usc-csci530-f08-l02

usc-csci530-f08-l02 - Copyright © 1995-2008 Clifford...

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Unformatted text preview: Copyright © 1995-2008 Clifford Neuman - UNIVERSITY OF SOUTHERN CALIFORNIA - INFORMATION SCIENCES INSTITUTE USC CSci530 Computer Security Systems Lecture notes Fall 2008 Dr. Clifford Neuman University of Southern California Information Sciences Institute Copyright © 1995-2008 Clifford Neuman - UNIVERSITY OF SOUTHERN CALIFORNIA - INFORMATION SCIENCES INSTITUTE Administration • Assignment 1 on course web page – http://ccss.usc.edu/530 – Due 24 September 2008 • All qualified students have been granted D clearance. – If you are still waiting for D clearance, please see me. Copyright © 1995-2008 Clifford Neuman - UNIVERSITY OF SOUTHERN CALIFORNIA - INFORMATION SCIENCES INSTITUTE Administration • Lab Component (see http://ccss.usc.edu/530L) – Instructor is David Morgan – Instruction 4:30-5:20 Fridays in OHE 122 ▪ WebCast via DEN ▪ Today’s Lab instruction is a 30 minute introduction – Hands on sections ▪ You must choose from 7 sessions per todays instructions. ▪ Must sign up for your preference of session. ▪ Details will be provided this afternoon. Copyright © 1995-2008 Clifford Neuman - UNIVERSITY OF SOUTHERN CALIFORNIA - INFORMATION SCIENCES INSTITUTE Administration • Symantec Fellowship – Fellowship for graduate students in computer security. – http://www.symantec.com/about/careers/college/fellowship.jsp – Application Deadline is December 12 – I will provide recommendations for up to 4 students. Copyright © 1995-2008 Clifford Neuman - UNIVERSITY OF SOUTHERN CALIFORNIA - INFORMATION SCIENCES INSTITUTE CSci530: Security Systems Lecture 2 – September 5, 2008 Cryptography Dr. Clifford Neuman University of Southern California Information Sciences Institute Copyright © 1995-2008 Clifford Neuman - UNIVERSITY OF SOUTHERN CALIFORNIA - INFORMATION SCIENCES INSTITUTE Cryptography and Security • Cryptography underlies many fundamental security services – Confidentiality – Data integrity – Authentication • It is a basic foundation of much of security. Copyright © 1995-2008 Clifford Neuman - UNIVERSITY OF SOUTHERN CALIFORNIA - INFORMATION SCIENCES INSTITUTE A Brief History • Steganography: “covered writing” – Demaratus and wax tablets – German microdots (WWII) . – Flaw: Discovery yields knowledge – Confidentiality through obscurity • Cryptography: “secret writing” – TASOIINRNPSTO and TVCTUJUVUJPO Copyright © 1995-2008 Clifford Neuman - UNIVERSITY OF SOUTHERN CALIFORNIA - INFORMATION SCIENCES INSTITUTE Encryption used to scramble data PLAINTEXT PLAINTEXT CIPHERTEXT ENCRYPTION (KEY) DECRYPTION (KEY) + + Copyright © 1995-2008 Clifford Neuman - UNIVERSITY OF SOUTHERN CALIFORNIA - INFORMATION SCIENCES INSTITUTE The Basics of Cryptography • Two basic types of cryptography – TASONO PINSTIR ▪ Message broken up into units ▪ Units permuted in a seemingly random...
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usc-csci530-f08-l02 - Copyright © 1995-2008 Clifford...

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