Improving PTP robustness to the byzantine failure

2015 ◽  
Author(s):  
Marcelo Dalmas ◽  
Higor Rachadel ◽  
Gustavo Silvano ◽  
Carlos Dutra
Keyword(s):  
Byzantine Failure

Dilemmas in Digital Forensics for Computer Equipment Security and Maintenance in Remote Ships

2012 ◽  
Vol 490-495 ◽  
pp. 1382-1386
Author(s):  
Hu Chen
Keyword(s):  
Digital Forensics ◽  
Embedded Devices ◽  
New Techniques ◽  
Computer Equipment ◽  
Byzantine Failure ◽  
Digital Investigation ◽  
Fault Source

As remote ships have equipped a large number of computer equipments, the maintenance of such equipments confronts a great challenge. Since some embedded devices among them may be hacked by attackers or disabled by Byzantine failure, to discover the attacking originality and fault source present foremost importance. In this article, we discuss digital investigation and forensics as a general viewpoint. We point out some dilemmas that hinder the development of digital forensics, some of which may be fundamental problems. We propose to expand the concept of digital forensics to a wider scope so as to include digital investigation for information instead of only evidence. We also argue that the fostering of novel contributions should be relied on technical experts instead of law experts as emerging new techniques always result in new digital crimes. We promote the divorce between the technical experts who focus on the contribution of technologies, and legal authorities who are responsible to bridge the gap between technologies and standard/formalization. Digital forensics methods are encouraged to be publicly available, but the contributors should be aware of the possibility of anti-forensics.

scholarly journals METHOD TO ACHIEVE SECURITY AND STORAGE SERVICES IN CLOUD COMPUTING

2013 ◽  
pp. 10-13
Author(s):  
SYED SADDAM HUSSAIN ◽  
R.VINOD KUMAR
Keyword(s):  
Cloud Storage ◽  
Distributed Storage ◽  
Security Risks ◽  
Cloud Data ◽  
Outsourced Data ◽  
Cloud Storage Service ◽  
Byzantine Failure ◽  
Storage Correctness ◽  
Cloud Applications ◽  
And Storage

Cloud storage enables users to remotely store their data and enjoy the on-demand high quality cloud applications without the burden of local hardware and software management. Though the benefits are clear, such a service is also relinquishing users ‘physical possession of their outsourced data, which inevitably poses new security risks toward the correctness of the data in cloud. In order to address this new problem and further achieve a secure and dependable cloud storage service, we propose in this paper a flexible distributed storage integrity auditing mechanism, utilizing the homomorphism token and distributed erasure-coded data. The proposed design allows users to audit the cloud storage with very lightweight communication and computation cost. The auditing result not only ensures strong cloud storage correctness guarantee, but also simultaneously achieves fast data error localization, i.e., the identification of misbehaving server. Considering the cloud data are dynamic in nature, the proposed design further supports secure and efficient dynamic operations on outsourced data, including block modification, deletion, and append. Analysis shows the proposed scheme is highly efficient and resilient against Byzantine failure, malicious data modification attack, and even server colluding attacks)

scholarly journals A SURVIVABLE DISTRIBUTED DATABASE AGAINST BYZANTINE FAILURE

2017 ◽  
Vol 15 (2) ◽  
pp. 61-72
Author(s):  
D O ABORISADE ◽  
A S SODIYA ◽  
A A ODUMOSU ◽  
O Y ALOWOSILE ◽  
A A ADEDEJI
Keyword(s):  
Distributed Databases ◽  
Database Systems ◽  
Distributed Database ◽  
Critical Systems ◽  
Contributing Factors ◽  
Internal Factors ◽  
Wide Range ◽  
Byzantine Failure ◽  
Byzantine Failures ◽  
The Face

Distributed Database Systems have been very useful technologies in making a wide range of information available to users across the World. However, there are now growing security concerns, arising from the use of distributed systems, particularly the ones attached to critical systems. More than ever before, data in distributed databases are more susceptible to attacks, failures or accidents owing to advanced knowledge explosions in network and database technologies. The imperfection of the existing security mechanisms coupled with the heightened and growing concerns for intrusion, attack, compromise or even failure owing to Byzantine failure are also contributing factors. The importance of  survivable distributed databases in the face of byzantine failure, to other emerging technologies is the motivation for this research. Furthermore, It has been observed that most of the existing works on distributed database only dwelled on maintaining data integrity and availability in the face of attack. There exist few on availability or survibability of distributed databases owing to internal factors such as internal sabotage or storage defects. In this paper, an architecture for entrenching survivability of Distributed Databases occasioned by Byzantine failures is proposed. The proposed architecture concept is based on re-creating data on failing database server based on a set  threshold value.The proposed architecture is tested and found to be capable of improving probability of survivability in distributed database where it is implemented to  99.6%  from 99.2%. 

scholarly journals On the Versatility of Bracha’s Byzantine Reliable Broadcast Algorithm

2021 ◽  
pp. 2150006
Author(s):  
Michel Raynal
Keyword(s):  
Upper Bound ◽  
Message Passing ◽  
Upper Bounds ◽  
Failure Model ◽  
Threshold Values ◽  
Short Article ◽  
Liveness Property ◽  
Safety Property ◽  
Byzantine Failure ◽  
Reliable Broadcast

G. Bracha presented in 1987 a simple and efficient reliable broadcast algorithm for [Formula: see text]-process asynchronous message-passing systems, which tolerates up to [Formula: see text] Byzantine processes. Following an idea recently introduced by Hirt, Kastrato and Liu-Zhang (OPODIS 2020), instead of considering the upper bound on the number of Byzantine processes [Formula: see text], the present short article considers two types of Byzantine behavior: the ones that can prevent the safety property from being satisfied, and the ones that can prevent the liveness property from being satisfied (a Byzantine process can exhibit only one or both types of failures). This Byzantine differentiated failure model is captured by two associated upper bounds denoted [Formula: see text] (for safety) and [Formula: see text] for liveness). The article shows that only the threshold values used in the predicates of Bracha’s algorithm must be modified to obtain an algorithm that works with this differentiated Byzantine failure model.

scholarly journals Modeling software architecture design on data storage security in cloud computing environments

2020 ◽  
Vol 39 (6) ◽  
pp. 8557-8564
Author(s):  
Mukta Jagdish ◽  
Amelec Viloria ◽  
Jesus Vargas ◽  
Omar Bonerge Pineda Lezama ◽  
David Ovallos-Gazabon
Keyword(s):  
Data Storage ◽  
Storage Security ◽  
System A ◽  
Distributed Verification ◽  
Byzantine Failure ◽  
Modeling Software ◽  
User Data ◽  
Computing Environments ◽  
Storage Correctness ◽  
Data Blocking

Cloud-based computation is known as the source architecture of the upcoming generation of IT enterprise. In context to up-coming trade solutions, the Information Technology sections are established under logical, personnel, and physical control, it transfers application software and large database to appropriate data centers, where security and management of database with services are not trustworthy fully. So this process may face many challenges towards society and organizations and that not been well understood over a while duration. This becomes one of the major challenges days today. So in this research, it focuses on security-based data storage using cloud, which plays one of the important aspects bases on qualities of services. To assure user data correctness in the cloud system, a flexible and effective distributed technique with two different salient features was examined by utilizing the token called homomorphic with erasure-coded data for distributed verification, based on this technique it achieved error data localization and integration of storage correctness. Also, it identifies server misbehaving, efficient, and security-based dynamic operations on data blocking such as data append, delete, and update methods. Performance analysis and security show the proposed method is more effective resilient and efficient against Byzantine failure, even server colluding attacks and malicious data modification attacks.

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