007/130}},
url = {https://eprint.iacr.org/2007/130}
}
