Benjamin Kolbe studierte den Diplomstudiengang Informatik an der Fachhochschule Flensburg. Er bekam 2009 den Titel Diplom-Informatiker verliehen. Schon während des Studiums war er bei der Firma ITD Informationstechnologie GmbH & Co. KG als Werkvertragsnehmer tätig. Bei dieser Tätigkeit arbeitete er an verschiedenen Produkten im Bereich der Entwicklung von VoIP-Messsystemen. Außerdem war er für ...

g∈G agg −1 is an antiautomorphism of KG of order 2. An element v of V (KG) satisfying v = v is called unitary. We denote by V∗(KG) the subgroup of V (KG) formed by the unitary elements of KG. Let char(K) be the characteristic of the field K. In [2], A.Bovdi and A. Szákacs construct a basis for V∗(KG) where char(K) > 2. Also A. Bovdi and L. Erdei [1] determine the structure of V∗(F2G) for all gr...

Abstract. Let K be a field of characteristic p and G a nonabelian metacyclic finite p-group. We give an explicit list of all metacyclic p-groups G, such that the group algebra KG over a field of characteristic p has a filtered multiplicative K-basis. We also present an example of a non-metacyclic 2-group G, such that the group algebra KG over any field of characteristic 2 has a filtered multipl...

The Grothendieck constant KG is the smallest constant such that for every n ∈ N and every matrix A = (ai j) the following holds,

Dualizing marked Petri nets results in tokens for transitions (t-tokens). A marked transition can strictly not be enabled, even if there are sufficient ”enabling” tokens (p-tokens) on its input places. On the other hand, t-tokens can be moved by the firing of places. This permits flows of t-tokens which describe sequences of non-events. Their benefit to simulation is the possibility to model (a...

QuickPay is a micro payment scheme with prepayment 1, 6. The customer must register with the broker to obtain an electronic carnet with value tokens before a sale may take place. It is possible to acquire additional value tokens, or to refresh the value tokens at any time. A merchant must also register with the broker to obtain an electronic till with authentication tokens. This will enable the...

.......................................................................................................3 Background ..................................................................................................4 Soft Tokens and Their Vulnerabilities ..........................................................5 Hardware Tokens and Smart Cards ......................................................