Paper 2020/1138 Original: eprint.iacr.org/2020/1138 ↗
Epochal Signatures for Deniable Group Chats
Abstract
We introduce formal definitions for deniability in group chats by extending a pre-existing model that did not have this property. We then introduce “epochal signatures” as an almost drop-in replacement for signatures, which can be used to make certain undeniable group-chats deniable by just performing that replacement. Following that we provide a practical epochal signature scheme and prove its security.
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2023-09-25: last updated
- 2020-09-21: published
- Short URL
- https://ia.cr/2020/1138
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2020/1138,
author = {Andreas Hülsing and Fiona Johanna Weber},
title = {Epochal Signatures for Deniable Group Chats},
howpublished = {Cryptology {ePrint} Archive, Paper 2020/1138},
year = {2020},
url = {https://eprint.iacr.org/2020/1138}
}