Laboratory of e-media

Research activities of Laboratory of e-media belong to the field of informatics with the following specific focuses:

  • security and privacy in computer networks and information systems;
  • advanced informatics (e-business) and advanced computer communications;
  • human factor research and modeling.

The concrete results include protocols (including patents) that are providing security and privacy in environments with limited computational resources, such as smart cards and sensor networks. Further, the results also include methodologies for formal verification of desired security objectives. Further, the results include simulation models that are based on system dynamics (management of large scale organizational structures and critical infrastructures) and technological solutions for trust management in the global networks, and ubiquitous computing environments. These solutions are of a multi-disciplinary nature. Last but not least, the results include implementations of supply chains management in food sector based on RFID technologies.

Publication results of Laboratory of e-media include papers published in high ranking international journals (like those published by Elsevier and the IEEE), as well as monographs published by renowned publishers (like Springer, Francis & Taylor). 

Laboratory of e-Media has an extensive international collaboration network; it participates in national, as well as European projects. Its references also include several examples of transfer of new knowledge to the market. Last but not least, members of the laboratory are involved in important international organizations.

The SALUS consortium (where LEM FRI UL is among core partners) has received ICCA 2016 award.

Where are we? 

You can find us at Faculty for computer and information science, Večna pot 113, 1000 Ljubljana, Slovenia, EU, in the third floor room nr. 50 (R3.50).


External collaborators

  • Damjan Kovač, PhD
  • Balu Deokate
  • as. Jernej Kos
  • as. Iztok Starc, MSc


  • as. Damjan Tratnik
  • Eva Zupančič, PhD

Some developed implementations

 Trust management

Alpha Test Bed enables the evaluation of trust management methods. [More information]

Scalable Sybil-tolerant routing

  • A distributed emulation testbed, which enables evaluation of routing protocols on large topologies.
  • The U-Sphere protocol, enabling scalable routing on large topologies and is tolerant to Sybil attacks.
  • The implementation is available as a set of C++ libraries.


Call for Applications - PhD students positions

Prospective students (can be from Slovenia, EU, or any other state) are invited to apply for PhD degree. (mainly research, and partially teaching positions). Check the list of available research areas.

Selected Bibliography

Scientific papers

TRČEK, Denis, BRODNIK, Andrej. Hard and soft security provisioning for computationally weak pervasive computing systems in e-health. IEEE wireless communications, pp. 22-29, IEEE, 2013, ISSN 1536-1284.
TRČEK, Denis, LIKAR, Borut. Driving information systems security through innovations : first indications. Cybernetics and systems, ISSN 0196-9722, 2014, vol. 45, iss. 1, str. 56-68.
TRČEK, Denis. Computational trust management, QAD, and its applications. Informatica, ISSN 0868-4952, 2014, vol. 25, no. 1, str. 139-154.
TRČEK, Denis. Qualitative assessment dynamics : complementing trust methods for decision making. International journal of information technology & decision making. [Online ed.], 2014, vol. 12, no. 6, str. 1-19.
CUIÑAS, Iñigo, NEWMAN, Robert M., TREBAR, Mira, CATARINUCCI, Luca, ALVAREZ MELCON, Alejandro. RFID-based traceability along the food-production chain. IEEE antennas & propagation magazine, ISSN 1045-9243. [Print ed.], Apr. 2014, vol. 56, no. 2, pp. 196-207.
PARRENO MARCHANTE, Alfredo, ALVAREZ-MELCON, Alejandro, TREBAR, Mira, FILIPPIN, Piero. Advanced traceability system in aquaculture supply chain. /Journal of food engineering/, ISSN 0260-8774. [Print ed.], Feb. 2014, vol. 122, pp. 99-109.
JELENC, David, HERMOSO, Ramón, SABATER-MIR, Jordi, TRČEK, Denis. Decision making matters : a better way to evaluate trust models. Knowledge-based systems, ISSN 0950-7051. [Print ed.], Nov. 2013, vol. 52, str. 147-164.
TREBAR, Mira, LOTRIČ, Metka, FONDA, Irena, PLETERŠEK, Anton, KOVAČIČ, Kosta. RFID data loggers in fish supply chain traceability. /International journal of antennas and propagation (Online)/, ISSN 1687-5877. [Online ed.], 2013, vol. 2013, str. 1-9.
CUIÑAS, Inigo, NEWMAN, Robert M., TREBAR, Mira, CATARINUCCI, Luca. Traceability of goods by radio systems : proposals, techniques, and applications. /International journal of antennas and propagation (Online)/, ISSN 1687-5877. [Online ed.], 2013, vol. 2013, str. 1-2.
TRČEK, Denis. Lightweight protocols and privacy for all-in-silicon objects. Ad hoc networks, ISSN 1570-8705, July 2013, vol. 11, no. 5, str. 1619-1628.
JELENC, David, TRČEK, Denis. Qualitative trust model with a configurable method to aggregate ordinal data. Autonomous agents and multi-agent systems, ISSN 1387-2532, 2013, str. 1-31.
LIKAR, Borut, TRČEK, Denis. A methodology for provision of sustainable information systems security. Cybernetics and systems, ISSN 0196-9722, 2012, vol. 43, no. 1, str. 22-33.
TRČEK, Denis. An integrative architecture for a sensor-supported trust management system. Sensors, ISSN 1424-8220, Aug. 2012, vol. 12, no. 8, str. 1-14.
ŠUBELJ, Lovro, JELENC, David, ZUPANČIČ, Eva, LAVBIČ, Dejan, TRČEK, Denis, KRISPER, Marjan, BAJEC, Marko. Merging data sources based on semantics, contexts and trust. The IPSI BgD transactions on internet research, ISSN 1820-4503. [Print ed.], 2011, vol. 7, no. 1, str. 18-30.
TRČEK, Denis. Security metrics foundations for computer security. The Computer journal, ISSN 0010-4620, 2010, vol. 53, no. 5, str. 1106-1112.
TRČEK, Denis, ABIE, Habtamu, SKOMEDAL, Åsmund, STARC, Iztok. Advanced framework for digital forensic technologies and procedures. Journal of forensic sciences, ISSN 0022-1198, Nov. 2010, vol. 55, no. 6, str. 1471-1480. 

