[JoGu]

Classical Cryptology

Some material
a7Hzq .#5r<
kÜ\as TâÆK$
ûj(Ö2 ñw%h:
Úk{4R f~`z8
¤˜Æ+Ô „&¢Dø

Some Theory

Furthermore you might be interested in letter frequency tables:

Perl Programs

To use Perl you need a Perl interpreter on your system. You get it here:

http://www.perl.com/pub/a/language/info/software.html
In a Unix system add a first line to each script:
#!/usr/local/bin/perl
or whatever the path to your Perl interpreter is. Then make the script executable and call it (e. g.) as follows:
myscript.pl < input.txt
where input.txt is your input file. If you want to catch the output in another file, use (e. g.)
myscript.pl < input.txt > output.txt
In a Windows system you probably should call the script from the command line as follows:
perl myscript.pl < input.txt
perl myscript.pl < input.txt > output.txt

Author: Klaus Pommerening, September 29, 1999; last changed April 15, 2012.