Publications by Imad Aad | EPFL Graph Search

Zero-knowledge proof

Zero-knowledge proofs are techniques to verify claims without revealing the information itself. In this process, a "prover" shares proof of their claim with a "verifier, " who then verifies the accuracy of the proof without learning any additional informat ...

Springer Nature2023

Disk, file and database encryption

Linus Gasser, Imad Aad

Disk, file, and database encryption are technologies that protect data confidentiality when stored. Full disk encryption encrypts all data on a disk except the part containing the code to unlock the rest of the disk, which is usually not encrypted. File-ba ...

Springer Nature2023

Privacy-Preserving Optimal Meeting Location Determination on Mobile Devices

Jean-Pierre Hubaux, Imad Aad, Igor Bilogrevic, Vishal Joneja, Murtuza Jadliwala

Equipped with state-of-the-art smartphones and mobile devices, today's highly interconnected urban population is increasingly dependent on these gadgets to organize and plan their daily lives. These applications often rely on current (or preferred) locatio ...

Ieee-Inst Electrical Electronics Engineers Inc2014

From big smartphone data to worldwide research: The Mobile Data Challenge

Olivier Dousse, Imad Aad, Julien Eberle, Daniel Gatica-Perez

This paper presents an overview of the Mobile Data Challenge (MDC), a large-scale research initiative aimed at generating innovations around smartphone-based research, as well as community-based evaluation of mobile data analysis methodologies. First, we r ...

Elsevier Science Bv2013

Big Brother Knows Your Friends: on Privacy of Social Communities in Pervasive Networks

Jean-Pierre Hubaux, Imad Aad, Igor Bilogrevic, Laurent Bindschaedler, Murtuza Jadliwala, Valtteri Niemi

Wireless network operators increasingly deploy WiFi hotspots and low-power, low-range base stations in order to satisfy users' growing demands for context-aware services and performance. In addition to providing better service, such capillary infrastructur ...

2012

Track Me If You Can: On the Effectiveness of Context-based Identifier Changes in Deployed Mobile Networks

Jean-Pierre Hubaux, Imad Aad, Igor Bilogrevic, Laurent Bindschaedler, Murtuza Jadliwala, Valtteri Niemi

Location privacy is a major concern in an increasingly connected and highly pervasive network of mobile users. Novel location-based applications and device-to-device services (on these mobile devices) are gaining popularity, but at the same time, these ser ...

Internet Society2012

Meetings through the Cloud: Privacy-Preserving Scheduling on Mobile Devices

Jean-Pierre Hubaux, Imad Aad, Igor Bilogrevic, Murtuza Jadliwala, Valtteri Niemi

Mobile devices are increasingly being used to store and manage users' personal information, as well as to access popular third-party context-based services. Very often, these applications need to determine common availabilities among a set of user schedule ...

Elsevier2011

Privacy-Triggered Communications in Pervasive Social Networks

Jean-Pierre Hubaux, Julien Freudiger, Imad Aad, Murtuza Jadliwala, Valtteri Niemi

2011

Privacy in Mobile Computing for Location-Sharing-Based Services

Jean-Pierre Hubaux, Imad Aad, Igor Bilogrevic, Murtuza Jadliwala

Location-Sharing-Based Services (LSBS) complement Location-Based Services by using locations from a group of users, and not just individuals, to provide some contextualized service based on the locations in the group. However, there are growing concerns ab ...

Springer2011

Privacy-Preserving Activity Scheduling on Mobile Devices

Jean-Pierre Hubaux, Imad Aad, Igor Bilogrevic, Murtuza Jadliwala, Valtteri Niemi

Progress in mobile wireless technology has resulted in the increased use of mobile devices to store and manage users' personal schedules. Users also access popular context-based services, typically provided by third-party providers, by using these devices ...

ACM2011

Methods for efficient certificate revocation list compression

Serge Vaudenay, Rafik Chaabouni, Imad Aad, Valtteri Niemi, Atefeh Mashatan

A method for providing efficient management of certificate revocation may comprise storing a list of identifiers of digital certificates including a revocation list defining a list of revoked certificates in an accumulator, storing a witness value in assoc ...

2010

Impact of Denial of Service Attacks on Ad Hoc Networks

Jean-Pierre Hubaux, Imad Aad

Significant progress has been made towards making ad hoc networks secure and DoS resilient. However, little attention has been focused on quantifying DoS resilience: Do ad hoc networks have sufficiently redundant paths and counter-DoS mechanisms to make Do ...

2008

Eviction of Misbehaving and Faulty Nodes in Vehicular Networks

Jean-Pierre Hubaux, Daniel Jungels, Maxime Raya, Imad Aad, Panagiotis Papadimitratos

Vehicular Networks (VNs) are emerging, among civilian applications, as a convincing instantiation of the mobile networking technology. However, security is a critical factor and a significant challenge to be met. Misbehaving or faulty network nodes have to ...

2007

DOMINO: Detecting MAC layer greedy behavior in IEEE 802.11 hotspots

Jean-Pierre Hubaux, Maxime Raya, Imad Aad, Alaeddine El Fawal

IEEE 802.11 works properly only if the stations respect the MAC protocol. We show in this paper that a greedy user can substantially increase his share of bandwidth, at the expense of the other users, by slightly modifying the driver of his network adapter ...

2006

Enhancing IEEE 802.11 MAC in congested environments

Imad Aad

IEEE 802.11 is currently the most deployed wireless local area networkingstandard. It uses carrier sense multiple access with collision avoidance (CSMA/CA) to resolve contention between nodes. Contention windows (CW) change dynamically to adapt to the cont ...

Elsevier2005

Misbehaving detection method for contention-based wireless communications

Jean-Pierre Hubaux, Maxime Raya, Imad Aad

The aim of the present invention is to provide a method to detect misbehavior use of the IEEE 802.11 standard without modifying the standard itself. This aim is reached according to a method for detecting misbehavior in a contention based communication net ...

2005