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Course: COMP 3400, Fall 2010
School: Auburn
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4300 COMP Computer Architecture Dr. Xiao Qin Auburn University http://www.eng.auburn.edu/~xqin xqin@auburn.edu Fall, 2010 1 Outline 2 Course Objectives Course Content & Grading Laboratory Assignments Technology Trends COMP 4300: Semester Calendar See the class webpage for the most up to date version! http://www.eng.auburn.edu/~xqin/courses/comp4300 3 4 5 6 7 Download Lab 1, done...

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4300 COMP Computer Architecture Dr. Xiao Qin Auburn University http://www.eng.auburn.edu/~xqin xqin@auburn.edu Fall, 2010 1 Outline 2 Course Objectives Course Content & Grading Laboratory Assignments Technology Trends COMP 4300: Semester Calendar See the class webpage for the most up to date version! http://www.eng.auburn.edu/~xqin/courses/comp4300 3 4 5 6 7 Download Lab 1, done individually. 8 Lab 1 due Wednesday. What is Computer Architecture? Computer architecture is the conceptual design and fundamental operational structure of a computer system. Hardware Designer Computer Architect thinks about circuits, components, timing, functionality, ease of Debugging thinks about high-level components, how they fit together, how they work together to deliver performance. building architect construction engineer 9 Sony PlayStation 3 10 Resistance Fall of Man Source: images.playsyde.com 11 PS 3 vs. PS 2 12 Cell Multi-Core Processor 13 IBM's Blue Gene/L Supercomputer 14 Sixteen racks of can perform 70.7 trillion calculations per second. Cellular architecture for IBM's Blue Gene/L Supercomputer 15 A cellular architecture is a type of computer architecture prominent in parallel computing PS3 Supercomputer Source: http://gammasquad.uproxx.com/2009/12/department-of-defense-loves-the-ps3 16 Parallel Applications on Supercomputers 17 Why Study Computer Architecture? Position Software Engineer - Services Research Location San Jose, California Company IBM Part of the Work in Services Design efforts. Job Computer Science skills in: Software design, Implementation, Description Documentation skills, Software Programming (Java), XML, Virtual World experience, Eclipse RCP skills, Information Analytics, Machine Learning, System Design & data mining area, Software development, RDBMS, Web application development, Text mining, Databases, computer architecture, Artificial intelligence, programming languages, business data analytics, text analytics, Information Retrieval Skills. C Programming is a bonus. 18 Why Study Computer Architecture? Position Senior Software Engineer Location Washington, DC Company Intel Part of the You should possess at least a Bachelor of Science degree and Job possibly more advanced degrees with extensive experience as Description graphics programmer in the video game industry. Additional qualifications include: - Solid understanding of Direct X*, OpenGL*, and Shaders* - Strong experience with C/C++ language and Windows* development environment - A good communicator and comfortable with public speaking - Multithreading experience and computer architecture knowledge would be an added advantage 19 Why Study Computer Architecture? Position Software Engineer, Compilers Location Mountain View, CA Company Google Part of the Job Descriptio n Responsibilities: * Performance analysis * Development of advanced tools * Implement state of the art compiler optimizations * Integration into the GCC public repository Requirements: * Comprehensive and recognized knowledge in compilers, optimization technology, and algorithms * understanding Deep of computer architecture * Strong debugging/analytical skills * Solid practical C/C++ experience 20 Why Study Computer Architecture? 21 Why Study Computer Architecture? 22 Will it be worthwhile? Absolutely! even through few of you will become CA designers The fundamental issues and solutions translate across a wide spectrum of computer systems. Crisp solutions in the context of RISC/CISC/Parallel machines. Pioneered at the thin-end of the platform pyramid on the most-demanding applications migrate downward with time SuperServers Understand implications for softwareDepartmenatal Servers Workstations 23 Personal Computers What will you get out of COMP4300? To learn the principles behind the design of modern computer systems (e.g., tradeoffs: cost vs. performance, speed vs. flexibility) To understand the design of instruction sets To learn pipelining techniques To understand issues in hierarchical memory system design To classify and describe storage systems To demonstrate the ability to develop simulators for processors 24 Topic Coverage Textbook: Patterson and Hennessy, Computer Architecture: A Quantitative Approach, 4th Ed., 2007. Covers (These topics may change) Basics of machine organization Principles of instruction set design Instruction set principles and examples Pipelining Memory hierarchy design Storage systems and clusters 25 Am I going to read the book to you? NO! Book provides a framework and complete background, so lectures can be more interactive. You do the reading Well discuss it Projects will go beyond 26 Course Syllabus Prerequisite: COMP 3350 Computer Organization and assembly Language Programming 2-3 homework assignments and 4 lab assignments. Due at the start of class. Late assignments will NOT be accepted without prior arrangement. 