6.857: Computer and Network Security

Lectures and Handouts

Lecture 1 (Wednesday, February 5): Introduction

• Course information handout
• Lecture 1 Notes: Introduction

Lecture 2 (Monday, February 9): Cancelled due to snowstorm

Problem Set 1

• Problem Set 1
• Ciphers
• Dictionary

Lecture 3 (Wednesday, February 11): Security principles, growth of cryptography

• Slides
• Lecture Notes

Recitation 1 (Friday, February 13): One-time pad

• otp.py

Lecture 4 (Tuesday, February 17): One-time pad

• Lecture Notes

Lecture 5 (Wednesday, February 18): Hash Functions

• Lecture Notes

Recitation 2 (Friday, February 20): Floyd's Two Finger Algorithm

• Recitation Notes

Problem Set 2

• Problem Set 2

Lecture 6 (Monday, February 23): Hash Functions II

• Lecture Notes

Lecture 7 (Wednesday, February 25): Cryptocurrency

• Lecture Notes
• Nakamoto Paper
• Princeton bitcoin overview

Recitation 3 (Friday, February 27): Hash functions

• Recitation Notes

Lecture 8 (Monday, March 2): Shamir Secret Sharing and block ciphers

• Lecture Notes
• AES spec
• Shamir Paper

Lecture 9 (Wednesday, March 4): Block cipher modes of operation

• Lecture Notes
• Desai paper

Recitation 4: IND-CPA, Padding oracles

• Recitation Notes
• padding_oracle.py

Lecture 10 (Monday, March 9): Stream Ciphers

• Spritz
• Stream Ciphers
• ChaCha

Problem Set 3

• Problem Set 3

Lecture 11 (Wednesday, March 11): Message Authentication Codes

• Lecture Notes
• EAX
• How to Choose an Authenticated Encryption Mode

Lecture 12 (Monday, March 16): "Crypto math"

• Lecture Notes

Lecture 13 (Wednesday, March 18): Group Theory

• Lecture Notes

Lecture 14 (Monday, March 30): El Gamal

• Lecture Notes

Problem Set 4

• Problem Set 4
• Unlinkable Serial Transactions
• USTclient.py

Lecture 15 (Wednesday, April 1): RSA

• Lecture Notes
• Attacks on RSA
• New Directions in Cryptography

Lecture 16 (Monday, April 6): Digital Signatures

• Lecture Notes

Lecture 17 (Wednesday, April 8): Gap Groups

• Lecture Notes

Lecture 18 (Monday, April 13): Zero Knowledge Proofs

• Lecture Notes

Lecture 21 (Monday, April 27): Voting

• Lecture Notes