Bei vielen Anwendungen ist die Integrität und Authentizität übertragener Nachrichten von Interesse. So sind zum Beispiel im Online-Banking sind die relevanten Informationen i) welches Empfänger-Konto eine Gutschrift erhält, ii) welcher Betrag dem Empfänger gutgeschrieben werden soll, iii)) welches Sender-Konto eine ...

Live-videostream networks based on multimedia switches are the most recent products used in television production and distribution facilities to transport the live signal from sources like cameras or microphones to dedicated sinks like video monitors, loudspeakers and transmission lines. To switch signals from a single ...

A network early warning system consists of several distributed sensors to detect malicious network activity. The effectiveness of such early warning systems critically depends on the sensor deployment strategy used. We therefore analysed attack patterns of malicious software collected at sensors worldwide to determine ...

We present experimental results using lattice reduction algorithms. We choose the BKZ algorithm, that is the algorithm considered the strongest one in this area in practice. It is an important task to analyze the practical behaviour of lattice reduction algorithms, as the theoretical predictions are far from being ...

Blind image forensics aims to assess image authenticity. One of the most popular families of methods from this category is the detection of copy-move forgeries. In the past years, more than 15 different algorithms have been proposed for copy-move forgery detection. So far, the efficacy of these approaches has barely been ...

OpenID is a user-centric and decentralized Single Sign-On system. It enables users to sign into Relying Partiesby providing an authentication assertion from an OpenID Provider. It is supported by many leading internet companies and there are over a billion accounts capable of using OpenID. We present a security analysis ...

Digital transaction watermarking today is a widely accepted mechanism in multimedia security. One major threat on transaction watermarking are collusion attacks. Here multiple individualized copies of the work are mixed to produce a counterfeited or undetectable watermark. One common countermeasure is the usage of so-called ...

We introduce a new representation for monitored behavior of malicious software called Malware Instruction Set (MIST). The representation is optimized for effective and efficient analysis of behavior using data mining and machine learning techniques. It can be obtained automatically during analysis of malware with a ...

In this paper we present a scalable, parallel computing system consisting of specialized processors primarily designed for the implementation of cryptanalytic algorithms. Even though the system was developed in regard to solve cryptanalytic problems, it is suitable for many other tasks which can benefit from the enormous ...

Minix 3 is a real micro kernel operation system with a lot of remarkable security features. Two of the main points are size and isolation. The Minix 3 kernel is less than one thousand times the size of Linux. All drivers and the IP stack live in user land. We show a port of the netfilter framework, which leads to a system ...