TRČEK, Denis, KOVAČ, Damjan. Formal apparatus for measurement of lightweight protocols. Comput. stand. interfaces, Feb. 2009, vol. 31, no. 2, pp. 305-308.

TRČEK, Denis. A formal apparatus for modeling trust in computing environments. Math. comput. model., 2008, pp. 1-8, ilupp., doi: 10.1016/j.mcm.2008.05.005.

TRČEK, Denis, TROBEC, Roman, PAVEŠIĆ, Nikola, TASIČ, Jurij F. Information systems security and human behavior. Behav. inf. technol., 2007, vol. 26, št. 2, pp. 113-118.

TRČEK, Denis. Security models : Refocusing on the human factor. IEEE Computer (Long Beach Calif.), 2006, vol. 39, no. 11, pp. 103-104.

KOVAČ, Damjan, TRČEK, Denis. Qualitative trust modeling in SOA. J. systems archit., 2009, vol. 55, no. 4, pp. 255-263,

TRČEK, Denis. Using systems dynamics for human resources management in information systems security. Kybernetes, 2006, vol. 35, no. 7-8, pp. 1014-1023.

TRČEK, Denis. Using system dynamics for managing risks in information systems. WSEAS transactions on information science and applications, Feb. 2008, vol. 5, no. 2, pp. 175-180.

TRČEK, Denis. MAC based lightweight protocols for strong authentication and key exchange. J. inf. sci. eng., 2005, vol. 21, pp. 1-13.

TRČEK, Denis. Towards trust management standardization. Comput. stand. interfaces, 2004, vol. 26, pp. 543-548.

TRČEK, Denis, NOVAK, Roman, KANDUS, Gorazd, SUŠELJ, Marjan. Slovene smart card and IP based health-care information system infrastructure. International journal of medical informatics, 2001, vol. 61, pp. 33-43.

TRČEK, Denis. Security policy conceptual modeling and formalization for networked information systems. Comput. commun., 2000, vol. 23, pp. 1716-1723.

TRČEK, Denis. Minimizing the risk of electronic document forgery. Comput. stand. interfaces, 1998, vol. 19, pp. 161-167.

TRČEK, Denis. Organization of certification authorities in a global network. Comput. secur. j., 1994, vol. 10, pp. 71-81.

