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Brief Announcement: Twins – BFT Systems Made Robust

Shehar Bano, Alberto Sonnino, Andrey Chursin, Dmitri Perelman, Zekun Li, Avery Ching, Dahlia Malkhi, Seth Gilbert
Twins is an effective strategy for generating test scenarios with Byzantine [Lamport et al., 1982] nodes in order to find flaws in Byzantine Fault Tolerant (BFT) systems.  ...  Twins finds flaws in the design or implementation of BFT protocols that may cause correctness issues.  ...  The full version of the paper presents a new flaw exposed by Twins in Fast HotStuff [8] and known flaws re-materialized as Twins scenarios in several BFT protocols (Zyzzyva [9] , FaB [11] , Sync HotStuff  ... 
doi:10.4230/lipics.disc.2021.46 fatcat:wjyvypsvive5bdoyuftepvsq7u

SoK: Understanding BFT Consensus in the Age of Blockchains [article]

Gang Wang
2021 IACR Cryptology ePrint Archive  
We then survey, compare, and categorize the state-of-the-art solutions to understand BFT consensus in detail.  ...  Under the hood of blockchain, consensus protocols play the most important role to achieve distributed replication systems.  ...  Fig. 8 shows a transaction state diagram in PnyxDB. 5) Other Leaderless Consensuses: Leaderless Byzantine Paxos is a brief announcement proposed by Lamport in 2011 [95] .  ... 
dblp:journals/iacr/Wang21c fatcat:wggbkbi25fg43fieebp4qzlk3m

Scaling Distributed Ledgers and Privacy-Preserving Applications [article]

Alberto Sonnino
2021 arXiv   pre-print
The resulting system has extremely low-latency for both confirmation and payment finality.  ...  Chainspace is scalable by sharding state; it is secure against subsets of nodes trying to compromise its integrity or availability properties through Byzantine Fault Tolerance (BFT).  ...  Twins: White-Glove Approach for BFT Testing. arXiv preprint arXiv:2004.10617, 2020 10. Mustafa Al-Bassam, Alberto Sonnino, Vitalik Buterin, and Ismail Khoffi.  ... 
arXiv:2102.12273v1 fatcat:3twoaysg7rcj7h4yogwsyyzd34

Distributed Computing with Permissioned Blockchains and Databases (Dagstuhl Seminar 19261)

C. Moha, Beng Chin Ooi, Gottfried Vossen, Michael Wagner
2019 Dagstuhl Reports  
Seminar June 23-28, 2019 - 2012 ACM Subject Classification Information systems → Data management systems License Creative Commons BY 3.0 Unported license © C.  ...  Brief Announcement: Byzantine fault-tolerant consensus with almost linear communication complexity. In CoRR. 2019. 6 M. Sadoghi, S. Blanas. Transaction Processing on Modern Hardware.  ...  Brief Announcement: revisiting consensus protocols through wait-free parallelization. In 33rd International Symposium on Distributed Computing (DISC 2019). 4 J. Hellings, and M. Sadoghi.  ... 
doi:10.4230/dagrep.9.6.69 dblp:journals/dagstuhl-reports/0001OV19 fatcat:vwtnp5r6cjejtj2m7bnsio5mai

Blockchain for the Cybersecurity of Smart City Applications [article]

Omar Cheikhrouhou, Ichrak Amdouni, Khaleel Mershad, Maryem Ammi, Tuan Nguyen Gia
2022 arXiv   pre-print
The authors first gave a brief overview of smart cities and blockchain.  ...  Another system that aims at providing incentives to vehicles to forward announcements was explained in [146] .  ... 
arXiv:2206.02760v1 fatcat:yuyen5kynnfwphh7vqn4ccywk4

RESILIENT REGULATION OF WIRELESS COMMUNICATION IN DISTRIBUTED SYSTEMS Resilient Regulation of Wireless Communication in Distributed Systems

Rishabh Dudheria, Rishabh Dudheria, Prof Minsky
Therefore, in this work we focus on the regulation of wireless communication between the various agents of an open, mobile, heterogeneous distributed system.  ...  decentralized access control with the goal of making LGI more trustworthy to the failure and compromise of its own enforcement infrastructure, so that it can address the needs of modern wireless distributed systems  ...  Then, we demonstrate how the LGIbased solution to the delegation problem can be made more robust via the "Twin Controller (TC) Model".  ... 

