- Easier - A code is
a system of symbols, letters, words, or signals
that are used instead of ordinary words and numbers
to send messages or store information. A code is
used to keep the message short or to keep it
- Harder - Codes and
ciphers are forms of secret communication. A code
replaces words, phrases, or sentences with groups
of letters or numbers, while a cipher rearranges
letters or uses substitutes to disguise the
message. The technology of such secret
communication is called cryptology.
- Secret writing has been employed about as long
as writing has existed. Cryptology has long been
employed by governments, military, businesses, and
organizations to protect their messages. Today,
encryption is used to protect storage of data and
transactions between computers.
for Scouts and Cubs
- Ordered from beginner to more difficult, these
codes can be used by Scouts and non-scouts of all
Cryptographic Compendium by John J. G.
- This site contains a outline of the various
types of cipher systems that have been used
historically, and tries to relate them to each
other while avoiding a lot of mathematics.
Nazi Secrets (NOVA
- At this site, you learn
how the Nazi party coded their messages for
privacy. You can even send a disguised message or
try to break someone else's code!
Secret Language by
- Here is a great explanation of substitution and
- Websites By Kids For
Security Agency's Kid's Page
- Have fun solving challenging problems.
Year's Page on Spies, Codes and
- Learn how to send secret messages.Also, a site
on code making and breaking.
of the Encrypted
(1999 ThinkQuest Project)
- This website explains the
importance, uses, and historical context of
- This website covers
various aspects of data encryption across both
local networks and the Internet.
- Information on cracking secret codes and
- Several More Websites
- This is a student page with many links
introducing the history and basic theories of
- and cryptanalysis.
- This site covers several different types of
encryption currently in use including Caesar and
other substitution ciphers, Vigenere, Gronsfeld,
Enigma, Public Key encryption (RSA), and Pretty
Good Protection (PGP).
- This page provides an introduction into various
Code and the Phonetic Alphabets
- Here you find a complete Morse Code directory
- Related Websites:
- 2) Morse Code Translator (Boy Scouts of
- This tool converts written text to Morse Code
and also can convert Morse Code to written
- 3) Morse Code and Phonetic Alphabets http://www.soton.ac.uk/~scp93ch/morse/
- 4) Morse Code Letters http://www.happychild.org.uk/ifs/00003mrs.htm
- 5) WWW Morse Code Generator http://www.proximity.com.au/~tom/morsecodes.html
- 6) The First Digital code.........International
Morse Code http://pages.prodigy.com/MNPM98A/cw.htm
- Here visitors can glimpse some of the people
who devoted their lives to cryptology and national
defense, the machines they built, the techniques
they used, and the places where they worked.
- This website has short
articles on codes throughout history, Java-based
cipher programs to try, and an online version of
the Secret Code Breaker program.
- Websites for Teachers
Nazi Secrets (Teacher's Guide at NOVA
- This guide accompanies the program of the same
- Send a coded message http://www.pbs.org/wgbh/nova/decoding/send.html
- A Simple Cipher http://www.pbs.org/wgbh/nova/decoding/break.html
- More Resources http://www.pbs.org/wgbh/nova/decoding/
to Make Invisible Ink (Grade
- Students learn how to make two types of
invisible ink and write a message with each type of
ink. They are asked to compare and contrast each
type of ink.
- Created by
1/99, Updated, 1/01.