[HGI-News-de] HGI-Kolloquium: Information Theoretic Secrecy in Broadcast Channels with Receiver Side Information - Aydin Sezgin - Mittwoch, 08. Mai

[Newsletter des Horst Görtz Instituts]

Sehr geehrte Damen und Herren, 


im Rahmen des HGI-Kolloquiums organisiert vom Lehrstuhl für Netz- und Datensicherheit (NDS), wird

        Aydin Sezgin

von der 

        Universität Ulm

 am 

        am kommenden Mittwoch um 12.00 Uhr s.t. in Raum ID 03/411

über folgendes Thema referieren:


Information Theoretic Secrecy in Broadcast Channels with Receiver Side Information
The conventional way to achieve confidentiality is by using 
cryptographic encryption based on keys.  While this approach has both it 
advantages and disadanvtages, the information theoretic approach can be 
regarded as a powerful alternative or as an additional level of 
protection to achieve security in wireless networks.  This approach 
guarantees both reliability and security, which the other approach can not.

We utilize this approach in the study of secret communication for 
broadcast channels with two legitimate receivers and one eavesdropper. 
The transmitter sends two independent confidential messages to both 
legitimate receivers which have to be kept secret from the eavesdropper. 
Here, each receiver is interested in its own message having the other 
confidential message already as side information available. This problem 
arises for example in the broadcast phase of a bidirectional relaying 
network, where a relay node establishes a bidirectional communication 
between two nodes while keeping the communication secure from 
eavesdroppers outside the network. We provide inner and outer bounds on 
the secrecy capacity region. For the inner bound, the transmitter adds 
intentionally structural randomness in form of stochastic coding, 
effectively jamming the eavesdropper while guaranteeing that the desired 
users get the information reliably. The outer and inner bounds do not 
coincide, however they provide some interesting insights.



Der Vortrag beginnt am Mittwoch um 12.00 Uhr s.t. im ID 03/411.

Zu diesem und sämtlichen weiteren Vorträgen im Rahmen des HGI-Kolloquiums sind alle Studierenden und Interessierten herzlich eingeladen! Eine Voranmeldung ist nicht erforderlich!

Weitere Informationen gibt es auf folgender Webseite:

    http://hgi.rub.de/hgi/hgi-seminar/aktuelles/


Beste Grüße, 
Florian Kohlar






































-- 
Dipl.-Ing. Florian Kohlar

Lehrstuhl für Netz- und Datensicherheit
Ruhr Universität Bochum
-----------------------------------
Universitätsstr. 150, Geb. ID 2/457
D-44780 Bochum

Telefon: +49 (0) 234 / 32-26798
Fax: +49 (0) 234 / 32-14347
http://www.nds.rub.de


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