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Number of items: 38.

König, André and Ackermann, Ralf and Hollick, Matthias and Steinmetz, Ralf (2006):
Geographically secure routing for mobile ad hoc networks : a cross-layer based approach.
In: International Conference on Emerging Trends in Information and Communication Security (ETRICS 2006) <Freiburg,2006>, [Conference or Workshop Item]

Ackermann, Ralf and Dittler, Hans Peter (2006):
IP-Telefonie mit Asterisk : Aufbau von Nebenstellenanlagen für VoIP auf Linux-Basis - inklusive SIP.
Heidelberg, dpunkt-Verl., ISBN 3-89864-370-0,
[Book]

Schmitt, Johannes and Ackermann, Ralf and Görtz, Manuel and Steinmetz, Ralf (2006):
VoIP-Sicherheit Status Quo und neue Aspekte.
In: D-A-CH <Klagenfurt,2006> ; 433-444, [Conference or Workshop Item]

Steinmetz, Ralf and Ackermann, Ralf (2005):
Medien in Digitalen Netzwerken.
1. Aufl.. - München [u.a.], Fachbuchverl. Leipzig im Carl Hanser Verl., In: Taschenbuch der Medieninformatik : mit 39 Tabellen / hrsg. von Kai Bruns .... - 1. Aufl.. - München [u.a.] : Fachbuchverl. Leipzig im Carl Hanser Verl., 2005. - S. 259-277 ISBN: 3-446-40299-3, [Book]

Meyer, Lutz and Leibold, H. and Mai, R. and Ackermann, Ralf and Schebek, Liselotte (2004):
Analysis of the exergetic performance of a novel hot gas cleaning facility.
In: World Biomass Conference <2, 2004, Roma>: Biomass for Energy, Industry and Climate Protection ; proceedings of the conference held in Rome, Italy 10 - 14 May 2004 / [Jointly organised by: Energia TA; WIP Munich]. Ed. by W.P.M Van Swaaij...- Florence : ETA, [Book Section]

Goertz, Manuel and Ackermann, Ralf and Schmitt, Johannes and Steinmetz, Ralf (2004):
Context-aware communication services : a framework for building enhanced IP telephony services.
Piscataway, NJ, IEEE Operations Center, In: International Conference on Computer Communications and Networks <13, 2004, Chicago, Ill.>: Proceedings ..., ICCCN 2004, 11 - 13 October 2004, Holiday Inn Chicago - O'Hare Intl, Chicago, IL, USA / sponsors: IEEE; IEEE Communications Society (Tech cosponso, [Conference or Workshop Item]

Goertz, Manuel and Ackermann, Ralf and Steinmetz, Ralf (2004):
Enhanced SIP communication services by context sharing.
In: EUROMICRO conference <30, 2004, Rennes>: Proceedings, 31 August - 3 September 2004, Rennes, France / ed.: Ralf Steinmetz ... Los Alamitos, Calif. [u.a.] : IEEE Computer Society, 2004.- XVI, 639 S.- ISBN: 0-7695-2199-1.- S. 272-281, [Conference or Workshop Item]

Gasafi, Edgar and Ackermann, Ralf and Schebek, Liselotte (2004):
Identification of dominant process steps of supercritical water gasification systems for bio-based feedstocks.
In: World Biomass Conference <2, 2004, Roma>: Biomass for Energy, Industry and Climate Protection ; proceedings of the conference held in Rome, Italy 10 - 14 May 2004 / [Jointly organised by: Energia TA; WIP Munich]. Ed. by W.P.M Van Swaaij...- Florence : ETA, Florence, ETA ; Munich : WIP, [Book Section]

Schebek, Liselotte and Düpmeier, C. and Ackermann, Ralf (2004):
Kompetenznetzwerk "Methoden in der Verfahrensentwicklung".
Düsseldorf, VDI-Verl., In: Prozessverbesserung und Umweltentlastung durch Systemtechnik : Tagung Karlsruhe, 11. März 2004 / VDI-Koordinierungsstelle Umwelttechnik.- Düsseldorf : VDI-Verl., 2004.- 97 S. : Ill., graph. Darst.- (VDI-Berichte ; 1822).-ISBN: 3-18-091822-5.- S. 87-97, [Conference or Workshop Item]

Martinovic, Ivan and Goertz, Manuel and Ackermann, Ralf and Mauthe, Andreas and Steinmetz, Ralf (2004):
Trust and context : two complementary concepts for creating spontaneous collaborative networks and intelligent applications.
In: International Conference on Software, Telecommunications and Computer Networks <2004, Split>: Proceedings ... SoftCOM, Split, Oct. 2004.- S. 106-110, [Conference or Workshop Item]

Goertz, Manuel and Ackermann, Ralf and Steinmetz, Ralf (2004):
The digital call assistant : determine optimal time slots for calls.
Berlin [u.a.], Springer, In: Interactive multimedia and next generation networks : second International Workshop on Multimedia Interactive Protocols and Systems, MIPS 2004, Grenoble, France, November 16 - 19, 2004 ; proceedings / Vincent Roca ... (ed.)-1. ed.- Berlin [u.a.] : Springe, [Conference or Workshop Item]

