| 2008 |
| 16 | | Jons-Tobias Wamhoff,
Eberhard Grummt,
Ralf Ackermann:
Routing Mechanism for Secure, Distributed Discovery Services for Global Auto-ID Networks.
IWRT 2008: 136-141 |
| 2005 |
| 15 | EE | Luka Divac-Krnic,
Ralf Ackermann:
Security-Related Issues in Peer-to-Peer Networks.
Peer-to-Peer Systems and Applications 2005: 529-545 |
| 2004 |
| 14 | EE | Manuel Görtz,
Ralf Ackermann,
Ralf Steinmetz:
Enhanced SIP Communication Services by Context Sharing.
EUROMICRO 2004: 272-279 |
| 13 | | Manuel Görtz,
Ralf Ackermann,
Johannes Schmitt,
Ralf Steinmetz:
Context-aware Communication Services: A Framework for Building Enhanced IP Telephony Services.
ICCCN 2004: 535-540 |
| 12 | EE | Manuel Görtz,
Ralf Ackermann,
Ralf Steinmetz:
The Digital Call Assistant: Determine Optimal Time Slots for Calls.
MIPS 2004: 230-241 |
| 2003 |
| 11 | EE | Manuel Görtz,
Ralf Ackermann,
Andreas Mauthe,
Ralf Steinmetz:
Using Context Information to Avoid Service Interactions in IP Telephony.
MIPS 2003: 340-351 |
| 2002 |
| 10 | EE | Manuel Görtz,
Ralf Ackermann,
Martin Karsten,
Ralf Steinmetz:
Using a Multi-Layer Approach to Tackle the Service Interaction Problem in Telephony Scenarios.
EUROMICRO 2002: 207-215 |
| 2001 |
| 9 | | Jana Dittmann,
Petra Wohlmacher,
Ralf Ackermann:
Conditional Access for Business and M-Commerce Applications using Annotation Watermarks.
Communications and Multimedia Security 2001 |
| 8 | | Ralf Ackermann,
Markus Schumacher,
Utz Roedig,
Ralf Steinmetz:
Vulnerabilities and Security Limitations of current IP Telephony Systems.
Communications and Multimedia Security 2001 |
| 7 | | Utz Roedig,
Ralf Ackermann,
Ralf Steinmetz:
IP-Telefonie und Firewalls, Probleme und Lösungen.
Praxis der Informationsverarbeitung und Kommunikation 24(1): (2001) |
| 2000 |
| 6 | EE | Ralf Ackermann,
Utz Roedig,
Michael Zink,
Carsten Griwodz,
Ralf Steinmetz:
Associating network flows with user and application information.
ACM Multimedia Workshops 2000: 149-152 |
| 5 | EE | Ralf Ackermann,
Vasilios Darlagiannis,
Utz Roedig,
Ralf Steinmetz:
Using DMIF for Abstracting from IP-Telephony Signaling Protocols.
IDMS 2000: 104-115 |
| 1999 |
| 4 | | Ralf Ackermann,
Jörg Pommnitz,
Lars C. Wolf,
Ralf Steinmetz:
MBone2Tel - Telephone Users Meeting the MBone.
IDMS 1999: 121-132 |
| 3 | | Christoph Rensing,
Utz Roedig,
Ralf Ackermann,
Lars C. Wolf,
Ralf Steinmetz:
VDMFA, eine verteilte dynamische Firewallarchitektur für Multimedia-Dienste.
Kommunikation in Verteilten Systemen 1999: 144-157 |
| 1998 |
| 2 | | Thomas Kubela,
Ralf Ackermann:
Agent-Q - das Diagnose- und Datenqualitätssystem (Ein Praxisbericht).
Workshop Integration heterogener Softwaresysteme 1998: 55-67 |
| 1981 |
| 1 | | G. Neumann,
Ralf Ackermann,
Winfried Grünewald:
Messungen zum Kommunikationsaufwand für Prozesse in einem lokalen Rechnernetz: Erfahrungen aus einer Implementation.
Implementierungssprachen für nichtsequentielle Programmsysteme 1981: 186-208 |