Jonas Hielscher

dblp:296/3944 · DBLP profile ↗
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13ranked-venue papers
7as first author
13since 2021 · last 2025
0000-0002-5159-3868ORCID · verified

Domains — the database's venue-derived domains; a paper can count in several

Security and privacy · 12 · 7 first-author · 12 since 2021Human-computer interaction and ubiquitous computing · 2 · 1 first-author · 2 since 2021
YearPublicationVenuePosition
2025 Quantifying Security Training in Organizations Through the Analysis of U.S. SEC 10-K Filings
abstract
The Security Awareness and Training (SAT) market exceeds multiple billion dollars annually, yet reliable data on organizational adoption remains scarce. Conflicting, survey-based figures from cybersecurity vendors leave researchers and decision-makers reliant on questionable insights. A new U.S. Securities and Exchange Commission (SEC) regulation, effective since late 2023, requires companies to disclose cybersecurity strategies in annual Form 10-K filings, offering a more consistent data source. In this study, we crawl and analyze filings from 5,286 U.S. companies across diverse sectors and sizes, using keyword searches and thematic analysis, which offers a lower-bound estimate of prevalent topics. We find that 78% of companies report implementing SAT and 27% conduct phishing simulations, with adoption varying significantly by sector and size. Larger companies report more extensive SAT efforts, often aligned with standards like NIST CSF. While multi-factor authentication (11%) is the most common employee-facing security control, many filings frame employees as a risk factor. Our findings help organizations critically assess SAT strategies and vendor claims, offer actionable insights for policymakers, and equip scholars with a coded dataset and crawling tools for ongoing longitudinal analysis.
Jonas Hielscher, Maximilian Golla
CCS1
2025 "Where Are We On Cyber?" - A Qualitative Study On Boards' Cybersecurity Risk Decision Making
Jens Christian Opdenbusch, Jonas Hielscher, M. Angela Sasse
NDSS2
2025 Digital Security Perceptions and Practices Around the World: A WEIRD versus Non-WEIRD Comparison
Franziska Herbert, Collins W. Munyendo, Jonas Hielscher, Steffen Becker 0003, Yixin Zou
USENIX Security Symposium3
2024 Selling Satisfaction: A Qualitative Analysis of Cybersecurity Awareness Vendors' Promises
abstract
Security awareness and training (SAT) vendors operate in a growing multi-billion dollar market. They publish various marketing promises on their websites to their customers -- organizations of all sizes. This paper investigates how these promises align with customers' needs, how they relate to human-centered security challenges highlighted in prior research, and what narrative is presented regarding the role of employees (as SAT recipients). We also investigate the level of transparency in vendor promises, as to whether it constitutes an information asymmetry. We gathered search terms from n=30 awareness professionals to perform an automated Google search and scraping of SAT vendors' websites. We then performed a thematic analysis of 2,476 statements on 156 websites from 59 vendors. We found that the messaging from SAT vendors precisely targets customers' need for easy-to-implement and compliance-fulfilling SAT products; how SAT products are offered also means that some of the impacts of SAT go unmentioned and are transferred to the customer, such as user support. In this vendor-customer relationship, employees are portrayed as a source of weaknesses, needing an indefinite amount of training to be incorporated into the organization's protection. We conclude with suggestions for SAT vendors and regulators, notably toward an SAT ecosystem that directly links SAT solutions to usable security technologies within the organization environment.
Jonas Hielscher, Markus Schöps, Jens Christian Opdenbusch, Felix Reichmann, Marco Gutfleisch, Karola Marky, Simon Edward Parkin
CCS1
2024 Digital Security - A Question of Perspective A Large-Scale Telephone Survey with Four At-Risk User Groups
abstract
This paper investigates the digital security experiences of four at-risk user groups in Germany, including older adults (70+), teenagers (14-17), people with migration backgrounds, and people with low formal education. Using computer-assisted telephone interviews, we sampled 250 participants per group, representative of region, gender, and partly age distributions. We examine their device usage, concerns, prior negative incidents, perceptions of potential attackers, and information sources. Our study provides the first quantitative and nationally representative insights into the digital security experiences of these four at-risk groups in Germany. Our findings show that participants with migration backgrounds used the most devices, sought more security information, and reported more experiences with cybercrime incidents than other groups. Older adults used the fewest devices and were least affected by cybercrimes. All groups relied on friends and family and online news as their primary sources of security information, with little concern about their social circles being potential attackers. We highlight the nuanced differences between the four at-risk groups and compare them to the broader German population when possible. We conclude by presenting recommendations for education, policy, and future research aimed at addressing the digital security needs of these at-risk user groups.
Franziska Herbert, Steffen Becker 0003, Annalina Buckmann, Marvin Kowalewski, Jonas Hielscher, Yasemin Acar, Markus Dürmuth, Yixin Zou, M. Angela Sasse
SP5
2024 "What Keeps People Secure is That They Met The Security Team": Deconstructing Drivers And Goals of Organizational Security Awareness
Jonas Hielscher, Simon Edward Parkin
USENIX Security Symposium1
2023 A World Full of Privacy and Security (Mis)conceptions? Findings of a Representative Survey in 12 Countries
abstract
