After the copy is finished, we can change the existing permissions. If the existing permissions are completely wrong, we could just remove them and build our own permissions from scratch. Notice that we have the same permissions list as we had before. But this time we can edit the permissions. Otherwise the permissions will be inherited from the parent.
When we add new user or group to the ACL, we can assign the permissions for that user or group of users as we desire. Our users can belong to more than one group, so this option comes in handy in that case. In this case we will add the privileges up. We have to select the user or a group. The effective permissions will appear for that user or a group of users. In other words, we are going to modify the NTFS permissions. Notice that each of the entries have inherited the permissions from the parent drive.
We want to have more restricted permissions, so we need to modify the inherited permissions. Click OK to close the advanced dialog box. Now we can modify our existing permissions. In other words, they could change permissions on this folder. Every folder and file has several permissions that we can set to control access. EFS uses public key security to encrypt files on an NTFS volume, preventing unauthorized users from accessing those files. Encryption ensures that only the authorized users and designated recovery agents of that file or folder can access it.
Users of EFS are issued a digital certificate with a public key and a private key pair. EFS uses the key set for the user who is logged on to the local computer where the private key is stored. Users work with encrypted files and folders just as they do with any other files and folders.
Encryption is transparent to any authorized users; the system decrypts the file or folder when the user opens it. When the file is saved, encryption is reapplied. However, intruders who try to access the encrypted files or folders receive an "Access denied" message if they try to open, copy, move, or rename the encrypted file or folder.
Note II: It is recommended that you encrypt at the folder level to ensure that new files are automatically encrypted and that temporary files created during the editing process remain encrypted. Another advantage to NTFS is native support for file compression. The NTFS compression offers you the opportunity to compress individual files and folders of your choice. Because compression is implemented within NTFS, any Windows-based program can read and write compressed files; there is no need to manually "uncompress" the file s first.
Disk quotas allow administrators to manage the amount of disk space allotted to individual users, charging users only for the files they own. Most users begin sharing files with workgroups, or peer-to-peer networks, by following these steps:. However, that method won't always work as you intend, especially on Windows XP systems formatted with NTFS in which conflicting NTFS permissions can prevent an intended user from accessing those resources -- more on that in a moment.
Worse, Windows XP's default share permissions behavior is set to provide Everyone with access to the share's contents. It's also important to note that Windows XP's Simple File Sharing, enabled by default, must be turned off to specify different permissions for different users. To turn off Simple File Sharing:. To remove the Everyone permissions, and specify varying access permissions different users should receive to a file share:. The Full Control permission enables a user or group to read, write, delete and execute files within the folder.
Users possessing Full Control permission can also create and delete new folders within the share. The Change permission enables a user or group to read and change files within the folder and create new files and folders within the shared folder. Users with Change permission can also execute programs within the folder.
The Read permission, meanwhile, enables a user or group to read files within the share and execute programs located within the folder. The next section reviews configuring NTFS permissions. Windows NTFS permissions provide a host of additional permissions options. In addition, NTFS permissions can be applied to a single file or folder.
Using the convert command, you can upgrade a drive to NTFS without losing its data. However, it's always best to confirm you have a working backup on hand before executing the command.
Note that, by default, subfolders will inherit permissions from parent folders. To customize permissions inheritance, click the Advanced button found on the share or filename's Properties dialog box. To determine a user's ultimate resulting permissions, add all the NTFS permissions granted to a user directly and as a result of group membership, then subtract those permissions denied directly and as a result of group membership.
For example, if a user is explicitly granted Full Control but is also a member of a Group in which Full Control is denied, the user will not receive Full Control rights. For this reason, administrators should carefully apply Deny permissions, as the Deny attribute overrules any equivalent instances of Allow when the two rights are applied to the same user or group.
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