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Computer Security Many commercial packages are designed with security features that control who can access the computer These types of access controls use a process called identification and authentication Identification verifies that the user is a valid user and authentication verifies that the user is who he or she claims to be Three common methods of authentication are remembered information possessed objects and biometric devices With remembered information a user is required to enter a word or series of characters that match an entry or security file in the computer Most multi-user operating systems provide for a logon code a user ID and a password all forms of remembered information that all must be entered correctly before a user is allowed to use an application program A logon code usually identifies the application and a user ID identifies the user A password usually is confidential often known only by the user and the system administrator Baker and Danville pg 29-47 A possessed object is any item that a user must carry to gain access to the computer facility Examples of possessed objects are badges cards and keys Possessed objects are often used in conjunction with a personal identification number PIN which is a numeric password Price pg 40-68 A biometric device is one that identifies personal characteristics to authenticate a user Examples of personal characteristics are fingerprints voice patterns signature hand size and retinal eye patterns A biometric device usually translates a users personal characteristics into a digital code that is compared to a digital code stored in the computer Victors pg 22-85 If the digital code in the computer does not match the users code access is denied Each of these authentication techniques has advantages and disadvantages The table below outlines the major advantage and disadvantage of each technique Table Chart Advantages and Disadvantages of
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