Publications by Iris Safaka | EPFL Graph Search

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A Heuristic Algorithm for Mobility-aware Location Obfuscation

Karl Aberer, Iris Safaka, Berker Agir, Malik Beytrison

Mobile users not only use on-demand location-based services increasingly (e.g., checking in on online social networks), but also other mobile applications that provide a service based on location traces of users (e.g., fitness tracking, health monitoring, ...

2016

Creating Secrets Out Of Packet Erasures

Christina Fragouli, László Czap, Iris Safaka

We present protocols for creating pairwise secrets between nodes in a wireless network, so that these secrets are secure from an eavesdropper, Eve, with unbounded computational and memory capabilities, but with limited network presence. We first present a ...

Ieee-Inst Electrical Electronics Engineers Inc2016

Efficient Key Exchange for Wireless Multi-hop Networks

Christina Fragouli, László Czap, Iris Safaka

We present a protocol that enables to create pairwise keys between nodes in a wireless network, so that the keys are secure from an adversary, Eve, with unbounded computational and memory capabilities, but with limited network presence. Our proposed protoc ...

2015

Towards Unconditional Tor-Like Anonymity

Christina Fragouli, László Czap, Iris Safaka

We design and evaluate a traffic anonymization protocol for wireless networks, aiming to protect against computationally powerful adversaries. Our protocol builds on recent key-generation techniques, that leverage intrinsic properties of the wireless toget ...

2015

Exchanging Pairwise Secrets Efficiently

Christina Fragouli, Suhas Diggavi, Iris Safaka

We consider the problem where a group of wireless nodes, connected to the same broadcast domain, want to create pairwise secrets, in the presence of an adversary Eve, who tries to listen in and steal these secrets. Existing solutions assume that Eve cannot ...

Institute of Electrical and Electronics Engineers Inc.2013

Low cost security for sensor networks

Christina Fragouli, Lorenzo Keller, Iris Safaka, Emre Atsan

We design and evaluate a lightweight encryption protocol suitable for sensor networks, that enables weak security in the presence of passive eavesdroppers. At every communication round, our protocol creates a key between each sensor node and the sink, by a ...

Institute of Electrical and Electronics Engineers Inc.2013

Creating Shared Secrets out of Thin Air

Christina Fragouli, Suhas Diggavi, Iris Safaka

Current security systems typically rely on the adversary's computational limitations (e.g., the fact that it cannot invert a hash function or perform large-integer factorization). Wireless networks offer the opportunity for a different, complementary kind ...

Assoc Computing Machinery2012

Iris Safaka

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Building Security Protocols Against Powerful Adversaries

A Heuristic Algorithm for Mobility-aware Location Obfuscation

Creating Secrets Out Of Packet Erasures

Matryoshka: Hiding Secret Communication in Plain Sight

Efficient Key Exchange for Wireless Multi-hop Networks

Towards Unconditional Tor-Like Anonymity

Exchanging Pairwise Secrets Efficiently

Low cost security for sensor networks

Creating Shared Secrets out of Thin Air

Building Security Protocols Against Powerful Adversaries

Creating Secrets Out Of Packet Erasures

Efficient Key Exchange for Wireless Multi-hop Networks

Towards Unconditional Tor-Like Anonymity

Matryoshka: Hiding Secret Communication in Plain Sight

Exchanging Pairwise Secrets Efficiently

Low cost security for sensor networks

Creating Shared Secrets out of Thin Air

A Heuristic Algorithm for Mobility-aware Location Obfuscation