[HGI-News-de] Kolloquium: "Playing Games in UC" - Sebastian Gajek - Freitag, 01. April 2011
Newsletter des Horst Görtz Instituts
hgi-news-deutschland at lists.ruhr-uni-bochum.de
Do Mär 24 16:38:41 CET 2011
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Sehr geehrte Damen und Herren,
im Rahmen des HGI-Kolloquiums organisiert
vom Lehrstuhl für Netz- und Datensicherheit (NDS), wird Sebastian Gajek
von der Tel-Aviv University, Israel am nächsten Freitag, den 01.
April 2011 über "Playing Games in UC" referieren.
Der Vortrag beginnt um 11.00 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/
Abstract:
Universally Composable (UC) security provides a very strong
guarantee: A UC-secure protocol maintains its security
properties when used in any execution environment. In many
cases, however, full universal composability is not required;
milder and more specific composability guarantees suffice.
We formulate a refinement of UC security, called UC with
Specialized Environments (SPUC), that allows asserting and
proving security properties that withstand only partial and
restricted composition operations. The refined operation
provides a versatile and powerful tool for asserting security
properties for realistic protocols. For instance, it can be used
to capture several (global) trusted set-up assumptions, network
and input restrictions, and game-based notions of security. In
fact, we show that game-based definitions can be casted as a
special case of our framework.
We then demonstrate the power of SPUC security by using it to
capture for the first time the security properties of
CPA-secure symmetric encryption and message authentication
codes, as single instance protocols in a composable security
framework. This allows us to analyze the security of hybrid
encryption, and several common secure communication
session protocols in a way that is modular, abstract, and
amenable to efficient automation.
Joint work with Ran Canetti.
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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