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BEGIN:VEVENT
UID:319@lincs.fr
DTSTART;TZID=Europe/Paris:20170710T140000
DTEND;TZID=Europe/Paris:20170710T143000
DTSTAMP:20170925T103210Z
URL:https://www.lincs.fr/events/fairness-in-block-chain-systems/
SUMMARY:Fairness in block-chain systems
DESCRIPTION:Abstract: Formal security analyses for block-chains derived the
 famous\n"honest majority" assumption: the system well-behaves only if
 the\nmajority of the hashing power is in the hands of honest miners.
 This\nresult has been proven without taking into consideration
 economic\naspects related to miner's incentives and their rational
 behavior.\nOther works analyzed selfish mining with respect to incentives
 and\nconcluded that the majority assumption is not enough under
 certain\nconditions. All these studies make the implicit assumption that
 the\nhealth of the system is only in the hands of miners\, but what about
 if\nall the users leave the system. Since the system is composed of
 miners\nand users and since these two sets are disjoint in practice\,
 block\nchain's health strictly relates to the capacity of promoting
 honest\nparticipation both for miners and users. In this talk we explore
 the\nrelationship between participation and the notion of fairness.
 In\ngeneral terms\, fairness can be defined as the overall satisfaction
 of\njustified expectations of the participants. If a block-chain system
 is\nfair\, then its participants will tend to stay in the system\,
 otherwise\nthey may leave. We analyze user and miner strategies that are
 currently\npossible in BitCoin-like implementations\, and we show that
 existing\nblock-chain systems are not fair for their users. We finally
 discuss\nnew ways for improvement arguing that novel redistribution
 mechanisms\nare needed to promote participation of all nodes.
CATEGORIES:Working Group,Youtube
LOCATION:LINCS Seminars room\, 23\, avenue d'Italie\, Paris\, 75013\,
 France
GEO:48.828400;2.356897
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=23\, avenue d'Italie\,
 Paris\, 75013\, France;X-APPLE-RADIUS=100;X-TITLE=LINCS Seminars
 room:geo:48.828400,2.356897
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TZID:Europe/Paris
X-LIC-LOCATION:Europe/Paris
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DTSTART:20170326T030000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
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