Chapter 1 Notes

Chapter 1 Notes - Chapter 1 Notes 1 CHAPTER 1 Learning...

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Chapter 1 Notes 1 CHAPTER 1 Learning Objectives Upon completion of this material, you should be able to: Define information security Relate the history of computer security and how it evolved into information security Define key terms and critical concepts of information security as presented in this chapter Discuss the phases of the security systems development life cycle Present the roles of professionals involved in information security within an organization Introduction Information security: a “well-informed sense of assurance that the information risks and controls are in balance.” — Jim Anderson, Inovant (2002) c Necessary to review the origins of this field and its impact on our understanding of information security today The History of Information Security Began immediately after the first mainframes were developed Groups developing code-breaking computations during World War II created the first modern computers Physical controls to limit access to sensitive military locations to authorized personnel Rudimentary in defending against physical theft, espionage, and sabotage The 1960s Advanced Research Project Agency (ARPA) began to examine feasibility of redundant networked communications Larry Roberts developed ARPANET from its inception The 1970s and 80s ARPANET grew in popularity as did its potential for misuse Fundamental problems with ARPANET security were identified No safety procedures for dial-up connections to ARPANET Nonexistent user identification and authorization to system Late 1970s: microprocessor expanded computing capabilities and security threats Information security began with Rand Report R-609 (paper that started the study of computer security) s Scope of computer security grew from physical security to include: Safety of data Limiting unauthorized access to data Involvement of personnel from multiple levels of an organization MULTICS Early focus of computer security research was a system called Multiplexed Information and Computing Service (MULTICS) C First operating system created with security as its primary goal Mainframe, time-sharing OS developed in mid-1960s by General Electric (GE), Bell Labs, and Massachusetts Institute of Technology (MIT) a Several MULTICS key players created UNIX Primary purpose of UNIX was text processing The 1990s Networks of computers became more common; so too did the need to interconnect networks Internet became first manifestation of a global network of networks In early Internet deployments, security was treated as a low priority
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Chapter 1 Notes 2 The Present The Internet brings millions of computer networks into communication with each other— many of them unsecured Ability to secure a computer’s data influenced by the security of every computer to which it is connected What is Security? “The quality or state of being secure—to be free from danger”
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Chapter 1 Notes - Chapter 1 Notes 1 CHAPTER 1 Learning...

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