End-to-end secure mobile group messaging with conversation integrity and deniability

Michael Schliep, Nicholas Hopper

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

In this paper, we describe Mobile CoWPI, a deployable, end-to-end secure mobile group messaging application with proofs of security. Mobile CoWPI allows dynamic groups of users to participate in, join, and leave private, authenticated conversations without requiring the participants to be simultaneously online or maintain reliable network connectivity. We identify the limitations of mobile messaging and how they affect conversational integrity and deniability. We define strong models of these security properties, prove that Mobile CoWPI satisfies these properties, and argue that no protocol that satisfies these properties can be more scalable than Mobile CoWPI. We also describe an implementation of Mobile CoWPI and show through experiments that it is suitable for use in real-world messaging conditions.

Original languageEnglish (US)
Title of host publicationWPES 2019 - Proceedings of the 18th ACM Workshop on Privacy in the Electronic Society
PublisherAssociation for Computing Machinery
Pages55-73
Number of pages19
ISBN (Electronic)9781450368308
DOIs
StatePublished - Nov 11 2019
Event18th ACM Workshop on Privacy in the Electronic Society, WPES 2019, co-located with the 26th ACM Conference on Computer and Communications Security, CCS 2019 - London, United Kingdom
Duration: Nov 11 2019 → …

Publication series

NameProceedings of the ACM Conference on Computer and Communications Security
ISSN (Print)1543-7221

Conference

Conference18th ACM Workshop on Privacy in the Electronic Society, WPES 2019, co-located with the 26th ACM Conference on Computer and Communications Security, CCS 2019
CountryUnited Kingdom
CityLondon
Period11/11/19 → …

Keywords

  • End-to-end encryption
  • Secure messaging

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