Classical cryptosystems&

codebreakingJenny Wilson • 26 March 2020

1

Classical cryptosystems&

codebreaking

Classical cryptosystems& codebreaking

Jenny Wilson • 26 March 2020

1 CryptosystemsCode – replace entire words by symbolsCipher – replace individual letters by symbols

2 Steganography

3 Steganography:invisible ink

• tattoo

• invisible ink

• microdots

• pinpricks

• ...

1

Classical cryptosystems&

codebreaking

Classical cryptosystems& codebreaking

Jenny Wilson • 26 March 2020

This talk will give a briefhistory of some classicalencryption techniques, andhow to defeat them.

1 CryptosystemsCode – replace entire words by symbolsCipher – replace individual letters by symbols

2 Steganography

3 Steganography:invisible ink

• tattoo

• invisible ink

• microdots

• pinpricks

1

Meeting virtually for the remainder of the Winter 2020 term, Thursdays at 4pm EDT