I'm an independent security researcher and forensic analyst, working with many different technologies and their security implications. Besides that, I also like to combine technologies to create art and music.

I am able to provide secure code audits, penetration tests (networks, websites), digital forensics, reverse engineering devices, hard- and software. My research topics include; networks/digital communications, software, electronics design, digital forensics, digital watermarking, steganography, RFID, smart cards and many more.

Get in touch with me:

  • * Licensed ham operator (OE3SHA)
"Art without engineering is dreaming;
 engineering without art is calculating."
     - Steven K. Roberts, Nomadic Research Labs
News article
Niederösterreichische Nachrichten, NÖN, St. Pölten

News article in the Austrian newspaper NÖN - "University of applied sciences St. Pölten - alumnus of the week" column.

Die Graphische (Secondary college for graphics and arts), Vienna

Invited as a guest speaker to talk about surveillance technology and provide expertise: "Dear prism, shine us a little light.", as students were conducting a critical and artistic view regarding recent uncoverings in various projects.

05/2010 - 09/2013
Senior Security Consultant
SEC Consult Unternehmensberatung GmbH

Vast amount of different international projects regarding: software, hardware, device security and preparation of secure coding training courses, as well their project management in many different branches. All projects under NDA. For inquires please contact me and I may define the work done in requested areas, as far as the NDA permits.

Art Project
Tomorrow Festival / X R G Y / Progressive Factory

X R G Y is an experimental music project that evolved from different activities in the progressive FACTORY over the last years. Visualizing and abstracting this, generating therefore a complete audio-visual experience.
Progressive Factory: X R G Y, Vimeo: X R G Y Teaser, Tomorrow Festival

Art Project
Klangturm St. Pölten / Progressive Factory

Technical consultancy for arts project "Glockenspiel". Interactive installation of sound samples from different regions in lower Austria, utilizing ultrasonic detectors.
Progressive Factory: Project page

Lecture / Training
University of Applied Sciences St. Pölten

Penetration Testing - behind the scenes. Three day course on current binary exploitation techniques, reverse engineering and exploit development.
FH St Pölten: News article

Computer Measurement Group - Austria & Eastern Europ (CMG-AE) - Departement. IT and Energy

Presenting research paper regarding Smart Grid security: "Smart Meter - Smart genug für Hacker?"
CMG-AE: news article

Art Project
Pratersauna / Progressive Factory

Concept, design and programming. Interactive installation ``Who Will Conquer The World'', demonstrating the use of artificial intelligence besides a critical view of human aims.
The gap: news article, Pratersauna: event page
This project was also presented at Creative Places St. Pölten: FH St. Pölten Institute of creative media and technologies: News article

AthCon 2012

Presenting research paper regarding Smart Meter security: "Smart Meter PLC - Communication Security worth 0.37 EUR"

2003 - 2008
University degree
University of Applied Sciences St. Pölten, Austria

Degree in Telecommunications Engineering. Thesis: "Evaluation of steganography in VoIP".
Pass with distinction.

1997 - 2002
College diploma
Federal Technical Secondary College of Engineering Mödling

College diploma in engineering and general qualification for university entrance (A levels).
Pass with distinction.

01/2015 - current
PhD Student
iSecLab - University of Technology Vienna

PhD student researching hardware security to extract sensitive information (algorithms, cryptographic key material, program code) directly from the silicon wafer in integrated circuit chips.

09/2013 - current
Independent Security Consultant
Stefan Riegler IT Consulting

Manage and conduct penetration tests, security audits, R&D, project management, prepare and hold security trainings.

05/2010 - 09/2013
Senior Security Consultant
SEC Consult Unternehmensberatung GmbH, Vienna

Manage and conduct penetration tests, security audits, R&D, project management, prepare and hold security trainings.

09/2009 - 05/2010
Security Analyst
Secure Business Austria / SBA Research, Vienna

Manage and conduct penetration tests, security audits, research, prepare and hold security trainings.

09/2008 - 05/2009
Research Assistant, Lecturer
Letterkenny Institute of Technology, Ireland

Granted research project of methods for digital watermarking. Project title: "Development of an Enhanced Watermarking Method for Digital Images". Preparation and lecture of bachelors seminar "Data Communications II" in "Computer Engineering"

02/2003 - 06/2008
Chief Technology Officer
Campusradio 94.4 - Educational radio station at the university St. Pölten

Management, installation and maintenance of the entire sound studio equipment, as well the complete network, server and security infrastructure in the radio station. Development of new features for the radio (software and hardware). Setup, supervision and coordination of field broadcast events.

04/2007 - 11/2007
Research Assistant
University of Applied Sciences St. Pölten

Project StegIT. Design and evaluation of steganographic counter algorithms in VoIP and GSM. - Project founded by KIRAS (Security Research Funding Austria)

06/2004 - 02/2007
System Administrator
University of Applied Sciences St. Pölten

Installation and maintenance of the multimedia laboratory. Preparation, securing and integrating Apple computer systems for regular education (applications, LDAP, etc.). Furthermore assistant to the Network Service Center.

Contact info