Lecture

Metadata-Hiding Communication Systems

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In course

COM-506: Seminar on applied cryptography

This seminar introduces the participants to the current trends, problems, and methods in the area of communication security. ...

Description

This lecture discusses two systems, Express and Tor, used for secure communication. Express focuses on hiding metadata, ensuring immunity against traffic analysis. It uses distributed point functions to send messages to two servers, maintaining constant communication cost regardless of the number of mailboxes. The system is compared to Tor, which provides anonymity but collects metadata. The lecture also covers related works like Repost and Pung, highlighting Express's performance improvements. The presentation delves into system design, security measures, and potential attacks, offering insights into the practicality and limitations of metadata-hiding communication systems.

Instructor

Serge Vaudenay

Serge Vaudenay entered at the Ecole Normale Supérieure in 1989 with a major in mathematics. He earned his agrégation (secondary teaching degree) in mathematics in 1992, then a PhD in Computer Science at the University of Paris 7 - Denis Diderot in 1995. He subsequently became a senior research fellow at the CNRS, prior to being granted his habilitation à diriger des recherches (a postdoctoral degree authorizing the recipient to supervise doctoral students). In 1999, he was appointed as a Professor at the EPFL, where he created the Security and Cryptography Laboratory.

Official source

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Physical security

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National security

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Airport security

Airport security includes the techniques and methods used in an attempt to protect passengers, staff, aircraft, and airport property from malicious harm, crime, terrorism, and other threats. Aviation security is a combination of measures and human and material resources in order to safeguard civil aviation against acts of unlawful interference. Unlawful interference could be acts of terrorism, sabotage, threat to life and property, communication of false threat, bombing, etc. Large numbers of people pass through airports every day.

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