Cryptography, Application Notes in C,.NET and Java

Scope of the material This material is mainly intended for students following lectures on Cryptography and Systems Security at Politehnica University of Timisoara (UPT), Romania. The main intention of these notes is to show that the theoretical objects discussed during lectures, besides their practical value which reasonably follows from relevance of information security today, are also present in a large variety of programming frameworks. It was a main intention not to bind the content of the notes with a particular programming framework as cryptography is platform independent. For this reason, we make use of C programming under Linux (Section 1),.NET (Sections 2-5) and Java (Sections 6 and 7). These notes are intended for engineers and are not focused on the design of cryptographic primitives which is a more demanding task, the material requires n