Concept

Off-the-Record Messaging

Related publications (23)

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Matryoshka: Hiding Secret Communication in Plain Sight

Christina Fragouli, Iris Safaka

We want to enable a pair of communicating users to exchange secret messages while hiding the fact that secret communication is taking place. We propose a linguistic steganography approach, where each human message is hidden in another human-like message. A ...

2016

Building Security Protocols Against Powerful Adversaries

Iris Safaka

As our sensitive data is increasingly carried over the Internet and stored remotely, security in communications becomes a fundamental requirement. Yet, today's security practices are designed around assumptions the validity of which is being challenged. In ...

EPFL2016

Distributed Authentication in Anonymous Mobile Communities

Hamza Harkous

With the recent boom in smartphones technology, online social networks are going mobile. This trend urged phone manufacturers and social networking companies to seek novel business strategies to monetize from these new "gateways" and to give the users ...

2012

Secret message capacity of erasure broadcast channels with feedback

Christina Fragouli, Suhas Diggavi, László Czap, Vinod Malathidevi Prabhakaran

We characterize the secret message capacity of a wiretapped erasure channel where causal channel state informa- tion of the honest nodes is publicly available. In doing so, we establish an intimate connection between message secrecy and secret key generati ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2011

SOWER: Self-Organizing Wireless Network for Messaging

Jean-Pierre Hubaux, Mark Felegyhazi, Srdan Capkun

Short Message Service (SMS) has become extremely popular in many countries, and represents a multi-billion dollars market. Yet many consumers consider that the price cellular network operators charge for it is too high. In this paper, we explain that there ...

2004

SOWER: Self-Organizing Wireless Network for Messaging

Jean-Pierre Hubaux, Mark Felegyhazi, Srdan Capkun

Short Message Service (SMS) has become extremely popular in many countries, and represents a multi-billion dollars market. Yet many consumers consider that the price charged by the cellular network operators is too high. In this paper, we explain that ther ...

2004

Quantifying the Performance Differences Between PVM and TreadMarks

Willy Zwaenepoel, Sandhya Dwarkadas

We compare two systems for parallel programming on networks of workstations: Parallel Virtual Machine (PVM) a message passing system, and TreadMarks, a software distributed shared memory (DSM) system. We present results for eight applications that were imp ...

1997

On the Implementation and Use of Message Logging

Willy Zwaenepoel

We present a number of experiments showing that for compute-intensive applications executing in parallel on clusters of workstations, message logging has higher failure-free overhead than coordinated checkpointing. Message logging protocols, however, resul ...

1994

Recovery in Distributed Systems Using Optimistic Message Logging and Checkpointing

Willy Zwaenepoel

Message logging and check pointing can provide fault tolerance in distributed systems in which all process communication is through messages. This paper presents a general model for reasoning about recovery in these systems. Using this model_ we prove that ...

1990

Recovery in Distributed Systems Using Optimistic Message Logging and Checkpointing

Willy Zwaenepoel

In a distributed system using message logging and checkpointing to provide fault tolerance, there is always a unique maximum recoverable system state, regardless of the message logging protocol used. The proof of this relies on the observation that the set ...

1988