Concept
Kerberos (protocole)
Publications associées (42)
Anonymous Tokens with Stronger Metadata Bit Hiding from Algebraic MACs
Serge Vaudenay, Fatma Betül Durak
On the one hand, the web needs to be secured from malicious activities such as bots or DoS attacks; on the other hand, such needs ideally should not justify services tracking people's activities on the web. Anonymous tokens provide a nice tradeoff between ...
2023Optimal Symmetric Ratcheting for Secure Communication
Serge Vaudenay, Andrea Felice Caforio, Daniel Patrick Collins, Hailun Yan
To mitigate state exposure threats to long-lived instant messaging sessions, ratcheting was introduced, which is used in practice in protocols like Signal. However, existing ratcheting protocols generally come with a high cost. Recently, Caforio et al. pro ...
OXFORD UNIV PRESS2022On the Insecurity of Vehicles Against Protocol-Level Bluetooth Threats
Mathias Josef Payer, Daniele Antonioli
Cars are some of the most security-critical consumer devices. On the one hand, owners expect rich infotainment features, including audio, hands-free calls, contact management, or navigation through their connected mobile phone. On the other hand, the infot ...
IEEE COMPUTER SOC2022Verifiable Encodings for Secure Homomorphic Analytics
Jean-Pierre Hubaux, Sylvain Chatel, Apostolos Pyrgelis, Christian Louis Knabenhans
Homomorphic encryption, which enables the execution of arithmetic operations directly on ciphertexts, is a promising solution for protecting privacy of cloud-delegated computations on sensitive data. However, the correctness of the computation result is no ...
2022Key Negotiation Downgrade Attacks on Bluetooth and Bluetooth Low Energy
Bluetooth (BR/EDR) and Bluetooth Low Energy (BLE) are pervasive wireless technologies specified in the Bluetooth standard. The standard includes key negotiation protocols used to generate long-term keys (during pairing) and session keys (during secure conn ...
ASSOC COMPUTING MACHINERY2020Implications of Position in Cryptography
In our daily lives, people or devices frequently need to learn their location for many reasons as some services depend on the absolute location or the proximity. The outcomes of positioning systems can have critical effects e.g., on military, emergency. Th ...
EPFL2018Method for privacy-preserving medical risk test
Jean-Pierre Hubaux, Amalio Telenti, Erman Ayday, Jean Louis Raisaro
A privacy-preserving method for performing a disease susceptibility test on a patient, said method comprising: (I) performing homomorphic computations, (J) obtaining a test result which is partly decrypted with a first part (prk1 resp. prk2) of a private k ...
2016Towards 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 ...
2015Private Eyes: Secure Remote Biometric Authentication
We propose an efficient remote biometric authentication protocol that gives strong protection to the user’s biometric data in case of two common kinds of security breaches: (1) loss or theft of the user’s token (smart card, handheld device, etc.), giving t ...
SciTePress2015Bi-Modal Biometric Authentication on Mobile Phones in Challenging Conditions
Sébastien Marcel, Laurent El Shafey
This paper examines the issue of face, speaker and bi-modal authentication in mobile environments when there is significant condition mismatch. We introduce this mismatch by enrolling client models on high quality biometric samples obtained on a laptop com ...
2014