10 papers · 1 filter
Symmetry all the way down
Ignacio Amores-Sesar, Christian Cachin, Simon Holmgaard Kamp +1
Asymmetric trust generalizes classical symmetric quorum systems by allowing each process to specify its own failure assumptions. While this flexibility enables tolerance of strictl…
The Tragedy of Chain Commons
Ignacio Amores-Sesar, Mirza Ahad Baig, Seth Gilbert +2
Byzantine Fault Tolerant (BFT) consensus forms the foundation of many modern blockchains striving for both high throughput and low latency. A growing bottleneck is transaction exec…
DAG it off: Latency Prefers No Common Coins
Ignacio Amores-Sesar, Viktor Grøndal, Adam Holmgård +1
We introduce Black Marlin, the first Directed Acyclic Graph (DAG)-based Byzantine atomic broadcast protocol in a partially synchronous setting that successfully forgoes the reliabl…
Weaker Assumptions for Asymmetric Trust
Ignacio Amores-Sesar, Christian Cachin, Simon Holmgaard Kamp +1
In distributed systems with asymmetric trust, each participant is free to make its own trust assumptions about others, captured by an asymmetric quorum system. This contrasts with…
DAG-based Consensus with Asymmetric Trust [Extended Version]
Ignacio Amores-Sesar, Christian Cachin, Juan Villacis +1
In protocols with asymmetric trust, each participant is free to make its own individual trust assumptions about others, captured by an asymmetric quorum system. This contrasts with…
An Analysis of Avalanche Consensus
Ignacio Amores-Sesar, Christian Cachin, Philipp Schneider
A family of leaderless, decentralized consensus protocols, called Snow consensus was introduced in a recent whitepaper by Yin et al. These protocols address limitations of existing…
We will DAG you
Ignacio Amores-Sesar, Christian Cachin
DAG-based protocols have been proposed as potential solutions to the latency and throughput limitations of traditional permissionless consensus protocols. However, their adoption h…
Eating sandwiches: Modular and lightweight elimination of transaction reordering attacks
Orestis Alpos, Ignacio Amores-Sesar, Christian Cachin +1
Traditional blockchains grant the miner of a block full control not only over which transactions but also their order. This constitutes a major flaw discovered with the introductio…
When is Spring coming? A Security Analysis of Avalanche Consensus
Ignacio Amores-Sesar, Christian Cachin, Enrico Tedeschi
Avalanche is a blockchain consensus protocol with exceptionally low latency and high throughput. This has swiftly established the corresponding token as a top-tier cryptocurrency.…
Security Analysis of Ripple Consensus
Ignacio Amores-Sesar, Christian Cachin, Jovana Mićić
The Ripple network is one of the most prominent blockchain platforms and its native XRP token currently has one of the highest cryptocurrency market capitalizations. The Ripple con…