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System Security

Welcome
Welcome
About Us
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  1. Faculty of Computer Science, Electrical Engineering and Mathematics
  2. Institute of Computer Science
  3. System Security

Welcome

on the website of the “System Security” group.

About Us

The group at RuhrSec ’25 in Bochum.
from left to right Nico Heitmann, Sven Hebrok, Jost Rossel, Maximilian Radoy, Niklas Niere, Felix Lange, and Juraj Somorovsky

Our research and teaching focuses on system security, network security, applied cryptography, and censorship. Our expertise has contributed to the discovery of critical security vulnerabilities such as DROWN, ROBOT, Efail, ALPACA, and Raccoon. We systematically analyse such vulnerabilities and develop test tools to identify and fix them. One example is a tool for flexibly analysing TLS libraries: TLS-Attacker.

the team

News

04.04.2025

[blog] China Ex­ten­ded its SNI Cen­sor­ship to QUIC

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20.02.2025

Cen­sor­ship Ana­lyses of the Ir­a­ni­an HT­TP and DNS Cen­sor at Vir­tu­al FOCI 2025

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18.02.2025

[blog] Auto­mated Bib­li­o­graphy Man­age­ment in Over­leaf with Zotero and a Cus­tom Proxy

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19.11.2024

[blog] Cen­sors Ig­nore Un­en­cryp­ted HT­TP/2 Traffic

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15.07.2024

Cen­sor­ship Cir­cum­ven­tion with HT­TP Re­quest Smug­gling in Bris­tol

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23.10.2023

3D Print­ing Se­cur­ity in Hong Kong

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10.10.2023

Three Theses Awar­ded “CAST Förder­preis IT-Sich­er­heit 2023”

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27.06.2023

[blog] Cir­cum­vent­ing the GFW with TLS Re­cord Frag­ment­a­tion

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19.04.2023

[blog] We Really Need to Talk About Ses­sion Tick­ets

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06.04.2023

Früh­lings-Uni

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06.03.2023

[blog] Bach­el­or's Thes­is: Web Key Dir­ect­ory and Oth­er Key Ex­change Meth­ods for Open­P­GP

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02.12.2022

[blog] Us­age Stat­ist­ics of 3D Print­ing File Formats

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11.10.2022

Two of Our Stu­dents are Awar­ded “CAST Förder­preis IT-Sich­er­heit 2022”

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11.08.2022

Our study on e-mail sig­na­ture spoof­ing at­tacks presen­ted at SOUPS

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11.08.2022

TLS-An­vil presen­ted at USENIX Se­cur­ity

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19.04.2022

Two open PhD po­s­i­tions for our NER­D2 pro­jects

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14.10.2021

Herb­s­tuni

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01.09.2021

ES­OR­ICS Tu­tori­al on TLS 1.3

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10.08.2021

TLS-At­tack­er de­velopers

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10.08.2021

Two pa­pers presen­ted at USENIX Se­cur­ity this week

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09.06.2021

ALPACA At­tack

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25.05.2021

IT Se­cur­ity "Stam­mt­isch"

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04.03.2021

Open po­s­i­tion: CTF de­veloper

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26.02.2021

IT-Sich­er­heit an der Uni Pader­born

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24.09.2020

Rac­coon At­tack

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24.09.2020

Our pa­per on Se­cur­ing E-Mail en­cryp­tion ac­cep­ted at ACM CCS 2020

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25.05.2020

Open po­s­i­tions in the area of IT se­cur­ity

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25.05.2020

Our pa­per on Ana­lys­is of DTLS Im­ple­ment­a­tions Us­ing Pro­tocol State Fuzz­ing got ac­cep­ted to USENIX Se­cur­ity 2020

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15.03.2020

3 Ques­tions for... Prof. Dr. Juraj So­morovsky

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More news

Over­view

Close-up of a chip.

Re­search

Our research focuses on system security, network security, file format security, applied cryptography, and analyses of internet censorship. More information about our research.

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Pub­lic­a­tions

All scientific publications from our group.

all publications
Lecture in building L of Paderborn University.

Teach­ing

Our group offers IT Security, Web Security, and Real World Crypto Engineering lectures. You can deepen your know-how in these areas with a seminar thesis, project group, or Bachelor/Master thesis. You can find news about our courses, theses, and other teaching-related topics here.

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Con­tact Us

Gebäude O

Prof. Dr.-Ing. Juraj Somorovsky

System Security

Room F2.315
Paderborn University
Fürstenallee 11
33102 Paderborn

+49 5251 60-6690 Send E-Mail Directions

How to find the room F2.315

Marker
Prof. Dr.-Ing. Juraj Somorovsky
Fürstenallee 11
33102 Paderborn
Room F2.315
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System Security

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System Security

Warburger Str. 100
33098 Paderborn
Germany

Universität Paderborn

Warburger Str. 100
33098 Paderborn
Germany

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+49 5251 60-0
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