98 citations · 217 across the 18 of their papers we have counts for
22 papers
BlowLive: Blow-Based Multi-Factor Biometrics with Liveness Detection and Revocability
Eyasu Getahun Chekole, Howard Halim, Daniël Reijsbergen +1
Biometric authentication systems are increasingly deployed in security-critical applications, yet existing physiological and behavioral biometrics suffer from fundamental limitatio…
BlowPrint: Blow-Based Multi-Factor Biometrics for Smartphone User Authentication
Howard Halim, Eyasu Getahun Chekole, Daniël Reijsbergen +1
Biometric authentication is a widely used security mechanism that leverages unique physiological or behavioral characteristics to authenticate users. In multi-factor biometrics (MF…
ZK-SERIES: Privacy-Preserving Authentication using Temporal Biometric Data
Daniel Reijsbergen, Eyasu Getahun Chekole, Howard Halim +1
Biometric authentication relies on physiological or behavioral traits that are inherent to a user, making them difficult to lose, forge or forget. Biometric data with a temporal co…
PIEChain -- A Practical Blockchain Interoperability Framework
Daniël Reijsbergen, Aung Maw, Jingchi Zhang +2
A plethora of different blockchain platforms have emerged in recent years, but many of them operate in silos. As such, there is a need for reliable cross-chain communication to ena…
Optimality Despite Chaos in Fee Markets
Stefanos Leonardos, Daniël Reijsbergen, Barnabé Monnot +1
Transaction fee markets are essential components of blockchain economies, as they resolve the inherent scarcity in the number of transactions that can be added to each block. In ea…
TAP: Transparent and Privacy-Preserving Data Services
Daniel Reijsbergen, Aung Maw, Zheng Yang +2
Users today expect more security from services that handle their data. In addition to traditional data privacy and integrity requirements, they expect transparency, i.e., that the…
Protecting the Integrity of IoT Sensor Data and Firmware With A Feather-Light Blockchain Infrastructure
Daniel Reijsbergen, Aung Maw, Sarad Venugopalan +3
Smart cities deploy large numbers of sensors and collect a tremendous amount of data from them. For example, Advanced Metering Infrastructures (AMIs), which consist of physical met…
Securing Smart Grids Through an Incentive Mechanism for Blockchain-Based Data Sharing
Daniel Reijsbergen, Aung Maw, Tien Tuan Anh Dinh +2
Smart grids leverage the data collected from smart meters to make important operational decisions. However, they are vulnerable to False Data Injection (FDI) attacks in which an at…
Transparent Electricity Pricing with Privacy
Daniel Reijsbergen, Zheng Yang, Aung Maw +2
Smart grids leverage data from smart meters to improve operations management and to achieve cost reductions. The fine-grained meter data also enable pricing schemes that simultaneo…
Dynamical Analysis of the EIP-1559 Ethereum Fee Market
Stefanos Leonardos, Barnabé Monnot, Daniël Reijsbergen +2
Participation in permissionless blockchains results in competition over system resources, which needs to be controlled with fees. Ethereum's current fee mechanism is implemented vi…
A spatial algorithm for the analysis of transportation systems using statistical model checking
Daniël Reijsbergen, Stephen Gilmore
We present an automated methodology for using Automatic Vehicle Location measurements of public transportation vehicles to construct a probabilistic model. The model not only allow…
Decentralized Lightweight Detection of Eclipse Attacks on Bitcoin Clients
Bithin Alangot, Daniel Reijsbergen, Sarad Venugopalan +1
Clients of permissionless blockchain systems, like Bitcoin, rely on an underlying peer-to-peer network to send and receive transactions. It is critical that a client is connected t…
LaKSA: A Probabilistic Proof-of-Stake Protocol
Daniel Reijsbergen, Pawel Szalachowski, Junming Ke +2
We present Large-scale Known-committee Stake-based Agreement (LaKSA), a chain-based Proof-of-Stake protocol that is dedicated, but not limited, to cryptocurrencies. LaKSA minimizes…
On Exploiting Transaction Concurrency To Speed Up Blockchains
Daniël Reijsbergen, Tien Tuan Anh Dinh
Consensus protocols are currently the bottlenecks that prevent blockchain systems from scaling. However, we argue that transaction execution is also important to the performance an…
The Security Reference Architecture for Blockchains: Towards a Standardized Model for Studying Vulnerabilities, Threats, and Defenses
Ivan Homoliak, Sarad Venugopalan, Qingze Hum +3
Blockchains are distributed systems, in which security is a critical factor for their success. However, despite their increasing popularity and adoption, there is a lack of standar…
An Empirical Study into the Success of Listed Smart Contracts in Ethereum
Pieter Hartel, Ivan Homoliak, Daniël Reijsbergen
Since it takes time and effort to put a new product or service on the market, one would like to predict whether it will be a success. In general this is not possible, but it is pos…
StrongChain: Transparent and Collaborative Proof-of-Work Consensus
Pawel Szalachowski, Daniel Reijsbergen, Ivan Homoliak +1
Bitcoin is the most successful cryptocurrency so far. This is mainly due to its novel consensus algorithm, which is based on proof-of-work combined with a cryptographically-protect…
Weighted Voting on the Blockchain: Improving Consensus in Proof of Stake Protocols
Stefanos Leonardos, Daniel Reijsbergen, Georgios Piliouras
Proof of Stake (PoS) protocols rely on voting mechanisms to reach consensus on the current state. If an enhanced majority of staking nodes, also called validators, agree on a propo…
Incentives in Ethereum's Hybrid Casper Protocol
Vitalik Buterin, Daniel Reijsbergen, Stefanos Leonardos +1
We present an overview of hybrid Casper the Friendly Finality Gadget (FFG): a Proof-of-Stake checkpointing protocol overlaid onto Ethereum's Proof-of-Work blockchain. We describe i…
Path-ZVA: general, efficient and automated importance sampling for highly reliable Markovian systems
Daniel Reijsbergen, Pieter-Tjerk de Boer, Werner Scheinhardt +1
We introduce Path-ZVA: an efficient simulation technique for estimating the probability of reaching a rare goal state before a regeneration state in a (discrete-time) Markov chain.…
Rethinking Blockchain Security: Position Paper
Vincent Chia, Pieter Hartel, Qingze Hum +5
Blockchain technology has become almost as famous for incidents involving security breaches as for its innovative potential. We shed light on the prevalence and nature of these inc…
Probabilistic Modelling of the Impact on Bus Punctuality of a Speed Limit Proposal in Edinburgh (Extended Version)
Daniël Reijsbergen, Rajeev Ratan
We propose a data-driven methodology for evaluating the impact of the introduction of a speed limit on the punctuality of bus services. In particular, we use high-frequency Automat…