Edge books. Making and breaking codes

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Speaking secret codes

  • Bell-Rehwoldt, Sheri
2011
Discusses different methods for speaking secret codes and describes spoken codes from throughout history.

Making secret codes

  • Gregory, Jillian
2011
Discusses different methods for creating secret codes.

Breaking secret codes

  • Gregory, Jillian
2011
Discusses different code-breaking methods and how they have been used throughout history.
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