Katharina Krombholz

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Social engineering has emerged as a serious threat in virtual communities and is an effective means to attack information systems. The services used by today’s knowledge workers prepare the ground for sophisticated social engineering attacks. The growing trend towards BYOD (bring your own device) policies and the use of online communication and(More)
Social networks such as Facebook, Twitter and Google+ have attracted millions of users in the last years. One of the most widely used social networks, Facebook, recently had an initial public offering (IPO) in May 2012, which was among the biggest in Internet technology. Forprofit and nonprofit organizations primarily use such platforms for target-oriented(More)
The history of computers is full of underestimation: 640 kilobyte, 2-digit years, and 32-bit Internet addresses. IPv6 was invented to overcome the latter as well as to revise other drawbacks and security vulnerabilities of its predecessor IPv4. Initially considered the savior in terms of security because of its mandatory IPsec support, it turned out not to(More)
Databases contain an enormous amount of structured data. While the use of forensic analysis on the file system level for creating (partial) timelines, recovering deleted data and revealing concealed activities is very popular and multiple forensic toolsets exist, the systematic analysis of database management systems has only recently begun. Databases(More)
Social engineering has become an emerging threat in virtual communities and is an effective means to attack information systems. Today's knowledge workers make use of a number of services that leverage sophisticated social engineering attacks. Moreover, there is a trend towards <i>BYOD</i> (bring your own device) policies and the usage of online(More)
QR (Quick Response) codes are two-dimensional barcodes with the ability to encode different types of information. Because of their high information density and robustness, QR codes have gained popularity in various fields of application. Even though they offer a broad range of advantages, QR codes pose significant security risks. Attackers can encode(More)
Cloud computing offers a different, affordable approach for supporting the IT needs of organisations. However, despite the unprecedented benefits cloud migration may bring, there are numerous difficulties involved in moving business critical applications, legacy systems or corporate data into the cloud. It is necessary to consider a broad view over all(More)
We present the first large-scale survey to investigate how users experience the Bitcoin ecosystem in terms of security, privacy and anonymity. We surveyed 990 Bitcoin users to determine Bitcoin management strategies and identified how users deploy security measures to protect their keys and bitcoins. We found that about 46% of our participants use(More)
2D barcodes offer many benefits compared to 1D barcodes, such as high information density and robustness. Before their introduction to the mobile phone ecosystem, they have been widely used in specific applications, such as logistics or ticketing. However, there are multiple competing standards with different benefits and drawbacks. Therefore, reader(More)
Today's capability of fast Internet-wide scanning allows insights into the Internet ecosystem, but the on-going transition to the new Internet Protocol version 6 (IPv6) makes the approach of probing all possible addresses infeasible, even at current speeds of more than a million probes per second. As a consequence, the exploitation of frequent patterns has(More)