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DTSTART:20161030T030000
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DTSTART:20160327T020000
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UID:calendar.7384.field_data.0@www.open.diag.uniroma1.it
DTSTAMP:20260404T173358Z
CREATED:20161017T112544Z
DESCRIPTION:Decentralized cryptocurrency systems offer a medium of exchange
  secured by cryptography\, without the need of a centralized banking autho
 rity. Among others\, Bitcoin is considered as the most mature one. Its pop
 ularity lies on the introduction of the concept of the blockchain\, a publ
 ic distributed ledger shared by all participants of the system. Double spe
 nding attacks  and blockchain forks are two main issues in blockchain-base
 d protocols. The first one refers to the ability of an adversary to use th
 e very same  bitcoin  more than once\,  while blockchain forks cause  tran
 sient inconsistencies in the blockchain.In this paper\, we show through pr
 obabilistic analysis that the reliability of recent solutions  that exclus
 ively rely on a particular type of Bitcoin actors\, called miners\, to gua
 rantee the consistency  of Bitcoin operations\, drastically decreases with
  the size of the blockchain.  Short BioRomaric Ludinard is associate profe
 ssor at ENSAI\, the national school for Statistics and Information Analysi
 s\, where he manages the Data sciencist specialization. His research mainl
 y focuses on models\, safety and performance of distributed systems. He wo
 rked at Inria Rennes - Bretagne Atlantique as research engineer on byzanti
 ne fault tolerance in large scale distributed systems and at Supelec Renne
 s on anomaly based intrusion detection systems. His phD was prepared in co
 njonction with Inria and Technicolor R&I and related to fault characteriza
 tion in large scale networks. His research now focuses on Blockchain proto
 cols and their guarantees.
DTSTART;TZID=Europe/Paris:20161025T100000
DTEND;TZID=Europe/Paris:20161025T120000
LAST-MODIFIED:20191008T084958Z
LOCATION:Via del Castro Laurenziano - Aula 2
SUMMARY:Seminar by Romaric Ludinard: Safety Analysis of recent Bitcoin Impr
 ovement Proposals - Romaric Ludinard
URL;TYPE=URI:http://www.open.diag.uniroma1.it/node/7384
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