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Free Presentations in PowerPoint format

Secure Computation 

Famous Unsolved Codes and Ciphers

Cipher Machines

Good Guys and Bad Guys - Crypto 

Steganography - Invisible Ink and more 

Encryption  


For Kids

Undercover Science (games, flash)

The Code Master

Thunk - Secret Messages for Kids 

Multicode Machine

Can you crack a code?

Spy Page

Codes, Ciphers, and Secret Messages

Send Secret Messages

The Morse Code Game

Invisible Ink

Crack the Cipher - Decoding Nazi Secrets

Tales of the Encrypted

The Secret Language 


For Teachers

Codes and Ciphers (includes overheads)

Jefferson's Cracking the Code (Lewis and Clark)

How to make invisible ink

Free Clipart

Free Templates






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