Paper 2016/1028 Original: eprint.iacr.org/2016/1028 ↗
Ratcheted Encryption and Key Exchange: The Security of Messaging
Abstract
We aim to understand, formalize and provably achieve the goals underlying the core key-ratcheting technique of Borisov, Goldberg and Brewer, extensions of which are now used in secure messaging systems. We give syntax and security definitions for ratcheted encryption and key-exchange. We give a proven-secure protocol for ratcheted key exchange. We then show how to generically obtain ratcheted encryption from ratcheted key-exchange and standard encryption.
Metadata
- Available format(s)
PDF- Category
- Cryptographic protocols
- Publication info
- Preprint.
- History
- 2019-03-16: last updated
- 2016-11-01: published
- Short URL
- https://ia.cr/2016/1028
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2016/1028,
author = {Mihir Bellare and Asha Camper Singh and Joseph Jaeger and Maya Nyayapati and Igors Stepanovs},
title = {Ratcheted Encryption and Key Exchange: The Security of Messaging},
howpublished = {Cryptology {ePrint} Archive, Paper 2016/1028},
year = {2016},
url = {https://eprint.iacr.org/2016/1028}
}