Day 6: Digital Signatures & HTTPS

Lecture Topics

• notes
• digital signatures
  • security game
  • schnorr signatures
• how HTTPS works

Problems

• required:

  • Schnorr signatures:
    • hash_to_ed25519_exp
    • schnorr_sign
    • schnorr_verify

• bonus:

  • attacking Diffie-Hellman key exchange:
    • written question 1: describe your attack
    • implement your attack as a class with:
      • a constructor: AttackDH.__init__
      • a message handler: AttackDH.handle_msg
      • the class’s docstring contains the test for the attack