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Ralf Schaffelhofer

Deutsche Telekom

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Publication

Featured researches published by Ralf Schaffelhofer.

Archive | 2001

Tree-Based Multicast Key Agreement

Jörg Schwenk; Tobias Martin; Ralf Schaffelhofer

We present an analysis of a multicast key agreement scheme based on the iterated Diffie-Hellman key agreement protocol and binary trees. This scheme is extremely efficient for deleting single members from the group and joining of groups. It does not need a group moderator, and is self-synchronizing.

Archive | 2000

Method for implementing a cryptographic algorithm

Eva Saar; Ralf Schaffelhofer

Archive | 2002

Method for compressing data

Klaus Huber; Peter Windirsch; Tim Schneider; Ralf Schaffelhofer; Matthias Baumgart

international conference on communications | 2001

Tree-based Key Agreement for Multicast

Tobias Martin; Ralf Schaffelhofer; Jörg Schwenk

Archive | 2000

Method for establishing a common key for a group of at least three subscribers

Tobias Martin; Ralf Schaffelhofer; Joerg Schwenk

Archive | 2002

Verfahren zur Kompression von Daten A method of compressing data

Matthias Baumgart; Huber; Windirsch; Ralf Schaffelhofer; Tim Schneider

Archive | 2001

Method for specifying a key for a group of at least three subscribers

Tobias Martin; Ralf Schaffelhofer; Joerg Schwenk

Archive | 2000

Process for increasing data security of cryptosystems implementations

Ralf Schaffelhofer; Eva Saar

Archive | 1999

Verfahren zur Schlüsselvereinbarung für eine Gruppe von mindestens drei Teilnehmern Method for key agreement for a group of three or more participants

Tobias Martin; Ralf Schaffelhofer; Joerg Schwenk

Archive | 1999

Verfahren zur Erhöhung der Datensicherheit von Implementierungen kryptographischer Algorithmen A method for increasing the data security of implementations of cryptographic algorithms

Ralf Schaffelhofer; Eva Saar

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Collaboration

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Tobias Martin

Deutsche Telekom

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Eva Saar

Deutsche Telekom

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Joerg Schwenk

Deutsche Telekom

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Jörg Schwenk

Ruhr University Bochum

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Matthias Baumgart

Deutsche Telekom

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Tim Schneider

Deutsche Telekom

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Klaus Huber

Deutsche Telekom

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Peter Windirsch

Deutsche Telekom

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