Security Considerations in Current VoIP Protocols. - Steffen Fries (SECRYPT, 2006)

Bootstrapping Timed Efficient Stream Loss-Tolerant Authentication (TESLA). - Steffen Fries; Hannes Tschofenig (RFC, 2006)

Navigating in Webs of Trust: Finding Short Trust Chains in Unstructured Networks without Global Knowledge. - Jens-Uwe Bußer; Steffen Fries; Martin Otto 002; Peter Hartmann (ARES, 2008)

Security Governance for Enterprise VoIP Communication. - Rainer Falk; Steffen Fries (SECURWARE, 2008)

On the Applicability of Various Multimedia Internet KEYing (MIKEY) Modes and Extensions. - Steffen Fries; Dragan Ignjatic (RFC, 2008)

Profiling the Protection of Sensitive Enterprise Multimedia Communication. - Rainer Falk; Steffen Fries (ICIW, 2009)

Requirements and Analysis of Media Security Management Protocols. - Dan Wing; Steffen Fries; Hannes Tschofenig; François Audet (RFC, 2009)

Smart Grid Cyber Security - An Overview of Selected Scenarios and Their Security Implications. - Rainer Falk; Steffen Fries (Prax. Inf.verarb. Kommun., 2011)

Secure Identifiers and Initial Credential Bootstrapping for IoT@Work. - Kai Fischer; Jürgen Gessner; Steffen Fries (IMIS, 2012)

Smart Grid Information Exchange - Securing the Smart Grid from the Ground. - Steffen Fries; Rainer Falk; Ariane Sutor (SmartGridSec, 2012)

Secure Communication Using Electronic Identity Cards for Voice over IP Communication, Home Energy Management, and eMobility. - Rainer Falk; Steffen Fries; Hans-Joachim Hof (CoRR, 2015)

ASIA: An Access Control, Session Invocation and Authorization Architecture for Home Energy Appliances in Smart Energy Grid Environments. - Rainer Falk; Steffen Fries; Hans-Joachim Hof (CoRR, 2015)

Next Steps in Security for Time Synchronization: Experiences from implementing IEEE 1588 v2.1. - Ezzeldin Shereen; Florian Bitard; György Dán; Tolga Sel; Steffen Fries (ISPCS, 2019)

Ensuring Consistency for Asynchronous Group-Key Management in the Industrial IoT. - Alessandro Piccoli; Marc-Oliver Pahl; Steffen Fries; Tolga Sel (CNSM, 2020)

PTP Security Key Management Solutions. - Martin Langer; Steffen Fries; Marius Rohde; Kai Heine; Dieter Sibold; Rainer Bermbach (ISPCS, 2021)

Lightweight Certificate Management Protocol (CMP) Profile. - Hendrik Brockhaus; David von Oheimb; Steffen Fries (RFC, 2023)

BRSKI with Alternative Enrollment (BRSKI-AE). - David von Oheimb; Steffen Fries; Hendrik Brockhaus (RFC, 2025)