Codes, ciphers, and secret writing.

by

96 pages

English language

Published May 9, 1972 by Simon and Schuster.

ISBN:
978-0-671-65201-2
Copied ISBN!
OCLC Number:
605013

View on OpenLibrary

4 stars (1 review)

Explains in simple terms how to encode and decode messages in various ciphers, describes coding machines, and gives formulas for invisible ink.

8 editions

Subjects

  • Ciphers -- Juvenile literature
  • Ciphers