Intro to Encryption

SPEAKER: Soo Yuen Jien

Encryption methods

Transposition

• General Transposition
• Rail Fence Cipher

Substitution

• Caesar’s Shift Cipher
• General Substitution
• Frequency Analysis Attack
• Vignere Cipher
  • use a sequence of Caesar’s shift cipher
  • Vignere square (represents all possible shifts)
  • Charles Babbage story