1 midterm exam and 1 final exam Grading Quizzes Midterm Final Exam Home 27 Lab Assignment 15% 20% 20% 15% 30% Course Syllabus (cont.) Scale Letter grades will be awarded based on the following scale. This scale may be adjusted upwards if it is necessary based on the final grades. A [90, 100], B [80,90), C [70,80), D [60,70), F [0,60) Cheating 28 All assignments have to be done individually. Students may discuss with their friends. Assignments submitted must be yours. Please do not attempt to recycle answers from the Internet (plagiarism). Office Hours Office hours: MWF 1:50-2:30pm TA: Yun Tian, Yun Tian, tianyun@auburn.edu Office Hour: MW 9:00pm-10:00pm. Office: 2319 Shelby Center 29 Laboratory Assignments Four lab assignments (30% of final score) Programming languages (C, C++, or Java) All projects should be made to compile under a compiler on Linux. 30 Simulating Simple Machines Implement instruction set architectures Develop single and multi-cycle machines Design and implement pipelined datapath with interlocks and forwarding Controlling a diverse pipeline with a scoreboard 31 For Next Time 1. Read Chapter 1 - Fundamentals of Computer Design 2. Technology Trends 32 Questions Please ask at any time! 33
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Auburn - COMP - 3400
COMP 4300 Computer ArchitectureTechnology TrendDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Technology TrendIn reality:Big Fishes Eating Little Fishes2Technology Trend1988 Computer Food ChainCentralize
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COMP 4300 Computer ArchitecturePerformance MeasurementDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101What is Computer Architecture ?Application (Netscape)SoftwareHardwareOperating SystemCompiler(Unix;As
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COMP 4300 Computer ArchitecturePerformance MeasurementDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Example of Measuring CPU timeCPU timeCPU time= Seconds = Instructions x Cycles x Seconds= Seconds = Inst
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COMP 4300 Computer ArchitectureInstruction SetDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101The Instruction Set (ISA):a Critical InterfaceTheactualprogrammervisibleinstructionsetsoftwareinstructionsethar
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COMP 4300 Computer ArchitectureInstruction Set (cont.)Dr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Operand Locations in Four ISAClassesGPR2Code Sequence C = A + BCodefor Four Instruction SetsforStack
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COMP 4300 Computer ArchitectureInstruction Set (cont.)Dr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Memory-Memory Architectures Instruction set:(3 operands) add A, B, C(2 operands) add A, Bsub A, B, Cmul
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureTypes of InstructionsDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Review: Types of Addressing ModesAddressing Mode1. Register direct2. Immediate3. Displacement4. Register
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COMP 4300 Computer ArchitectureOperations in the Instruction SetDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Review Memory Addressing Types of Instructions2I-Format vs. R-FormatInstructions Compare wit
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureOperations in the Instruction SetDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Comparisons - What about <, <=, >,>=? bne, beq provide equality comparison slt provides magnitu
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COMP 4300 Computer ArchitectureDatapathDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Datapath for BranchInstructionsbeq rs, rt, offsetif (R[rs] = R[rt]) thenPC PC+4 + s_extend(offset<2)oprsrtoffset/im
Auburn - COMP - 3400
COMP 4300 Computer Architecture1. Single-Cycle Datapath2. Control Unit DesignDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Datapath Components for MIPS beqbeq $R1, $R2, -100if $R1=$R2 then PC = PC+4+4*(-10
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COMP 4300 Computer ArchitectureControl Unit StructureDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101ReviewADD04rsrtrdI[25:21] I[20:16] I[15:11]PC1<2InstructionADDRRDInstructionMemoryI325016
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COMP 4300 Computer ArchitectureMulticycle ImplementationDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101The Problem with Single-CycleProcessor Implementation: Performance Performance is limited by the slowest
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureMulticycle ImplementationDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101The slowest instruction.If all instructions must complete within one clock cycle, then the cycle time has
Auburn - COMP - 3400
COMP 4300 Computer ArchitecturePipeline: IntroductionDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Full Multicycle ImplementationZ eroPCWrite CondControlUnitPCWrit eALUOp2ALUControlIRWritefunctop
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COMP 4300 Computer ArchitecturePipeline: SpeedupDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Pipeline example: lwWBCan you find a problem?2Basic Pipelined Processor (lw)3Single-Cycle vs. Pipelined Exec
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureStructural HazardsDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Review: Pipeline Hazards Limits to pipelining: Hazards prevent nextinstruction from executing during itsdesign
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureData HazardsControl HazardsDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Review: Structural Hazards Attempt to use same resource twice at sametime Example: Single Memory for
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COMP 4300 Computer ArchitecturePipeline: Branch PredictionDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Review: Data Hazards Data hazards occur when data isused before it is storedTime (in clock cycles)CC
