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Broadcast Complexity and Adaptive Adversaries in Verifiable Secret Sharing
Joint Authors
Rezvani, Mohsen
Hosseini Beghaeiraveri, Seyed Amir
Izadi, Mohammad
Source
Security and Communication Networks
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-08-01
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Information Technology and Computer Science
Abstract EN
Verifiable secret sharing (VSS) is one of the basic problems in the theory of distributed cryptography and has an important role in secure multiparty computation.
In this case, it is tried to share a confidential data as secret, between multiple nodes in a distributed system, in the presence of an active adversary that can destroy some nodes, such that the secret can be reconstructed with the participation of certain size of honest nodes.
A dynamic adversary can change its corrupted nodes among the protocol.
So far, there is not a formal definition and there are no protocols of dynamic adversaries in VSS context.
Also, another important question is, would there exist a protocol to share a secret with a static adversary with at most 1 broadcast round? In this paper, we provide a formal definition of the dynamic adversary.
The simulation results prove the efficiency of the proposed protocol in terms of the runtime, the memory usage, and the number of message exchanges.
We show that the change period of the dynamic adversary could not happen in less than 4 rounds in order to have a perfectly secure VSS, and then we establish a protocol to deal with this type of adversary.
Also, we prove that the lower bound of broadcast complexity for the static adversary is (2,0)-broadcast rounds.
American Psychological Association (APA)
Hosseini Beghaeiraveri, Seyed Amir& Izadi, Mohammad& Rezvani, Mohsen. 2020. Broadcast Complexity and Adaptive Adversaries in Verifiable Secret Sharing. Security and Communication Networks،Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1208916
Modern Language Association (MLA)
Hosseini Beghaeiraveri, Seyed Amir…[et al.]. Broadcast Complexity and Adaptive Adversaries in Verifiable Secret Sharing. Security and Communication Networks No. 2020 (2020), pp.1-10.
https://search.emarefa.net/detail/BIM-1208916
American Medical Association (AMA)
Hosseini Beghaeiraveri, Seyed Amir& Izadi, Mohammad& Rezvani, Mohsen. Broadcast Complexity and Adaptive Adversaries in Verifiable Secret Sharing. Security and Communication Networks. 2020. Vol. 2020, no. 2020, pp.1-10.
https://search.emarefa.net/detail/BIM-1208916
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1208916