Misconceptions about digital security and privacy topics in the general public frequently lead to insecure behavior. However, little is known about the prevalence and extent of such misconceptions in a global context. In this work, we present the results of the first large-scale survey of a global population on misconceptions: We conducted an online survey with n = 12, 351 participants in 12 countries on four continents. By investigating influencing factors of misconceptions around eight common security and privacy topics (including E2EE, Wi-Fi, VPN, and malware), we find the country of residence to be the strongest estimate for holding misconceptions. We also identify differences between non-Western and Western countries, demonstrating the need for region-specific research on user security knowledge, perceptions, and behavior. While we did not observe many outright misconceptions, we did identify a lack of understanding and uncertainty about several fundamental privacy and security topics.
Franziska Herbert, Steffen Becker 0003, Leonie Schaewitz, Jonas Hielscher, Marvin Kowalewski, M. Angela Sasse, Yasemin Acar, Markus Dürmuth
CHI4
2023 Lacking the Tools and Support to Fix Friction: Results from an Interview Study with Security Managers
Jonas Hielscher, Markus Schöps, Uta Menges, Marco Gutfleisch, Mirko Helbling, M. Angela Sasse
SOUPS1
2023 "To Do This Properly, You Need More Resources": The Hidden Costs of Introducing Simulated Phishing Campaigns
Lina Brunken, Annalina Buckmann, Jonas Hielscher, M. Angela Sasse
USENIX Security Symposium3
2023 "Employees Who Don't Accept the Time Security Takes Are Not Aware Enough": The CISO View of Human-Centred Security
Jonas Hielscher, Uta Menges, Simon Edward Parkin, Annette Kluge, M. Angela Sasse
USENIX Security Symposium1
2021 A Systematic Analysis of Covert Channels in the Network Time Protocol
abstract
Covert channels in network protocols are a technique aiming to hide the very existence of secret communication in computer networks. In this work we present a systematic in-depth analysis of covert channels by modification for the Network Time Protocol (NTP). Our analysis results in the identification of 49 covert channels, by applying a covert channel pattern-based taxonomy. The summary and comparison based on nine selected key attributes show that NTP is a plausible carrier for covert channels. The analysis results are evaluated in regards to common behavior of NTP implementations in six major operating systems. Two channels are selected and implemented to be evaluated in network test-beds. By hiding encrypted high entropy data in a high entropy field of NTP we show in our first assessment that practically undetectable channels can be implemented in NTP, motivating the required further research. In our evaluation, we analyze 40,000 NTP server responses from public NTP server providers. We discuss the general approach of the research community that detection of covert channels is the more promising countermeasure, compared to active suppression of covert channels. Therefore, normalization approaches and a secure network environment are introduced.
Jonas Hielscher, Kevin Lamshöft, Christian Krätzer, Jana Dittmann
ARES1
2021 Meta and Media Data Stream Forensics in the Encrypted Domain of Video Conferences
abstract
Our paper presents a systematic approach to investigate whether and how events can be identified and extracted during the use of video conferencing software. Our approach is based on the encrypted meta and multimedia data exchanged during video conference sessions. It relies on the network data stream which contains data interpretable without decryption (plain data) and encrypted data (encrypted content) some of which is decrypted using our approach (decrypted content). This systematic approach uses a forensic process model and the fission of network data streams before applying methods on the specific individual data types. Our approach is applied exemplary to the Zoom Videoconferencing Service with Client Version 5.4.57862.0110 [4], the mobile Android App Client Version 5.5.2 (1328) [4], the webbased client and the servers (accessed between Jan 21st and Feb 4th). The investigation includes over 50 different configurations. For the heuristic speaker identification, two series of nine sets for eight different speakers are collected. The results show that various user data can be derived from characteristics of encrypted media streams, even if end-to-end encryption is used. The findings suggest user privacy risks. Our approach offers the identification of various events, which enable activity tracking (e.g. camera on/off, increased activity in front of camera) by evaluating heuristic features of the network streams. Further research into user identification within the encrypted audio stream based on pattern recognition using heuristic features of the corresponding network data stream is conducted and suggests the possibility to identify users within a specific set.
Robert Altschaffel, Jonas Hielscher, Stefan Kiltz, Jana Dittmann
IH&MMSec2
2021 "Taking out the Trash": Why Security Behavior Change requires Intentional Forgetting
abstract
Security awareness is big business – virtually every organization in the Western world provides some form of awareness or training, mostly bought from external vendors. However, studies and industry reports show that these programs have little to no effect in terms of changing the security behavior of employees. We explain the conditions that enable behavior change, and identify one significant blocker in the implementation phase: not disabling existing (insecure) routines – failure to take out the trash – prevents embedding of new (secure) routines. Organizational Psychology offers the paradigm Intentional Forgetting (IF) and associated tools for replacing old (insecure) behaviors with new (secure) ones by identifying and eliminating different cues (sensoric, routine-based, time and space based as well as situational strength cues) that trigger old behavior. We introduce the underlying theory, examples of successful application in safety contexts, and show how its application leads to effective behavior change by reducing the information that needs to be transmitted to employees, and suppressing obsolete routines.
Jonas Hielscher, Annette Kluge, Uta Menges, M. Angela Sasse
NSPW1