[Resource Topic] 2016/1028: Ratcheted Encryption and Key Exchange: The Security of Messaging

Welcome to the resource topic for 2016/1028

Title:
Ratcheted Encryption and Key Exchange: The Security of Messaging

Authors: Mihir Bellare, Asha Camper Singh, Joseph Jaeger, Maya Nyayapati, Igors Stepanovs

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.

ePrint: https://eprint.iacr.org/2016/1028

Talk: https://www.youtube.com/watch?v=vT6k9J7aWm0

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