TRČEK, Denis. An integral framework for information systems security management. Comput. secur., 2003, vol. 22, pp. 337-359.

TRČEK, Denis, KANDUS, Gorazd. Trust management in E-business systems - from taxonomy to trust engine architecture. WSEAS Trans. Syst., 2003, vol. 2, pp. 151-155.

TRČEK, Denis, KANDUS, Gorazd. Information systems security policy - human factor modeling and simulation. WSEAS Trans. Comput., 2003, vol. 2, pp. 339-342.

TRČEK, Denis, JERMAN-BLAŽIČ, Borka. Certificates handling and their support within X.500 system. Microprocess. microprogram., 1993, vol. 39, pp. 183-186.

JERMAN-BLAŽIČ, Borka, TRČEK, Denis, KLOBUČAR, Tomaž, BRAČUN, Franc. A tool for support of key distribution and validity certificate check in global Directory service. Comput. netw. ISDN systems, 1996, vol. 28, pp. 709-717.

TRČEK, Denis, JERMAN-BLAŽIČ, Borka. Formal language for security services base modeling and analysis. Comput. commun., 1995, vol. 18, pp. 921-928.

TRČEK, Denis, JERMAN-BLAŽIČ, Borka. Certification authorities in a global network - procedures and guidelines for a public key infrastructure. Aust. comput. j., 1997, 29, pp. 41-47.

TRČEK, Denis, JERMAN-BLAŽIČ, Borka, PAVEŠIĆ, Nikola. Security policy space definition and structuring. Comput. stand. interfaces, 1996, vol. 18, pp. 191-195.

Scientific Monographs

TRČEK, Denis. Managing information systems security and privacy. Berlin; Heidelberg; New York: Springer, 2006. XIII, 235 pp.,ISBN 3-540-28103-7. ISBN 978-3-540-28103-0.


Chapters in Scientific Monographs

TRČEK, Denis, Computationally Supported Quantitative Risk Management for Information Systems, In: Performance Models and Risk Management in Communications Systems, Eds. N. Gülpınar, P. Harrison, R. Ber, Springer, Heidelberg / New York, 2010.

TRČEK, Denis, Jappinen Pekka, RFID Security. Eds: ZHANG, Yan, ZHENG, Jun, MA, Miao. RFID and Sensor Networks: Architectures, Protocols, Security and Integrations; Auerbach / Francis & Taylor, London, 2009.

TRČEK, Denis. Security and privacy in RFID based wireless networks. Eds: ZHANG, Yan, ZHENG, Jun, MA, Miao. Handbook of research on wireless security. Hershey; New York; London: Information Science Reference: IGI Global, 2008, vol. 2, pp. 723-731.

TRČEK, Denis. E-business systems security for intelligent enterprise. Eds: GUPTA, Jatinder N. D., SHARMA, Sushil K.. Intelligent enterprises of the 21st century. Hershey [etc.]: Idea Group Pub., 2004, pp. 302-320.


Current Projects

Closed Projects

Trcek D.: Managing Information Systems Security and Privacy. Springer Verlag, Heidelberg, 2006.


Trcek D.: Computationally Supported Quantitative Risk Management for Information Systems, In: Performance Models and Risk Management in Communications Systems, Eds. N. Gülpınar, P. Harrison, R. Ber, Springer, Heidelberg / New York, 2010.

Trcek D. and Jappinen P.: RFID Security, RFID and Sensor Networks - Architectures,
Protocols, Security and Integrations, Zhang Y. et al. (Eds.), CRC Press, Taylor & Francis Group, London / New York, 2009, pp. 147-168.

Trcek D.: E-business systems security for intelligent enterprise. GUPTA J. N. D., SHARMA S. K. (eds.), Intelligent enterprises of the century, Idea Group Pub., Hershey, 2004, pp. 302-320.

Stiller B., Trcek D.: Pricing and QoS. Smirnov M. I. (editor), Quality of future Internet services, Lecture notes in computer science, vol. 2856, Springer-Verlag, Heidelberg, 2003, pp. 263-291.

D. Trcek, SECURITY AND PRIVACY IN RFID BASED WIRELESS NETWORKS, Handbook of Research on Wireless Security (eds. Zhang Y., Zheng J., Ma M.), IGI Global, 2008, ISBN: 159904899X