c# qr code library Permissions and Rights in Visual C#

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Permissions and Rights
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Windows distinguishes two types of access privileges: permissions and rights. A permission is the ability to access a particular object in some defined manner for example, to write to an NTFS file or to modify a printer queue. A right is the ability to perform a particular systemwide action, such as logging on or resetting the clock. The owner of a resource (or an administrator) assigns permissions to the resource via its properties dialog box. For example, if you are the printer owner or have administrative privileges, you can restrict someone from using a particular printer by visiting the properties dialog box for that printer. Administrators set rights via the Local Security Policy console in the Administrative Tools folder. If you have an administrative account and you re using Windows XP Professional, you can use Local Security Policy to grant someone the right to load a device driver. Note In this book, as in many of the Windows XP messages and dialog boxes, privileges serves as an informal term encompassing both permissions and rights.
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The backbone of Windows XP security is the ability to uniquely identify each user. During setup or at any later time a computer administrator creates a user account for each user. The user account is identified by a user name and (optionally) a password, which the user provides when logging on to the system. Windows then controls, monitors, and restricts access to system resources based on the permissions and rights associated with each user account by the resource owners and the system administrator.
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Microsoft Windows XP Inside Out, Second Edition In addition to such normal user accounts, Windows provides two special accounts that have predefined sets of permissions and rights: the Administrator account and the Guest account.
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Part 2: Keeping Your System Secure
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Every computer running Windows XP has a special account named Administrator. This account has full rights over the entire computer. It can create other user accounts and is generally responsible for managing the computer. Many system features and rights are off limits to accounts other than Administrator (or another account that belongs to the Administrators group). The Guest account resides at the other end of the privilege spectrum. It is designed to allow an infrequent or temporary user such as a visitor to log on to the system without providing a password and use the system in a restricted manner. (By default, the Guest account is disabled on a clean install of Windows XP; no one can use an account that s disabled.) The Guest account is also used to access shared network resources on your computer when Simple File Sharing is enabled.
Guest account
For information about using the Administrator account, see What Happened to the Administrator Account on page 228. For information about using the Guest account, see Setting Up a Secure Guest Account, page 250.
Local Accounts and Groups vs. Domain Accounts and Groups
Windows stores information about user accounts and security groups in a security database. Where the security database resides depends on whether your computer is part of a workgroup or a domain. A workgroup setup (or a standalone computer) uses only local user accounts and local groups the type described in this chapter. The security database on each computer stores the local user accounts and local groups that are specific to that computer. Local user accounts allow users to log on only to the computer where you create the local account. Likewise, a local account allows users to access resources only on that same computer. (This doesn t mean that you can t share your resources with other network users, even if you re not part of a domain. For details, see 25, Managing Shared Folders and Printers. ) With such a setup, you avoid the initial expense of purchasing and configuring Microsoft Windows Server 2003 but because you must manage user accounts on each individual computer, this process becomes unwieldy with more than five or ten computers.
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