Vaudenay's cryptanalysis to Chor-Rivest cryptosystem is not applicable if the parameters p and h of the finite field are both prime integers. This case is analyzed below and the parameters for which such cryptosys-tem is cryptographically interesting are listed. Regrettably the resulting cryptosystems are not very efficient in practice.
Engineering students learn Mathematics solving real-life problems with the help of mathematical tools and the already acquired competencies and knowledge. Moreover, the use of realistic mathematics education method allows the integration of daily, real and realistic experiences to master Mathematics. The proposed teaching and learning method, is the way to… (More)