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

Michael Schliep; Nicholas Hopper

doi:10.1145/3338498.3358644

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

Michael Schliep, Nicholas Hopper

Computer Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

7 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 language	English (US)
Title of host publication	WPES 2019 - Proceedings of the 18th ACM Workshop on Privacy in the Electronic Society
Publisher	Association for Computing Machinery
Pages	55-73
Number of pages	19
ISBN (Electronic)	9781450368308
DOIs	https://doi.org/10.1145/3338498.3358644
State	Published - Nov 11 2019
Event	18th 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

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

Conference

Conference	18th ACM Workshop on Privacy in the Electronic Society, WPES 2019, co-located with the 26th ACM Conference on Computer and Communications Security, CCS 2019
Country/Territory	United Kingdom
City	London
Period	11/11/19 → …

Bibliographical note

Funding Information:
We thank the anonymous reviewers for their helpful feedback. This work was supported by the NSF under grant 1814753.

Publisher Copyright:
© 2019 Association for Computing Machinery.

Keywords

End-to-end encryption
Secure messaging

Publisher link

10.1145/3338498.3358644

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Cite this

Schliep, M., & Hopper, N. (2019). End-to-end secure mobile group messaging with conversation integrity and deniability. In WPES 2019 - Proceedings of the 18th ACM Workshop on Privacy in the Electronic Society (pp. 55-73). (Proceedings of the ACM Conference on Computer and Communications Security). Association for Computing Machinery. https://doi.org/10.1145/3338498.3358644

End-to-end secure mobile group messaging with conversation integrity and deniability. / Schliep, Michael; Hopper, Nicholas.
WPES 2019 - Proceedings of the 18th ACM Workshop on Privacy in the Electronic Society. Association for Computing Machinery, 2019. p. 55-73 (Proceedings of the ACM Conference on Computer and Communications Security).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Schliep, M & Hopper, N 2019, End-to-end secure mobile group messaging with conversation integrity and deniability. in WPES 2019 - Proceedings of the 18th ACM Workshop on Privacy in the Electronic Society. Proceedings of the ACM Conference on Computer and Communications Security, Association for Computing Machinery, pp. 55-73, 18th 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, 11/11/19. https://doi.org/10.1145/3338498.3358644

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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.",

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

Abstract

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Keywords

Publisher link

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