68 citations · 156 across the 20 of their papers we have counts for
23 papers
Three variations of Heads or Tails Game for Bitcoin
Cyril Grunspan, Ricardo Perez-Marco
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 addr…
Proof of reserves and non-double spends for Chaumian Mints
Cyril Grunspan, Ricardo Perez-Marco
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 re…
Proof of Reputation
Cyril Grunspan, Ricardo Perez-Marco
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 n…
Ping-Pong Swaps
Cyril Grunspan, Ricardo Perez-Marco
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.…
Block withholding resilience
Cyril Grunspan, Ricardo Perez-Marco
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 pr…
Profit lag and alternate network mining
Cyril Grunspan, Ricardo Pérez-Marco
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 reven…