Graduate School and Research Center in Digital Sciences

Analytical models for the scalability of dynamic group-key agreement protocols and secure file sharing systems

Cantali, Gokcan; Ermis, Orhan; Caglayan, Mehmet Ufuk; Ersoy, Cem

ACM Transactions on Privacy and Security, Vol.22, N°4, Article 20, September 2019

Dynamic group key agreement protocols are cryptographic primitives to provide secure group communications in decentralized and dynamic networks. Such protocols provide additional operations to update the group key while adding new participants into the group and removing existing participants from the group without re-executing the protocol from the beginning. However, the lack of scalability emerges as one of the most significant issues of dynamic group key agreement protocols when the number of participants in the group increases. For instance, frequent participant join requests for large groups may cause an effect similar to a Distributed Denial of Service (DDoS) attack and violate the system availability due to the increase in group key update time. Therefore, analyzing the scalability of dynamic group key agreement protocols is crucial to detect conditions where the system becomes unavailable. In this article, we propose an analytical performance model to evaluate the scalability of dynamic group key agreement protocols by using queueing models. We also extend our performance model for evaluating the scalability of secure file sharing systems that utilize group key agreement protocols. Moreover, we present a demonstrative use case to show the applicability of our performance model on an example group key agreement protocol and a secure file sharing system.

Document Doi Bibtex

Title:Analytical models for the scalability of dynamic group-key agreement protocols and secure file sharing systems
Keywords:Security and privacy; Key management; Networks; Network performance evaluation; Information systems
Type:Journal
Language:English
City:
Date:
Department:Digital Security
Eurecom ref:6026
Copyright: © ACM, 2019. This is the author's version of the work. It is posted here by permission of ACM for your personal use. Not for redistribution. The definitive version was published in ACM Transactions on Privacy and Security, Vol.22, N°4, Article 20, September 2019 http://dx.doi.org/10.1145/3342998
Bibtex: @article{EURECOM+6026, doi = {http://dx.doi.org/10.1145/3342998}, year = {2019}, month = {09}, title = {{A}nalytical models for the scalability of dynamic group-key agreement protocols and secure file sharing systems}, author = {{C}antali, {G}okcan and {E}rmis, {O}rhan and {C}aglayan, {M}ehmet {U}fuk and {E}rsoy, {C}em}, journal = {{ACM} {T}ransactions on {P}rivacy and {S}ecurity, {V}ol.22, {N}°4, {A}rticle 20, {S}eptember 2019 }, url = {http://www.eurecom.fr/publication/6026} }
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