The keyboard code
Article Abstract:
A secret code based on a typewriter or computer keyboard is described. The code involves relabeling the keyboard with letters in alphabetical order.
Publication Name: Boys' Life
Subject: General interest
ISSN: 0006-8608
Year: 1993
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Caesar's code
Article Abstract:
Julius Caesar invented a secret code for sending messages. Instructions are presented for using the code and constructing a simple code machine.
Publication Name: Boys' Life
Subject: General interest
ISSN: 0006-8608
Year: 1992
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The tic-tac-toe code
Article Abstract:
Step-by-step instructions are presented for setting up and using a secret code system that uses letters placed in three tic-tac-toe grids.
Publication Name: Boys' Life
Subject: General interest
ISSN: 0006-8608
Year: 1993
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