Paper 2022/559
DeCAF: Decentralizable Continuous Group Key Agreement with Fast Healing
Abstract
Continuous group key agreement (CGKA) allows a group of users to maintain a continuously updated shared key in an asynchronous setting where parties only come online sporadically and their messages are relayed by an untrusted server. CGKA captures the basic primitive underlying group messaging schemes.
Current solutions including TreeKEM ("Messaging Layer Security'' (MLS) IETF RFC 9420) cannot handle concurrent requests while retaining low communication complexity. The exception being CoCoA, which is concurrent while having extremely low communication complexity (in groups of size
Metadata
- Available format(s)
-
PDF
- Category
- Cryptographic protocols
- Publication info
- Published elsewhere. Major revision. International Conference on Security and Cryptography for Networks (SCN) 2024
- Keywords
- group messagingCGKAMLS
- Contact author(s)
-
alwenjo @ amazon com
bauerbac @ ista ac at
mcuetono @ ista ac at
karen klein @ inf ethz ch
gpasper @ pm me
pietrzak @ ista ac at - History
- 2024-07-10: last of 2 revisions
- 2022-05-10: received
- See all versions
- Short URL
- https://ia.cr/2022/559
- License
-
CC BY
BibTeX
@misc{cryptoeprint:2022/559, author = {Joël Alwen and Benedikt Auerbach and Miguel Cueto Noval and Karen Klein and Guillermo Pascual-Perez and Krzysztof Pietrzak}, title = {{DeCAF}: Decentralizable Continuous Group Key Agreement with Fast Healing}, howpublished = {Cryptology {ePrint} Archive, Paper 2022/559}, year = {2022}, url = {https://eprint.iacr.org/2022/559} }