23 citations · 46 across the 13 of their papers we have counts for
13 papers
Rent-a-RAG: Embedding-Space Watermarks for Auditing Third-Party RAG
Alexandr Goultiaev Tolstokorov, Kyriakos Mouratidis, Javad Dogani +1
Third-party retrieval-augmented generation (RAG) marketplaces create a new auditing problem: data providers may license corpora to a RAG operator, yet later have no visibility into…
FedPoP: Federated Learning Meets Proof of Participation
Devriş İşler, Elina van Kempen, Seoyeon Hwang +1
Federated learning (FL) offers privacy preserving, distributed machine learning, allowing clients to contribute to a global model without revealing their local data. As models incr…
Reducing Street Parking Search Time via Smart Assignment Strategies
Behafarid Hemmatpour, Javad Dogani, Nikolaos Laoutaris
In dense metropolitan areas, searching for street parking adds to traffic congestion. Like many other problems, real-time assistants based on mobile phones have been proposed, but…
FreqyWM: Frequency Watermarking for the New Data Economy
Devriş İşler, Elisa Cabana, Alvaro Garcia-Recuero +2
We present a novel technique for modulating the appearance frequency of a few tokens within a dataset for encoding an invisible watermark that can be used to protect ownership righ…
Puppy: A Publicly Verifiable Watermarking Protocol
Devriş İşler, Seoyeon Hwang, Yoshimichi Nakatsuka +2
In this paper, we propose Puppy, the first formally defined framework for converting any symmetric watermarking into a publicly verifiable one. Puppy allows anyone to verify a wate…
HyperGraphDis: Leveraging Hypergraphs for Contextual and Social-Based Disinformation Detection
Nikos Salamanos, Pantelitsa Leonidou, Nikolaos Laoutaris +3
In light of the growing impact of disinformation on social, economic, and political landscapes, accurate and efficient identification methods are increasingly critical. This paper…
A Survey of Data Marketplaces and Their Business Models
Santiago Andrés Azcoitia, Nikolaos Laoutaris
"Data" is becoming an indispensable production factor, just like land, infrastructure, labor or capital. As part of this, a myriad of applications in different sectors require huge…
What Is the Price of Data? A Measurement Study of Commercial Data Marketplaces
Santiago Andrés Azcoitia, Costas Iordanou, Nikolaos Laoutaris
A large number of Data Marketplaces (DMs) have appeared in the last few years to help owners monetise their data, and data buyers fuel their marketing process, train their ML model…
Try Before You Buy: A practical data purchasing algorithm for real-world data marketplaces
Santiago Andrés Azcoitia, Nikolaos Laoutaris
Data trading is becoming increasingly popular, as evident by the appearance of scores of Data Marketplaces (DMs) in the last few years. Pricing digital assets is particularly compl…
Computing the Relative Value of Spatio-Temporal Data in Wholesale and Retail Data Marketplaces
Santiago Andrés Azcoitia, Marius Paraschiv, Nikolaos Laoutaris
Spatio-temporal information is used for driving a plethora of intelligent transportation, smart-city, and crowd-sensing applications. Since data is now considered a valuable produc…
Valuating User Data in a Human-Centric Data Economy
Marius Paraschiv, Nikolaos Laoutaris
The idea of paying people for their data is increasingly seen as a promising direction for resolving privacy debates, improving the quality of online data, and even offering an alt…
Who's Tracking Sensitive Domains?
Costas Iordanou, Georgios Smaragdakis, Nikolaos Laoutaris
We turn our attention to the elephant in the room of data protection, which is none other than the simple and obvious question: "Who's tracking sensitive domains?". Despite a fast-…
I Always Feel Like Somebody's Watching Me. Measuring Online Behavioural Advertising
J. M. Carrascosa, J. Mikians, R. Cuevas +2
Online Behavioural targeted Advertising (OBA) has risen in prominence as a method to increase the effectiveness of online advertising. OBA operates by associating tags or labels to…