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UID:661@lincs.fr
DTSTART;TZID=Europe/Paris:20220316T150000
DTEND;TZID=Europe/Paris:20220316T160000
DTSTAMP:20220323T143844Z
URL:https://www.lincs.fr/events/cryptocurrency-wallet-security-solutions/
SUMMARY:Cryptocurrency Wallet Security Solutions
DESCRIPTION:With the growing popularity of cryptocurrencies\, interest in
 digital signatures for securing keys is also on the rise. Researchers have
 been attempting since the 90’s to enhance known signature schemes with
 new properties useful in specific cases. Due to their use in
 cryptocurrencies\, threshold ECDSA and EdDSA signatures have received much
 attention in recent years.&nbsp\;\n\nIn the past few months\, a range of
 protocols has been published\, allowing for non-interactive\, proactive
 security\, identifiable aborts\, fairness in the honest majority setting\,
 and other properties such as dynamic settings and interoperability.
 Proactive security and non-interactivity properties are the most studied
 solutions for cryptocurrency securities. Proactive security is the notion
 of defending a distributed system against an attacker who compromises
 different devices through its lifetime\, but no more than a threshold
 number of them at any given time. Non-interactivity: allowing a subset of a
 group of people to generate a signature without having to interact. A
 solution to the quest for noninteractivity is to divide the signature into
 two steps: the presigning (or offline) phase condenses most communication
 rounds and can be performed long before the signature is needed\, while the
 signing (or online) phase takes only a single round and happens after the
 message is chosen. Most protocols however require that the subset of the
 signers be fixed before presigning\, since they are the only ones who
 participate in it.&nbsp\;\n\nIn this talk\, I will present our two novel
 non-interactive threshold ECDSA protocols that remove the need for this
 assumption either partially or entirely. The security of these schemes is
 proven in a simulation-based definition. To evaluate the performance of the
 second protocol\, it has been implemented in RUST and benchmarked.
 Additionally\, I will talk about the extension of this work towards
 proactive security and interoperability-based solutions.
CATEGORIES:Seminars,Youtube
LOCATION:Zoom + LINCS\, 23 avenue d'Italie\, Paris\, 75013\, France
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 Paris\, 75013\, France;X-APPLE-RADIUS=100;X-TITLE=Zoom + LINCS:geo:0,0
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DTSTART:20211031T020000
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