Ancient cryptosystems
ABCDEFGHIJKLMNOPQRSTUVWXYZ
ZYXWVUTSRQPONMLKJIHGFEDCBA
2000 BC in Egypt - hieroglyphics
- used to decorate tombs - purposely cryptic - to make the text appear more regal
Chinese used ideographs
- to hide the meaning of their written language
India used secret writing
- to communicate with a network of spies in country
- similar to "pig latin" (igpay atinlay)