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- The
Topic:
- Codes,
Ciphers &
- Secret
Messages
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- 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
secret.
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- 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.
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- 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.
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- Codes
for Scouts and Cubs
- http://www.scouting.org.za/codes/
- Ordered from beginner to more difficult, these
codes can be used by Scouts and non-scouts of all
ages.
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- A
Cryptographic Compendium by John J. G.
Savard
- http://home.ecn.ab.ca/~jsavard/crypto/entry.htm
- 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.
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- Decoding
Nazi Secrets (NOVA
Online)
- http://www.pbs.org/wgbh/nova/decoding/
- 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!
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- The
Secret Language by
Ron Hipschman
- http://www.exploratorium.edu/ronh/secret/secret.html
- Here is a great explanation of substitution and
transposition ciphers.
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- Websites By Kids For
Kids
- National
Security Agency's Kid's Page
- http://www.nsa.gov/programs/kids/index.html
- Have fun solving challenging problems.
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- Science
Year's Page on Spies, Codes and
Ciphers
- http://www.scienceyear.com/outthere/index.html?page=/outthere/spy/index.html
- Learn how to send secret messages.Also, a site
on code making and breaking.
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- Tales
of the Encrypted
(1999 ThinkQuest Project)
- http://library.thinkquest.org/28005/flashed/index2.shtml
- This website explains the
importance, uses, and historical context of
cryptography.
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- Data
Encryption (1999
ThinkQuest Project)
- http://library.thinkquest.org/27158/
- This website covers
various aspects of data encryption across both
local networks and the Internet.
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- Secret
Code Breaker
- http://codebreaker.dids.com/
- Information on cracking secret codes and
ciphers.
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- Several More Websites
- Cryptography
- http://www.ridex.co.uk/cryptology/
- This is a student page with many links
introducing the history and basic theories of
cryptography
- and cryptanalysis.
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- Cryptography
- http://lor.cc.trincoll.edu/academics/departments/cpsc/cryptography/index.html
- 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).
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- Introduction
to Cryptography
- http://www.ssh.fi/tech/crypto/intro.html
- This page provides an introduction into various
cryptographic techniques.
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- Morse
Code and the Phonetic Alphabets
- http://www.soton.ac.uk/~scp93ch/refer/alphabet.html
- Here you find a complete Morse Code directory
including punctuation.
- Related Websites:
- 2) Morse Code Translator (Boy Scouts of
America) http://www.bsa.scouting.org/fun/morse/index.html
- This tool converts written text to Morse Code
and also can convert Morse Code to written
text.
- 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
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- National
Cryptologic Museum
- http://www.nsa.gov/museum/tour.html
- 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.
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- Secret
Code Breaker
- http://codebreaker.dids.com
- 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.
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- Websites for Teachers
- Decoding
Nazi Secrets (Teacher's Guide at NOVA
Online)
- http://www.pbs.org/wgbh/nova/teachers/programs/2615_decoding.html
- This guide accompanies the program of the same
name (Above).
- 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/
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- How
to Make Invisible Ink (Grade
4-6)
- http://www.iit.edu/~smile/ch9602.html
- 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.
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-
- Created by
Annette
Lamb and
Larry
Johnson,
1/99, Updated, 1/01.
Update by
Nancy Smith
7/02
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