Hungarian Peacekeepers in Africa and a Hungarian Perspective on the UN Mission in Mozambique

Besenyő János
2018 Figshare  
-BFT).  ...  The technological progress in the 19 th century announced decisive changes in studying space.  ...  La configuration spatiale courante des forces roumaines et les missions reçus et/ou supposées dans les systèmes de soutien dans le théâtre ont influencé la taille de leurs communications et d'information  ... 
doi:10.6084/m9.figshare.7108646.v1 fatcat:ltmbq7644fbj3fywbusldmfh5u

Grundsätze für die Standortentscheidung öffentlicher Logistikzentren New system for intermoadal transport in Czech Republic

Václav Cempírek, Jaromír Široký
Curb weight is 6 400 kg and total weight 39 000 kg.AAE AG presented well-tried prototype of new article plateau bucket wagon Twin (Picture 4) for transportation of bulk cargo semi-trailers, which was made  ...  Keywords: Public transport, integrated transport system, information LITERATURE INTRUCTION Integrated Transport Systems are made up of several elements and factors placed at different levels whose  ... 

Dagstuhl Reports, Volume 9, Issue 6, June 2019, Complete Issue [article]

In some environments, an authority may required to issue a final approval to operate before the system is made available to its users.  ...  At the same time, we leverage public blockchains to make the auction winner announcement, and payments accountable [2] .  ...  In this talk, we introduce a simple and efficient system to estimate room acoustic for plausible reproduction of spatial audio using 360 • cameras for VR/AR applications.  ... 
doi:10.4230/dagrep.9.6 fatcat:3w3rearmjrdejkbazhpjqmucde

Aspects of Tigrinya literature (until 1974)

Hailu Habtu
From the works treating prostitution and 'dissolute' life at length or making more brief references to them, a typology of prostitution can be made.  ...  Although the period of the British Administration was brief, the system it established was to have a far-reaching impact especially as regards the development of Tigrinya as a written language The use  ...  He (the son) went outside saying"You have now made me sad I" The father said, "Come nowi Cheer upl In that case, we will sell some grain instead to send you to school". (The son) "What will we eat?"  ... 
doi:10.25501/soas.00028848 fatcat:membio5wxvc2dh2g4myeffrwmq

Salisbury Advertiser 05-1885

(:Unkn) Unknown
Todd made an excellent old farmer. The Twin Brothers "LAndry" and "Didier," were taken by Messrs. George Moore and Walter Humphreys.  ...  The latest report from Delaware College is that immediately upon the announcement being made that a special meeting of the Board of Trustees for it-organization had been called for the 13th inst all the  ...  Orchard grass is a robust grower, and very tenacious of life.  ... 
doi:10.13016/m2df6k45c fatcat:vceu36hyn5ftpom7qo56hrqple

Salisbury Advertiser 02-1904

(:Unkn) Unknown
General Cbaffcc made a speech to the other commanders. It was brief and brusque, and it carried the day. The allied column moved on to Peking In a rush rather than n inarch.  ...  School, will hold the festival in the church Wednesday evening next in--fttead of Fridays--«N-announced in last week's issue.  ...  Americans bavo also constructed lighting plants for the city of Seoul, and are investing in tho development of a water system for tho other i h'R" principles of Christianity Mr. Ellegood tVan LIES.  ... 
doi:10.13016/m2df6k46v fatcat:eltofrqpsjg2xg4qsomwhogkfu

Salisbury Advertiser 03-1873

(:Unkn) Unknown
Kllegood, frlio made the "f^referatory rtcmarki." Mr.  ...  the toon, bat as it is the approach of tbc twin that brings the Petrels, they ought lb be grateful t» fhem for the warning they give.  ...  Under tho circumstances it would be wise for the people interested in this work to bestir themselves in fulfilling the promises made Congress. TnE PDBI.IC SCHOOLS.  ... 
doi:10.13016/m2z892g51 fatcat:scw62hhjkjb77h7jy6dewmeuju