Thomas Kunkelmann

Learn More
Mobile agents are no longer a theoretical issue since different architectures for their realization have been proposed. With the increasing market of electronic commerce it becomes an interesting aspect to use autonomous mobile agents for electronic business transactions. Being involved in money transactions, supplementary security features for mobile agent(More)
Mobile agents offer a new possibility for the development of applications in distributed systems and are no longer a theoretical issue since different architectures for their implementations have been proposed. With the increasing market of electronic commerce it becomes an interesting aspect to use autonomous mobile agents for electronic business(More)
Many of today's multimedia applications require con dential video transmission over the Internet. Appropriate encryption methods require a high computational complexity and are likely to become a performance bottleneck within software-only applications. To reduce the computational encryption e ort, partial video encryption methods have been proposed in the(More)
Security has become one of the most significant problems for spreading new information technology. Beside cryptographic solutions digital watermarking methods offer several protection possibilities. H204M — Watermarking for Media is a joined project at GMD-IPSI (German National Research Center for Information Technology) and the German broadcast(More)
In multimedia conferencing systems the need for confidentiality gains in importance. This goal can be achieved by encry:,ptiotr. III real-time video processing systems there is a special need jar partial data encryption. Existing methods and their weaknesses are investigated. In this paper we present a new approach for partial encryption of’ video data,(More)
The paradigm of mobile agents offers a powerful and flexible opportunity to develop distributed applications on a high-level of abstraction. One of the most interesting tasks for mobile agents is an active search for relevant information in non-local domains on behalf of their users. A mobile agent will be sent out on behalf of an user to various host(More)
|In this paper we present an approach to design a controller that enables a simulated car to drive autonomously around a race track. The input to the controller is the current speed of the car and several sensor signals indicating the properties of the race track, and as its output the controller is supposed to determine the car's change of direction and(More)