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COMP 4300 Computer ArchitectureReviewDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Supercomputer Trends in TopSIMDClusterSingle processor 500ConstellationsSMPMPPwww.top500.orgNov. 2004CPUCPUCPUCPU
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COMP 4300 Computer ArchitecturePipeline: ExceptionsDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Exceptions - Stuff Happens Exceptions definition: unexpectedchange in control flow Another form of control h
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COMP 4300 Computer ArchitectureControl for Pipelined DatapathDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Pipelining in MIPS MIPS architecture was designed to bepipelined Simple instruction format (makes
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureInstruction-level parallelism:IntroductionDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Class ExerciseConsider the following code segment1.LW R1, 0(R4)2.LW R2, 0(R5)3.AD
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COMP 4300 Computer ArchitectureLaboratory Assignment 3:Pipelined Datapath with Interlocksand ForwardingDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Introduction From your multi-cycle machine to amachine
Auburn - COMP - 3400
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureInstruction-level parallelism:Instruction DependenceDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101ILP Challenges How many instructions can we execute inparallel? Definition
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COMP 4300 Computer ArchitectureControl DependenciesDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Instruction Dependence ExampleFor the following code identify all data and name dependencebetween instruction
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureReview: Control DependenciesDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Review: Preserving the data flow Consider the following example:daddu r1,r2,r3beqz r4,Ldsubu r1,r5,
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COMP 4300 Computer ArchitectureScoreboardDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Typical Scoreboard Structure2 FP multiply, 1 FP adder, 1 FP divider, 1 integer2Using A Scoreboard: 4 stages1.Issue d
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COMP 4300 Computer ArchitectureScoreboard An ExampleDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Scoreboard Example Cycle 1InstructionstatusInstructionjkLDF634+ R2LDF245+ R3MULTDF0F2F4SUBD F8
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureInstruction-level parallelism:TomasuloDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Review: Scoreboard Techniques to deal with data hazards in instructionpipelines by: Resul
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COMP 4300 Computer ArchitectureInstruction-level parallelism:Tomasulo (cont.)Dr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Tomasulos Algorithm Tracks when operands for instructions areavailable. Minimizes
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COMP 4300 Computer ArchitectureTomasulo - A loop exampleDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Tomasulo Loop ExampleLoop: LDMULTDSDSUBIBNEZF0F4F4R1R10R1F0 F20R1R1 #8Loop This time ass
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Memory Hierarchy: IntroductionDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Memory Systems - the BigPicture withMemory provides processor Instructions Data Problem: memory is too slow and too smallProces
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COMP 4300 Computer ArchitectureSet-Associative CacheBlock IdentificationDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Direct-Mapped Cache with n one-wordblocks Pros: find data fast Con: What if access 000
Auburn - COMP - 3400
COMP 4300 Computer ArchitectureReview for Final ExamDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduFall, 20101Final Exam ReviewFocus on materials after the midterm,including Pipeline Exceptions Control for Pipelined
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COMP4300 Computer ArchitectureFall 2010Auburn UniversityInstructor: Dr. Xiao QinStudy Guide for MidtermThe midterm exam will occur on Friday, Oct. 8. This exam is closed book and closed notes. The examis worth 20% of your final grade. Although a cal
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Are Clouds Secure?Security and PrivacyImplications ofCloud ComputingSubra Kumaraswamy, SunTim Mather, RSA04/21/09 | Session ID: HOT-105Session Classification: IntermediateWhat Were Not Going to Discuss Existing aspects of information security whi
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CloudAV: N-Version Antivirus in the Network CloudJon Oberheide, Evan Cooke, Farnam JahanianElectrical Engineering and Computer Science DepartmentUniversity of Michigan, Ann Arbor, MI 48109cfw_jonojono, emcooke, farnam@umich.eduAbstractAntivirus soft
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LestWeRemember:ColdBootAttacksonLestWeRemember:ColdBootAttacksonEncryptionKeysJ.AlexHalderman,SethD.Schoen,NadiaHeninger,WilliamClarkson,WilliamPaul,JosephA.Calandrino,ArielJ.Feldman,JacobAppelbaum,andEdwardW.FeltenInProceedingsofthe2008USENIXSecurit
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Freenet: A Distributed Anonymous InformationStorage and Retrieval SystemIan Clarke1 , Oskar Sandberg2 , Brandon Wiley3 , and Theodore W. Hong414Uprizer, Inc., 1007 Montana Avenue #323, Santa Monica, CA 90403, USAian@octayne.com2Mrbydalen 12, 18252
