ePayment Security ECOM 6016 Electronic Payment Systems • Keep financial data secret from unauthorized parties (privacy) – CRYPTOGRAPHY Lecture 3 ePayment Security • Verify that messages have not been altered in transit (integrity) – HASH FUNCTIONS • Prove that a party engaged in a transaction ( (nonrepudiation) ) – DIGITAL SIGNATURES • Verify identity of users (authentication) – PASSWORDS‚ DIGITAL CERTIFICATES THE UNIVERSITY OF HONG KONG FEB/MAR 2012 © 2012 MICHAEL I. SHAMOS
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Populations and Sampling Chapter 7 7 Populations and Sampling The Rationale of Sampling Steps in Sampling Types of Sampling Inferential Statistics: A Look Ahead The Case Study Approach The Rationale of Sampling In Chapter One‚ we established the fact that inductive reasoning is an essential part of the scientific process. Recall that inductive reasoning moves from individual observations to general principles. If a researcher can observe a characteristic of interest in all members of a population
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In her essay “The Fourth of July”‚ Audre Lorde conveys her anger toward American society. Her anger is caused by the racism and discrimination in her country. Although she clearly establishes her claim‚ Lorde uses irony to express her opinions yet control her anger. Lorde’s essay was written in response to her family’s trip to Washington D.C. the summer after her graduation from eighth grade. In it‚ she writes‚ “the waitress was white‚ and the counter was white‚ and the ice
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GNBCY Practice Exam Solutions – Chapter 14 1. Part (a) Solution (Learning Objective 1): The common fixed costs of $10‚000 (or $130‚000 - $120‚000) are irrelevant to this decision. Part (a) Solution (Learning Objective 2): CM that would be lost if department is discontinued $(150‚000) Less fixed costs that can be avoided if department is discontinued 120‚000 Increase (decrease) in net operating income $ (30‚000) Based on this information alone‚ because the company’s net operating
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Project Management Body Of Knowledge (PMBOK®) Guide – 5th Edition February 21‚ 2013 1 PMBOK 4th Edition PMBOK 5th Edition Released in 2008 Released in 2013 5 Process Groups 5 Process Groups 9 Knowledge Areas 10 Knowledge Areas 42 Processes 47 Processes PMBOK 5th Edition 2 PMBOK 4th Edition PMBOK 5th Edition • Integration Management • Scope Management • Time Management • Cost Management • Quality Management • Human Resources Management • Communications Management • Risk Management
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Networks During the Program Student Worksheet 1 What are networks? 1. Describe the purpose of networking computers. 2. Describe the two types of network: a. LAN b. WAN 3. List the core business functions of Destra. 4. As a retailer‚ describe how Destra is different to more traditional retailers. 5. What does Destra’s network consist of? 6. What is VPN and what is its purpose? 7. Describe
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Without the Fourth Amendment of the Constitution‚ America would be a very different place. The framers of the United States Constitution anticipated the necessity of an amendment that would protect citizens from a government that would potentially overstep its boundaries. The Fourth Amendment was included in the Bill of Rights as one of the guarantees afforded to all citizens protecting rights to privacy and illegal search and seizure. In today’s society with the new technologies for surveillance
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CHAPTER 2 SOLUTIONS TO SUPPLEMENTARY PROBLEMS FROM SCOTT TEXTBOOK 6th edition 11. Several reasons can be suggested why oil company managers have reservations about RRA: • The discount rate of 10% might not reflect the firm’s cost of capital. • Low reliability. RRA involves making a large number of assumptions and estimates. While SFAS 69 deals with low reliability in part by requiring end-of-period oil and gas prices to be used (rather than prices anticipated when the reserves are expected
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Zero-day attacks are meaner‚ more rampant than we ever thought‚ from http://arstechnica.com /security/ 2012/ 10 /zero-day-attacks-are-meaner-and-more-plentiful-thanthought/. 2. SECURITY POLICY: TARGET‚ CONTENT‚ & LINKS‚ from http://csrc.nist.gov/nissc/1998/proceedings/paperG4.pdf. 3. Anatomy of the Hack - Hands-on Security‚ from http://w ww.slideshare.net/NewBU/anatom y-of-thehack-handson-security-information-assurance-dub. 4. Hacker methodology‚ from http://www.hackersecuritymeasures
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QUESTION1 Power Problems Alternating current (AC)‚ which is “food” to PCs and other network devices‚ is normally 110 volts and changes polarity 60 times a second (or 60 Hertz). These values are referred to as line voltage. Any deviation from these values can create problems for a PC or other network device. Power problems fall into three categories: * Overage * Underage * Quality Power Overage Problems During a power overage‚ too much power is coming into the computer. Power overage
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