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Open AccessArticle

Detecting Sybil Attacks in Cloud Computing  Environments Based on Fail‐Stop Signature

1
Department of Game & Multimedia Engineering, Korea Polytechnic University, Siheung‐si, Gyeonggi‐do 15073, Korea
2
Department of Computer Science & Engineering, Korea University, Seoul 02841, Korea
3
School of Information Technology Engineering, Catholic University of Daegu, Gyeongsan‐si, Gyeongsangbuk‐do 38430, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Laurence T. Yang
Symmetry 2017, 9(3), 35; https://doi.org/10.3390/sym9030035
Received: 2 January 2017 / Accepted: 28 February 2017 / Published: 2 March 2017
(This article belongs to the Special Issue Symmetry in Secure Cyber World)
Due to the loosely coupled property of cloud computing environments, no node has complete knowledge of the system. For this reason, detecting a Sybil attack in cloud computing environments is a non‐trivial task. In such a dynamic system, the use of algorithms based on tree or ring structures for collecting the global state of the system has unfortunate downsides, that is, the structure should be re‐constructed in the presence of node joining and leaving. In this paper, we propose an unstructured Sybil attack detection algorithm in cloud computing environments. Our proposed algorithm uses one‐to‐one communication primitives rather than broadcast primitives and, therefore, the message complexity can be reduced. In our algorithmic design, attacker nodes forging multiple identities are effectively detected by normal nodes with the fail‐stop signature scheme. We show that, regardless of the number of attacker nodes, our Sybil attack detection algorithm is able to reach consensus. View Full-Text
Keywords: sybil attack; cloud computing; fail‐stop signature; unstructured algorithm sybil attack; cloud computing; fail‐stop signature; unstructured algorithm
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MDPI and ACS Style

Lim, J.; Yu, H.; Gil, J. Detecting Sybil Attacks in Cloud Computing  Environments Based on Fail‐Stop Signature. Symmetry 2017, 9, 35.

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