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Rechained: Sybil-Resistant Distributed Identities for the Internet of Things and Mobile Ad Hoc Networks.

Arne Bochem1, Benjamin Leiding2

  • 1Institute of Computer Science, University of Goettingen, 37077 Goettingen, Germany.

Sensors (Basel, Switzerland)
|June 2, 2021
PubMed
Summary

Rechained deters Sybil attacks in decentralized networks by monetarily discouraging fake identities. This scheme is effective for Internet of Things devices with intermittent connectivity, enhancing network security.

Keywords:
IdentityInternet of ThingsSybil attackauthenticationblockchainsecurityself sovereign identity

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Area of Science:

  • Computer Science
  • Network Security
  • Cryptography

Background:

  • The proliferation of Internet of Things (IoT) devices fuels the growth of decentralized, self-organizing networks.
  • These networks are increasingly vulnerable to Sybil attacks, where attackers create numerous fake identities to manipulate network behavior.
  • Existing Sybil attack defenses are often unsuitable for IoT environments due to limited resources and unreliable connectivity.

Purpose of the Study:

  • To introduce Rechained, a novel scheme designed to mitigate Sybil attacks in decentralized networks.
  • To provide a monetary disincentive against the creation of Sybil identities, particularly for networks with intermittent or no internet connectivity.
  • To enhance network security for resource-constrained IoT devices.

Main Methods:

  • Development of a new identity revocation mechanism integrated with self-sovereign identity and decentralized identifier concepts.
  • Formalization of the Rechained protocol using Colored Petri Nets for correctness and suitability analysis.
  • Evaluation of the scheme's performance on low-powered hardware through proof-of-concept implementations.

Main Results:

  • Case studies provide analysis of the costs associated with Sybil identities, establishing security bounds.
  • The scheme demonstrates effectiveness in disincentivizing Sybil identity creation.
  • Proof-of-concept implementations confirm the scheme's performance on resource-limited IoT hardware.

Conclusions:

  • Rechained offers a viable solution for enhancing security in decentralized networks, especially those with intermittent connectivity.
  • The monetary disincentive mechanism effectively combats Sybil attacks without requiring significant computational power from devices.
  • The proposed identity revocation and integration with decentralized identifiers provide a robust framework for secure decentralized systems.