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COMP 7370Advanced Computer and Network SecurityHomework 2 FeedbackDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduSpring, 201112Goals of Homework 2Homework 2 vs. Paper reviewingHomework 2 vs. Choosing a research probl
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COMP 7370Advanced Computer and Network SecurityHomework 3 FeedbackDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduSpring, 20111Goals of Homework 2/3 Paper reviewing Choosing a research problem2Good Organizations Jame
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L. Sweeney. k-anonymity: a model for protecting privacy. International Journal on Uncertainty,Fuzziness and Knowledge-based Systems, 10 (5), 2002; 557-570.k-ANONYMITY: A MODEL FOR PROTECTING PRIVACY1LATANYA SWEENEYSchool of Computer Science, Carnegie
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Generalizing Data to Provide Anonymity when Disclosing InformationExtended AbstractPierangela SamaratiComputer Science LaboratorySRI InternationalMenlo Park, CA 94025, USAsamarati@csl.sri.comLatanya SweeneyLaboratory for Computer ScienceMassachus
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COMP 7370Advanced Computer and Network SecurityDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduCOMP 7370, Auburn UniversitySlide 01-1Introduce YourselvesNameM.S. or Ph.D. studentYour research interestsYour ongoing res
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COMP7370 Advanced Computer and Network SecurityCold Boot Attacks on Encryption KeysA memory remanence attack aims to obtain memory images and recover cryptographickeys from DRAM after a reset or moving the DRAM to another system.1. Motivation: How to
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COMP 7370Advanced Computer and Network SecurityLec02aDRAM Remanence EffectsDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduSpring, 20111Decay at operating temperature2Decay at operating temperature3Decay at operatin
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COMP7370 Advanced Computer and Network SecurityCold Boot Attacks on Encryption Keys (2)Topics: Imaging Residual MemoryKey reconstructionIdentifying keys in memoryTopic 1: Imaging Residual Memory1. Memory Wiping Can wiping memory at POST (Power-On S
Auburn - COMP - 7370
COMP 7370Advanced Computer and Network SecurityImaging residual memoryKey reconstructionIdentifying keys in memoryDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduSpring, 20111Optimal decoding is 0 if more than nr ofth
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COMP7370 Advanced Computer and Network SecurityCold Boot Attacks on Encryption Keys (3)Topics:1. Identifying keys in memory2. Attacking encrypted disks3. CountermeasuresTopic 1: Identifying keys in memory Question: How will you identify keys in RAM
Auburn - COMP - 7370
COMP7370 Advanced Computer and Network SecurityCold Boot Attacks on Encryption Keys (4)Topics:1. NSF CCLI-TUES11 Conference2. Homework 1, Question 13. CountermeasuresTopic 1: CCLI-TUES11 Conf. About CS conferences/workshop CCLI-TUES11 -> Conf. in
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COMP7370 Advanced Computer and Network SecurityCloudAV: N-Version Antivirus in the Network Cloud (1)Topics:1. Research Tip: How to choose a research topic?2. Security of cloud computingAnnouncement: Homework 1 is due by tonight at 11:55pm.Topic 1: R
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COMP7370 Advanced Computer and Network SecurityTopics:1. Comments on Homework 12. Introduction to Project 1Announcement: Project 1 is due at 11:55pm on March 1st.Topic 1: Comments on Homework 1 No new findings. See slide 2o derived from Table 1 and
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COMP 7370Advanced Computer and Network SecurityComments on Homework 1Dr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduSpring, 20111No New Findings2Uncomparable items3Good presentation?4Better presentation?5Highlig
Auburn - COMP - 7370
COMP7370 Advanced Computer and Network SecurityCloudAV: N-Version Antivirus in the Network Cloud (2)Topics:1. Software as a service (SaaS)2. Security as a ServiceTopic 1: Software as a service (SaaS) Can you give some examples?o Hotmail.o Google d
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COMP7370 Advanced Computer and Network SecurityCloudAV: N-Version Antivirus in the Network Cloud (3)Topics:1. Motivations2. Basic IdeasTopic 1: Motivations (Limitations) Antivirus softwareo Malicious/unwanted softwareo $10 billion dollars (2008)o
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COMP 7370Advanced Computer and Network SecurityCloudAV: N-Version Antivirus inthe Network CloudDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduSpring, 20111Vulnerability Window2Vulnerability Window (cont.)3Antivirus
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COMP7370 Advanced Computer and Network SecurityAnnouncement: midterm exam March 3rd, 2011.CloudAV: N-Version Antivirus in the Network Cloud (4)Topics:1. Architecture and Design Issues2. Evaluation (not covered, next time)Topic 1: Architecture Basic
Auburn - COMP - 7370
COMP 7370Advanced Computer and Network SecurityCloudAV: N-Version Antivirus inthe Network CloudDr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduSpring, 20111Implementation2Dashboard3Executable Launches4Executable L
Auburn - COMP - 7370
COMP 7370Advanced Computer and Network SecurityComments on Project 1Dr. Xiao QinAuburn Universityhttp:/www.eng.auburn.edu/~xqinxqin@auburn.eduSpring, 2011123456Good Scripts Well document Readability is good Considers many cases7The Best