Zobrazeno 1 - 10
of 335
pro vyhledávání: '"A Grunspan"'
Autor:
Grunspan, Cyril, Perez-Marco, Ricardo
We present three very simple variants of the classic Heads or Tails game using chips, each of which contributes to our understanding of the Bitcoin protocol. The first variant addresses the issue of temporary Bitcoin forks, which occur when two miner
Externí odkaz:
http://arxiv.org/abs/2405.04168
Autor:
Grunspan, Cyril, Perez-Marco, Ricardo
E-cash was invented in 1982 by David Chaum as an anonymous cryptographic electronic cash system based on blind signatures. It is not a decentralized form of money as Bitcoin. It requires trust on the server or Mint issuing the e-cash tokens and valid
Externí odkaz:
http://arxiv.org/abs/2306.12783
Autor:
Ivan Bassi, Moshe Grunspan, Gideon Hen, Kishore A. Ravichandran, Noga Moshe, Laura Gutierrez-Miranda, Stav R. Safriel, Daria Kostina, Amitay Shen, Carmen Ruiz de Almodovar, Karina Yaniv
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-18 (2024)
Abstract The neurovascular unit (NVU) is a complex multicellular structure that helps maintain cerebral homeostasis and blood-brain barrier (BBB) integrity. While extensive evidence links NVU alterations to cerebrovascular diseases and neurodegenerat
Externí odkaz:
https://doaj.org/article/4ca7b4b8477f4f57b5023cd9d6d0a375
Autor:
Grunspan, Cyril, Perez-Marco, Ricardo
We present the new mining protocol Proof-of-Reputation (PoR) for decentralized Proof-of-Work (PoW) blockchains, in particular for Bitcoin. PoR combines the classical PoW with the new ingredient of cryptographic reputation. The same level of security
Externí odkaz:
http://arxiv.org/abs/2302.06966
Autor:
Grunspan, Cyril, Perez-Marco, Ricardo
We propose Ping-Pong Swaps: A secure pure peer-to-peer crosschain swap mechanism of tokens or cryptocurrencies that does not require escrow nor an intermediate trusted third party. The only technical requirement is to be able to open unidirectional p
Externí odkaz:
http://arxiv.org/abs/2211.13335
Autor:
Grunspan, Cyril, Perez-Marco, Ricardo
It has been known for some time that the Nakamoto consensus as implemented in the Bitcoin protocol is not totally aligned with the individual interests of the participants. More precisely, it has been shown that block withholding mining strategies ca
Externí odkaz:
http://arxiv.org/abs/2211.07270
Autor:
Wolach, Ofir 1, 2, ∗, Levi, Itai 3, Nachmias, Boaz 4, Tavor, Sigal 5, Amitai, Irina 2, 6, Ofran, Yishai 7, Ganzel, Chezi 7, Zuckerman, Tsila 8, 9, Okasha, Doaa 10, Hellmann, Ilana 11, Tadmor, Tamar 9, 12, Dally, Najib 13, Canaani, Jonathan 14, Stemer, Galia 15, Grunspan, Moshe 16, Berger, Adi Jacob 16, Frankel, Neta 16, Berelovich, Jenia 16, Bleterman, Alexandra 16, Barak, Moran 16, Cohen, Raanan 16, Moshe, Yakir 17
Publikováno v:
In Blood Advances October 2024
Autor:
Grunspan, Cyril, Pérez-Marco, Ricardo
For a mining strategy we define the notion of "profit lag" as the minimum time it takes to be profitable after that moment. We compute closed forms for the profit lag and the revenue ratio for the strategies "selfish mining" and "intermittent selfish
Externí odkaz:
http://arxiv.org/abs/2010.02671
Autor:
Grunspan, Cyril, Pérez-Marco, Ricardo
Publikováno v:
EMS Newsletter [115 (2020)], [31-37]. \c{opyright} European Mathematical Society
We survey recent results on the mathematical stability of Bitcoin protocol. Profitability and probability of a double spend are estimated in closed form with classical special functions. The stability of Bitcoin mining rules is analyzed and several t
Externí odkaz:
http://arxiv.org/abs/2003.00001
The ambition of the Lightning Network is to provide a second layer to the Bitcoin network to enable transactions confirmed instantly, securely and anonymously with a world scale capacity using a decentralized protocol. Some of the current proposition
Externí odkaz:
http://arxiv.org/abs/2002.01374