Ackermann, Ralf (2003):
Gateways and Components for Supplementary IP Telephony Services in Heterogeneous Environments.
Darmstadt, Technische Universität, TU Darmstadt, [Online-Edition: urn:nbn:de:tuda-tuprints-3591],
[Ph.D. Thesis]

Brucherseifer, Eva and Ackermann, Ralf (2003):
Design am Arbeitsplatz : den UNIX-Desktop KDE besser nutzen.
In: c't, pp. 196-199, [Article]

Ackermann, Ralf (2003):
Gateways and components for supplementary IP telephony services in heterogeneous environments.
Darmstadt, Techn. Univ., TU Darmstadt, [Ph.D. Thesis]

Görtz, Manuel and Ackermann, Ralf and Mauthe, Andreas and Steinmetz, Ralf (2003):
Using context informations to avoid service interactions in IP telephony.
Berlin [u.a.], Springer, In: International Workshop on Multimedia Interactive Protocols and Systems <1, 2003, Napoli>: Interactive multimedia on next generation networks ... proceedings MIPS 2003 / Giorgio Ventre ...ed.- Berlin [u.a.]: Springer, 2003.- XIV, 420 S.- (Lecture notes in, [Conference or Workshop Item]

Dittmann, Jana and Steinebach, Martin and Wohlmacher, Petra and Ackermann, Ralf (2002):
Digital watermarks enabling e-commerce strategies : conditional and user specific access to services and resources.
In: EURASIP journal on applied signal processing, pp. 174-184, [Article]

Steinmetz, Ralf and Ackermann, Ralf and Roedig, Utz and Goertz, Manuel and Schumacher, Markus (2002):
IP-Telefonie : Protokolle, Herausforderungen, Lösungen und kritische Analyse der Sicherheit.
In: Arbeitsgemeinschaft des VDE Rhein-Main: Presentation series ; [IP-Plattform für moderne Kommunikation 14.1.-4.2.2002, Frankfurt a. M.]- Frankfurt a.M., 2002.- S. 57-77, [Article]

Steinebach, Martin and Siebenhaar, Frank and Neubauer, Christian and Ackermann, Ralf and Roedig, Utz and Dittmann, Jana (2002):
Intrusion detection systems for IP telephony networks.
In: Real time intrusion detection: a symposium organised by the Information Systems Technology, Estoril, Portugal, May 2002. - Lisboa, 2002.- [Vortrag], [Conference or Workshop Item]

Görtz, Manuel and Ackermann, Ralf and Karsten, Martin and Steinmetz, Ralf (2002):
Using a multi-layer approach to tackle the service interaction problem in telephony scenarios.
Los Angeles, Calif [u.a.], IEEE Computer Soc., In: Proceedings / 28th EUROMICRO Conference : September 4-6, 2002, Dortmund, Germany / ed. Milagros Fernandez. - Los Angeles, Calif [u.a.] : IEEE Computer Soc., 2002. - S. 207-215, [Conference or Workshop Item]

Dittmann, Jana and Wohlmacher, Petra and Ackermann, Ralf and Wohlmacher, P. (2001):
Conditional and user specific access to services and resources using annotation watermarks.
Boston [u.a.], Kluwer, In: CMS 2001: Working Conference on Communications and Multimedia Security <5, 2001, Darmstadt>: Proceedings. S. 137-148. Hrsg.: R. Steinmetz. - Boston [u.a.]: Kluwer, 201, [Conference or Workshop Item]

Roedig, Utz and Ackermann, Ralf and Steinmetz, Ralf (2001):
IP-Telefonie und Firewalls, Probleme und Lösungen.
In: Praxis in der Informationsverarbeitung und Kommunikation (PIK), pp. S. 32-40, 24, [Article]

Ackermann, Ralf and Görtz, M. and Karsten, M. and Steinmetz, Ralf (2001):
Prototyping a PDA based communication appliance.
In: Softcom <2001, Split>: Proceedings. S. 739-746, [Conference or Workshop Item]

Ackermann, Ralf and Schumacher, M. and Roedig, U. and Steinmetz, Ralf (2001):
Vulnerabilities and security limitations of current IP telephony systems.
Boston [u.a.], Kluwer, In: CMS 2001: Working Conference on Communications and Multimedia Security <5, 2001, Darmstadt>: Proceedings. S. 53-66. Hrsg.: R. Steinmetz. - Boston [u.a.]: Kluwer, 2001, [Conference or Workshop Item]

Ackermann, Ralf and Darlagiannis, V. and Görtz, M. and Karsten, M. and Steinmetz, Ralf (2001):
An open source H.323-SIP gateway as basis for supplementary service interworking.
In: IP Telephony Workshop <2, 2001, New York>: Proceedings. S. 169-175, [Conference or Workshop Item]

Ackermann, Ralf and Roedig, U. and Zink, M. and Griwodz, C. and Steinmetz, Ralf (2000):
Associating network flows with user and application information.
In: ACM Multimedia Workshop Security <2000, Los Angeles>: Proceedings. S. 149-152, [Conference or Workshop Item]

