From number theory to secret codes

Front Cover
Hilger, Jan 1, 1987 - Mathematics - 86 pages
This text/software package shows how a knowledge of number theory can be used to write messages in a secret form. For those with secrets but no interest in number theory, the cryptographic section can easily be used to encipher & decipher messages without any knowledge of number theory. The rest of the text & programs explain all the mathematics required to understand why the cryptographic system works. A knowledge of arithmetic is required but no calculus is needed. Exercises & examples are provided throughout the text. Suitable for advanced secondary school & undergraduate students of mathematics & teachers of mathematics, particularly of number theory. Software: available on 3.5" disks for IBM compatible machines.

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Continued Fractions and Rational Approximations
Modular Arithmetic

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