Paper 2012/155
Toward Practical Group Encryption
Laila El Aimani and Marc Joye
Abstract
A group encryption scheme allows anyone to form a ciphertext for a given group member while keeping the receiver's identity private. At the same time, the encryptor is capable of proving that some (anonymous) group member is able to decrypt the ciphertext and, optionally, that the corresponding plaintext satisfies some \apriori\ relation (to prevent sending bogus messages). Finally, in case of a dispute, the identity of the intended receiver can be recovered by a designated authority. In this paper, we abstract a generic approach to construct group encryption schemes. We also introduce several new implementation tricks. As a result, we obtain group encryption schemes that significantly improve the state of the art. Both interactive and non-interactive constructions are considered.
Metadata
- Available format(s)
-
PDF
PS
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. Unknown where it was published
- Keywords
- Group encryptionCanetti-Halevi-Katz paradigmhomomorphic encryptionstructure-preserving signatures(non)-interactive zero-knowledge.
- Contact author(s)
- laila elaimani @ yahoo fr
- History
- 2012-03-23: received
- Short URL
- https://ia.cr/2012/155
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2012/155,
author = {Laila El Aimani and Marc Joye},
title = {Toward Practical Group Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2012/155},
year = {2012},
url = {https://eprint.iacr.org/2012/155}
}