Ackermann, Ralf and Roedig, U. and Steinmetz, Ralf (2000):
Entwicklung und Nutzung von IP-Telefonie Anwendungen auf Unix-Systemen.
In: GUUG-Nachrichten, pp. S. 37-41, [Article]

Roedig, Utz and Ackermann, Ralf and Steinmetz, Ralf (2000):
Evaluating and improving firewalls for IP-telephony environments.
St. Augustin, GMD Forschungszentrum Informationstechnik, In: IPTel 2000: Proceedings of the First IP-Telephony Workshop. Hrsg.: B. Butscher. - St. Augustin: GMD Forschungszentrum Informationstechnik, 2000 = GMD-Report; 95. S. 161-166, [Conference or Workshop Item]

Ackermann, Ralf (2000):
Firewalls and their impact on multimedia systems.
Bellingham, Wash., SPIE, In: Multimedia computing and networking 2000. Hrsg.: K. Nahrstedt. - Bellingham, Wash.: SPIE, 2000 = SPIE Proceedings; 3969. S. 284, [Conference or Workshop Item]

Ackermann, Ralf and Rensing, C. and Noll-Hussong, S. and Wolf, L. and Steinmetz, Ralf (2000):
SSS4it - secure session setup für Internet-Telefonie.
In: Systemsicherheit 2000 <2000, Bremen>: Tagungsbd. S. 140-150, [Conference or Workshop Item]

Darlagiannis, Vasilios and Ackermann, Ralf and El-Saddik, A. and Georganas, N. and Steinmetz, Ralf (2000):
Suitability of Java for virtual collaboration.
In: Net.ObjectDays <2000, Erfurt>: Proceedings, [Conference or Workshop Item]

Schumacher, Markus and Ackermann, Ralf and Steinmetz, Ralf (2000):
Towards security at all stages of a system's life cycle.
In: SoftCOM 2000 : International Conference on Software, Telecommunications and Computer Networks; Proceedings of the Workshop on Contemporary Communications. S. 11-19, [Conference or Workshop Item]

Ackermann, Ralf and Darlagiannis, V. and Steinmetz, Ralf (2000):
Using DMIF for abstracting from IP-telephony signaling protocols.
Berlin (u.a.), Springer, In: IDMS 2000: Internatinal Workshop on Interactive Distributes Multimedia Systems and Telecommunication Services <7, 2000, Enschede>: Proceedings. Hrsg.: H. Scholten. - Berlin (u.a.): Springer, 2000 = Lecture notes in computer science; 1905. S. 104-115, [Conference or Workshop Item]

Roedig, Utz and Ackermann, Ralf and Tresse, M. and Wolf, L. and Steinmetz, Ralf (2000):
Verbesserte Systemsicherheit durch Kombination von IDS und Firewall.
In: Systemsicherheit 2000 <2000, Bremen>: Tagungsbd. S. 118-128, [Conference or Workshop Item]

Ackermann, Ralf and Pommitz, J. and Wolf, L. C. and Steinmetz, Ralf (1999):
Eine virtuelle PBX.
In: GI Multicast-Workshop <1, 1999, Braunschweig>: Tagungsbd. S. 187-197, [Conference or Workshop Item]

Ackermann, Ralf and Pommitz, J. and Wolf, L. C. and Steinmetz, Ralf (1999):
MBone2Tel - ein Gateway für die Teilnahme von Nutzern konventioneller Telefonendgeräte an MBone-Konferenzen.
In: ITG/TKTG-Fachtagung Multimedia: Anwendungen, Technologie, Systeme; 8. Dortmunder Fersehseminar; Tagungsbd. - Dortmund 1999. S. 237-240, [Conference or Workshop Item]

Ackermann, Ralf and Pommitz, J. and Wolf, L. C. and Steinmetz, Ralf (1999):
MBone2Tel - telephone users meeting the MBone.
In: IDMS'99: International Workshop on Interactive Distributed Multimedia Systems and Telecommunication Services <6, 1999, Toulouse>: Proceedings. S. 121-132, [Conference or Workshop Item]

Rensing, Christoph and Ackermann, Ralf and Roedig, U. and Wolf, L. C. and Steinmetz, Ralf (1999):
Sicherheitsunterstützung für Internet Telefonie.
In: DUD-Fachbeiträge 1999, März. - Braunschweig: Vieweg, 1999. S. 285-296, Braunschweig, Vieweg, [Book Section]

Rensing, Christoph and Rödig, Utz and Ackermann, Ralf and Wolf, L. C. and Steinmetz, Ralf (1999):
VDMFA: eine verteilte dynamische Firewallarchitektur für Multimedia-Dienste.
Berlin, Heidelberg (u.a.), springer, In: Kommunikation in Verteilten Systemen (KiVS): 11. ITG/GI-Fachtagung Darmstadt 1999. Hrsg.: R. Steinmetz. - Berlin, Heidelberg (u.a.): springer, 1999. S. 144-157, [Conference or Workshop Item]

This list was generated on Tue Oct 15 00:54:35 2019 CEST.