aboutcryptool.tex

a very popular packet of cryptography tools,it encloses the most common used algorithm and protocols

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\section*{Overview about the Content of the CrypTool Script}  
\addcontentsline{toc}{section}{Overview}

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{
\noindent In this CrypTool\index{CrypTool} script you will find predominantly
mathematically oriented information on using cryptographic procedures.
The main chapters have been written by various
{\bf authors} (see appendix \ref{s:appendix-authors})
%\hyperlink{appendix-authors}{authors}
and are therefore independent from one another. At the end of most chapters
you will find literature and web links.

The \hyperlink{Kapitel_1}{first chapter} explains the principles of symmetric
and asymmetric {\bf encryption} and describes shortly the current decryption
records of modern symmetric algorithms.

Because of didactical reasons the \hyperlink{Kapitel_PaperandPencil}
{second chapter} gives an exhaustive overview
about {\bf paper and pencil encryption methods}.

Big parts of this script are dedicated to the fascinating topic of 
{\bf prime numbers} (chap. \ref{Label_Kapitel_2}).
%\hyperlink{Kapitel_2}{{\bf prime numbers}}. 
Using numerous examples,
{\bf modular arithmetic} and 
{\bf elementary number theory} (chap. \ref{Chapter_ElementaryNT})
are introduced and applied in an exemplary manner for the {\bf RSA procedure}.

By reading chapter \ref{Chapter_ModernCryptography}
you'll gain an insight into the mathematical ideas and concepts behind 
{\bf modern cryptography}.

A \hyperlink{Chapter_Hashes-and-Digital-Signatures}{further chapter} gives
an overview about the status of attacks against modern {\bf hash algorithms}
and is then shortly devoted to {\bf digital signatures}, 
which are an essential component of e-business applications. 
The \hyperlink{ellcurve}{last chapter} describes {\bf elliptic curves}:
they could be used as an alternative to RSA and in addition are extremely
well suited for implementation on smartcards.

Whereas the \textit{eLearning program} CrypTool\index{CrypTool} motivates and
teaches you how to use cryptography in practice, the \textit{script} provides
those interested in the subject with a deeper understanding of the mathematical
algorithms used -- trying to do it in an instructive way.
If you are alrady a little bit familiar with this field of knowledge you can
gain a fast overview about the functions delivered by CrypTool using the
{\bf menu tree} (see appendix \ref{s:appendix-menutree}).

% Bernhard Esslinger, Matthias B\"uger, Bartol Filipovic, Henrik Koy, 
% Roger Oyono and J\"org Cornelius Schneider
The authors would like to take this opportunity to thank their colleagues 
in the company and at the universities of Frankfurt, Gie\ss en, 
Siegen, Karlsruhe and Darmstadt.

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As with the eLearning program CrypTool\index{CrypTool}, the quality of the 
script is enhanced by your suggestions and ideas for improvement. 
We look forward to your feedback.

\vskip +7 pt \noindent
You will find the current version of CrypTool\index{CrypTool}
at the web sites \newline
  \href{http://www.cryptool.org}{\texttt{http://www.cryptool.org}},~
  \href{http://www.cryptool.com}{\texttt{http://www.cryptool.com}}~ or~
  \href{http://www.CrypTool.de}{\texttt{http://www.cryptool.de}}.

\vskip +7 pt \noindent
The contact people for this free open-source program are listed at the 
web site and in the ``readme'' file delivered within the 
CrypTool\index{CrypTool} package.}


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