187 citations · 229 across the 9 of their papers we have counts for
4 papers · 1 filter
Modeling Resources in Permissionless Longest-chain Total-order Broadcast
Sarah Azouvi, Christian Cachin, Duc V. Le +2
Blockchain protocols implement total-order broadcast in a permissionless setting, where processes can freely join and leave. In such a setting, to safeguard against Sybil attacks,…
Pikachu: Securing PoS Blockchains from Long-Range Attacks by Checkpointing into Bitcoin PoW using Taproot
Sarah Azouvi, Marko Vukolić
Blockchain systems based on a reusable resource, such as proof-of-stake (PoS), provide weaker security guarantees than those based on proof-of-work. Specifically, they are vulnerab…
Decentralisation Conscious Players And System Reliability
Sarah Azouvi, Alexander Hicks
We propose a game-theoretic model of the reliability of decentralised systems based on Varian's model of system reliability, to which we add a new normalised total effort case that…
Sliding Window Challenge Process for Congestion Detection
Ayelet Lotem, Sarah Azouvi, Patrick McCorry +1
Many prominent smart-contract applications such as payment channels, auctions, and voting systems often involve a mechanism in which some party must respond to a challenge or appea…