Publications by Aikaterini Mitrokotsa

On Selecting the Nonce Length in Distance-Bounding Protocols

Serge Vaudenay, Christos Dimitrakakis, Aikaterini Mitrokotsa

Distance-bounding protocols form a family of challenge–response authentication protocols that have been introduced to thwart relay attacks. They enable a verifier to authenticate and to establish an upper bound on the physical distance to an untrusted prov ...

2013

The Bussard-Bagga and Other Distance-Bounding Protocols under Attacks

Serge Vaudenay, Aikaterini Mitrokotsa, Asli Bay, Iosif-Daniel Spulber

The communication between an honest prover and an honest verifier can be intercepted by a malicious man-in-the-middle (MiM), without the legitimate interlocutors noticing the intrusion. The attacker can simply relay messages from one party to another, even ...

Springer,2012

On the Pseudorandom Function Assumption in (Secure) Distance-Bounding Protocols

Serge Vaudenay, Aikaterini Mitrokotsa

In this paper, we show that many formal and informal security results on distance-bounding (DB) protocols are incorrect/incomplete. We identify that this inadequacy stems from the fact that the pseudorandom function (PRF) assumption alone, invoked in many ...

Springer2012

Evaluation of classification algorithms for intrusion detection in MANETs

Aikaterini Mitrokotsa

Mobile Ad hoc Networks (MANETs) are wireless networks without fixed infrastructure based on the cooperation of independent mobile nodes. The proliferation of these networks and their use in critical scenarios (like battlefield communications or vehicular n ...

Elsevier Science Bv2012

Expected loss bounds for authentication in constrained channels

Serge Vaudenay, Christos Dimitrakakis, Aikaterini Mitrokotsa

We derive bounds on the expected loss for authenti-cation protocols in channels which are constrained due to noisyconditions and communication costs. This is motivated by anumber of authentication protocols, where at least some partof the authentication is ...

Ieee2012

Mafia Fraud Attack against the RC Distance-Bounding Protocol

Serge Vaudenay, Aikaterini Mitrokotsa

At ACM~CCS 2008, Rasmussen and Capkun introduced a distance-bounding protocol RC07 (henceforth RC protocol) where the prover and verifier use simultaneous transmissions and the verifier counts the delay between sending a challenge (starting with a hidden m ...

IEEE2012

A Note on a Privacy-Preserving Distance-Bounding Protocol

Aikaterini Mitrokotsa, Jean-Philippe Aumasson

Distance bounding protocols enable a device to establish an upper bound on the physical distance to a communication partner so as to prevent location spoofing, as exploited by relay attacks. Recently, Rasmussen and Cˇapkun (ACM-CCS’08) observed that these ...

Springer2011

Expected loss analysis of thresholded authentication protocols in noisy conditions

Serge Vaudenay, Christos Dimitrakakis, Aikaterini Mitrokotsa

A number of authentication protocols have been proposed recently, where at least some part of the authentication is performed during a phase, lasting

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rounds, with no error correction. This requires assigning an acceptable threshold for the number of de ...

2010

Statistical Decision Making for Authentication and Intrusion Detection

Christos Dimitrakakis, Aikaterini Mitrokotsa

User authentication and intrusion detection differ from standard classification problems in that while we have data generated from legitimate users, impostor or intrusion data is scarce or non-existent. We review existing techniques for dealing with this p ...

2009

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On Selecting the Nonce Length in Distance-Bounding Protocols

The Bussard-Bagga and Other Distance-Bounding Protocols under Attacks

On the Pseudorandom Function Assumption in (Secure) Distance-Bounding Protocols

Evaluation of classification algorithms for intrusion detection in MANETs

Expected loss bounds for authentication in constrained channels

Mafia Fraud Attack against the RC Distance-Bounding Protocol

A Note on a Privacy-Preserving Distance-Bounding Protocol

Expected loss analysis of thresholded authentication protocols in noisy conditions

Statistical Decision Making for Authentication and Intrusion Detection

On the Pseudorandom Function Assumption in (Secure) Distance-Bounding Protocols

A Note on a Privacy-Preserving Distance-Bounding Protocol

Expected loss analysis of thresholded authentication protocols in noisy conditions

Evaluation of classification algorithms for intrusion detection in MANETs

The Bussard-Bagga and Other Distance-Bounding Protocols under Attacks

Mafia Fraud Attack against the RC Distance-Bounding Protocol

Statistical Decision Making for Authentication and Intrusion Detection

Expected loss bounds for authentication in constrained channels

On Selecting the Nonce Length in Distance-Bounding Protocols