Codes and ciphers
Callery, Sean2006
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This volume is a history of the development of codes and ciphers, and information and advice on how to make codes (whether by pencil and paper, or by computer) and how to break codes. The topics covered include: Native American smoke signals; Morse code, Braille, ASCII computer language; letter substitution; and many more.
Main title:
Codes and ciphers / Sean Callery.
Author:
Imprint:
London : Collins, 2006.
Collation:
191 p. : col. ill. ; 21 cm.
Series title:
Notes:
Includes bibliographical references (p. 186) and index.
ISBN:
9780007228034 (pbk)
Dewey class:
652.8652.8
Language:
English
BRN:
1451164