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—Cryptanalysis of ciphers usually involves massive computations. The security parameters of cryptographic algorithms are commonly chosen so that attacks are infeasible with available computing resources. Thus, in the absence of mathematical breakthroughs to a cryptanalytical problem, a promising way for tackling the computations involved is to build(More)
Real-time three-dimensional ultrasound has been demonstrated as a viable tool for guiding surgical procedures. This visualization technique enables a range of new minimally invasive techniques in cardiac surgery. Ultrasound permits visualization through the opaque blood pool in the heart, and the advent of real-time 3DUS overcomes difficulties with 3D(More)
Hiermit versichere ich, dass ich meine Diplomarbeit selbst verfasst und keine anderen als die angegebenen Quellen und Hilfsmittel benutzt sowie Zitate als solche kenntlich gemacht habe. I hereby declare that the work presented in this thesis is my own work and that to the best of my knowledge it is original except where indicated by reference to other(More)
The Hitag2 stream cipher is used in many real world applications, such as car immobilizers and door opening systems, as well as for the access control of buildings. The short length of the 48-bit secret key employed makes the cipher vulnerable to a brute-force attack, i.e., exhaustive key search. In this paper we develop the first hardware architecture for(More)
Many real-world car door systems and garage openers are based on the KeeLoq cipher. Recently, the block cipher has been extensively studied. Several attacks have been published, including a complete break of a KeeLoq access control system. It is possible to instantly override the security of all KeeLoq code-hopping schemes in which the secret key of a(More)
Reactive oxygen species (ROS) are highly considered in the ethiopathogenesis of different pathological conditions because they may cause significant damage to cells and tissues. In this paper, we focused on potential antioxidant properties of two medical plants such as the Agrimonia eupatoria L. and Cynara cardunculus L. Both plants have previously been(More)