Resources for Dealing with Encryption Problems
March 28, 2001
1. Conversion between text and numbers
Note that some schemes involve converting sequences of, perhaps ten,
characters simultaneously to numbers. One method, of course, is
manual table lookup. A table for conversion to ASCII is available
with a simple encryption example.
Conversion between text and numbers can be done in many ways with a
computer program written in almost any programming language.
 Conversion of text to ASCII decimal

Example of a program in the language ``C''
for converting text to ASCII: anum.c.
 Conversion of ASCII decimal to text

Example of a program in the language ``C''
for converting ASCII to text: numa.c.
2. Encryption of sequences of numbers
 Maple code

Code for computing a high power of a sequence of
numbers for a given modulus: hipo.
 Sample Maple session

A sample Maple session for encoding and then decoding
the ASCII decimal sequence for the word ``Tomorrow'':
msession.
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