Paper 2004/028
Custodian-Hiding Verifiable Encryption
Joseph K. Liu, Victor K. Wei, and Duncan S. Wong
Abstract
In a verifiable encryption, an asymmetrically encrypted ciphertext can be publicly verified to be decipherable by a designated receiver while maintaining the semantic security of the message \cite{AsokanShWa98,CamenischDa00,CamenischSh03}. In this paper, we introduce {\em Custodian-Hiding Verifiable Encryption}, where it can be publicly verified that there exists at least one custodian (user), out of a designated group of $n$ custodians (users), who can decrypt the message, while the semantic security of the message and the anonymity of the actual decryptor are maintained. Our scheme is proven secure in the random oracle model. We also introduce two extensions to decryption by a subset of more than one user.
Metadata
- Available format(s)
- PS
- Publication info
- Published elsewhere. WISA 2004
- Keywords
- Verifiable EncryptionPublicly VerifiableAnonymity
- Contact author(s)
- ksliu9 @ ie cuhk edu hk
- History
- 2004-08-23: last of 3 revisions
- 2004-02-02: received
- See all versions
- Short URL
- https://ia.cr/2004/028
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2004/028,
author = {Joseph K. Liu and Victor K. Wei and Duncan S. Wong},
title = {Custodian-Hiding Verifiable Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2004/028},
year = {2004},
url = {https://eprint.iacr.org/2004/028}
}
