Introduction to Information Security - US-CERT | United States

Introduction to Information Security - US-CERT | United States

3 Pages · 2008 · 55 KB · English

information security; that is, internet users want to be assured that type of network connections, phone numbers, and access and authentication procedures.

Introduction to Information Security - US-CERT | United States free download


Introduction to Information Security As of January 2008, the internet connected an estimated 541.7 million computers in more than 250 countries on every continent, even Antarctica (Source: Interne\ t Software Consortium’s Internet Domain Survey; www.isc.org/index.pl). The internet is not a single network, but a worldwide collection of loosely connected networks that are accessible by individual computer hosts, in a variety of ways, to anyone with a computer and a network connection. Thus, individuals and organizations can reach any point on the internet without regard to national or geographic boundaries or time of day. However, along with the convenience and easy access to information come risks. Among them are the risks that valuable information will be lost, stolen, changed, or misused. If information is recorded electronically and is available on networked computers, it is more vulnerable than if the same information is printed on paper and locked in a file cabinet. Intruders do not need to enter an office or home; they may not even be in the same country. They can steal or tamper with information without touching a piece of paper or a photocopier. They can also create new electronic files, run t\ heir own programs, and hide evidence of their unauthorized activity. Basic Security Concepts Three basic security concepts important to information on the internet are confidentiality, integrity, and availability. Concepts relating to the people who use tha\ t information are authentication, authorization, and nonrepudiation. When information is read or copied by someone not authorized to do so, the result is known as loss of confidentiality. For some types of information, confidentiality is a very important attribute. Examples include research data, medical and insurance records, new product specifications, and corporate investment strategies. In some locations, there may be a legal obligation to protect the privacy of individuals. This is

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