usc-csci530-f08-l02

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

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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 Todays 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 Neuman -...

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