Foundations of Network and Foundations of Network and Computer - - PowerPoint PPT Presentation

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Foundations of Network and Foundations of Network and Computer - - PowerPoint PPT Presentation

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Foundations of Network and Foundations of Network and Computer Security Computer Security J ohn Black J CSCI 6268/TLEN 5831, Fall 2004 Introduction UC Davis PhD in 2000 Cryptography Interested in broader security as well

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Foundations of Network and Foundations of Network and Computer Security Computer Security

J John Black

CSCI 6268/TLEN 5831, Fall 2004

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Introduction

  • UC Davis

– PhD in 2000 – Cryptography – Interested in broader security as well

  • UNR two years
  • CU Boulder two years
  • Computer and Communications Security

Center

  • My teaching style and personality
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This Class

http://www.cs.colorado.edu/~jrblack/class/csci6268/f04/

  • Use above for all materials

– Available from my home page – Available from WebCT as well

  • This is a CAETE course

– About 4 distance-learning students

  • Any live students today?

– Lectures from WebCT, I think – Lectures on VHS in library in Math bldg

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Logistics

  • TR, ECCS 1B12, 9:30am – 10:45am
  • Final, Monday Dec. 13th, 10:30am – 1pm
  • Office Hours

– ECOT 627, W 4-4:50pm; R 9:00-10:00am – More as needed – jrblack@cs.colorado.edu (better than dropping by without an appt)

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Grading

  • See course info sheet

– Let’s go over it now

  • Course Topics

– Why no book? – Cryptography and Network Security

  • Quite a blend of math, hacking, and thinking
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Topics

  • Policy, Law, History

– Today

  • Cryptography (can’t help it)

– Not how to make it, but how to use it

  • Hacking

– Buffer overruns, WEP attack, TCP session hijacking, DDoS, prevention – Some hands-on, but depends on distance students

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Class Format

  • Informal

– Small class – Ask questions – Class participation counts for 5% of grade – (Not sure what to do with distance folks for this yet.)

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History

  • Early days of Cryptography
  • Lucifer and DES
  • Export restrictions

– 40 bit keys!

  • Public Key Cryptography

– MI6 had it first?!

  • Differential cryptanalysis

– NSA knew first

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Who is the NSA?

  • National Security Agency

– Huge – Fort Meade, MD – More mathematicians than anywhere – Classified budget

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Laws

  • DMCA

– Felten RIAA/SDMI case most famous

  • 2001 SDMI challenge

– Many believe it’s the right idea, but a bad law – All reverse-engineering is sketchy

  • CALEA (1994)

– Communications Assistance for Law Enforcement Act – Recently ruling says VoIP must provide compliance

  • Still in the courts
  • Patriot Act
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Case Study

  • Accountant for crime ring

– Used PGP

  • Pretty Good Privacy
  • Phil Zimmerman

– Feds seized computer

  • Couldn’t read files!

– Subpoena for keylogger – Worked like a charm!

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Policy

  • Government has attempted to control

encryption before

– Skipjack – Key Escrow – Clipper Chip

  • Ultimately failed due to massive protest

from “privacy advocates”

– Electronic Frontier Foundation (John Gilmore)