60 citations · 145 across the 13 of their papers we have counts for
15 papers
CATs: Secure Blockchain Interoperability with Cross-chain Atomic Transactions
Andreas Penzkofer, Franck Cassez
We propose a protocol for cross-chain atomic transactions (CATs), enabling composable atomic execution across different blockchains. The protocol addresses the key interoperability…
TangleSim: An Agent-based, Modular Simulator for DAG-based Distributed Ledger Technologies
Bing-Yang Lin, Daria Dziubałtowska, Piotr Macek +2
DAG-based DLTs allow for parallel, asynchronous writing access to a ledger. Consequently, the perception of the most recent blocks may differ considerably between nodes, and the un…
Mitigation of liveness attacks in DAG-based ledgers
Darcy Camargo, Andreas Penzkofer, Sebastian Müller +1
The robust construction of the ledger data structure is an essential ingredient for the safe operation of a distributed ledger. While in traditional linear blockchain systems, perm…
Report on the energy consumption of the IOTA 2.0 prototype network (GoShimmer 0.8.3) under different testing scenarios
Louis Helmer, Andreas Penzkofer
The high energy consumption of proof of work-based distributed ledgers has become an important environmental concern. Bitcoin, for example, consumes as much energy in a year as a d…
Robustness of the Tangle 2.0 Consensus
Bing-Yang Lin, Daria Dziubałtowska, Piotr Macek +2
In this paper, we investigate the performance of the Tangle 2.0 consensus protocol in a Byzantine environment. We use an agent-based simulation model that incorporates the main fea…
Tangle 2.0 Leaderless Nakamoto Consensus on the Heaviest DAG
Sebastian Müller, Andreas Penzkofer, Nikita Polyanskii +3
We introduce the theoretical foundations of the Tangle 2.0, a probabilistic leaderless consensus protocol based on a directed acyclic graph (DAG) called the Tangle. The Tangle natu…
Reality-based UTXO Ledger
Sebastian Müller, Andreas Penzkofer, Nikita Polyanskii +3
The Unspent Transaction Output (UTXO) model is commonly used in the field of Distributed Ledger Technology (DLT) to transfer value between participants. One of its advantages is th…
Feedback control for distributed ledgers: An attack mitigation policy for DAG-based DLTs
Pietro Ferraro, Andreas Penzkofer, Christopher King +1
In this paper we present a feedback approach to the design of an attack mitigation policy for DAG-based Distributed Ledgers. We develop a model to analyse the behaviour of the ledg…
Salt-based autopeering for DLT-networks
Sebastian Müller, Angelo Capossele, Bartosz Kuśmierz +6
The security of any Distributed Ledger Technology (DLT) depends on the safety of the network layer. Much effort has been put into understanding the consensus layer of DLTs. However…
Impact of delay classes on the data structure in IOTA
Andreas Penzkofer, Olivia Saa, Daria Dziubałtowska
In distributed ledger technologies (DLTs) with a directed acyclic graph (DAG) data structure, a message-issuing node can decide where to append that message and, consequently, how…
On Fairness in Voting Consensus Protocols
Sebastian Müller, Andreas Penzkofer, Darcy Camargo +1
Voting algorithms have been widely used as consensus protocols in the realization of fault-tolerant systems. These algorithms are best suited for distributed systems of nodes with…
Fast Probabilistic Consensus with Weighted Votes
Sebastian Müller, Andreas Penzkofer, Bartosz Kuśmierz +2
The fast probabilistic consensus (FPC) is a voting consensus protocol that is robust and efficient in Byzantine infrastructure. We propose an adaption of the FPC to a setting where…
Parasite Chain Detection in the IOTA Protocol
Andreas Penzkofer, Bartosz Kusmierz, Angelo Capossele +2
In recent years several distributed ledger technologies based on directed acyclic graphs (DAGs) have appeared on the market. Similar to blockchain technologies, DAG-based systems a…
Properties of the Tangle for Uniform Random and Random Walk Tip Selection
Bartosz Kusmierz, William Sanders, Andreas Penzkofer +2
The growing number of applications for distributed ledger technologies is driving both industry and academia to solve the limitations of blockchain, particularly its scalability is…
Robustness and efficiency of leaderless probabilistic consensus protocols within Byzantine infrastructures
Angelo Capossele, Sebastian Mueller, Andreas Penzkofer
This paper investigates leaderless binary majority consensus protocols with low computational complexity in noisy Byzantine infrastructures. Using computer simulations, we show tha…