Yesterday I heard the neighbor's Xiao Wang's notebook dropped, and thousands of books were gone. Even more troublesome is that there are a lot of personal information inside: photos, important account information, etc., if you fall into the hands of people is always frightening.
In fact, the Windows operating system already has encryption mechanism to help you put together an encrypted file, even let people take the hard drive would not be able to get the data inside.
Easy Collection Tip:
some users say, "I have set the folder permissions, and others can not access." In fact, the permissions are only system-level restrictions, and can not prevent access to the file itself, the hard disk can be read on other computers.
Here we use Windows XP Professional version, for example, look at specifically how to operate, what can be noted.
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Windows 2000, Windows XP, Windows Vista system used in encryption is called "file encryption system", it is limited to the NTFS file system. In addition, not all operating system versions support this feature. For example, Windows XP Professional supports file system encryption, which is not supported in Windows XP Home.
to see how I use the kind of file system?
Right Point Drive -> Properties -> General Tab.
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we see here is the file system is NTFS, if the display is FAT32, not NTFS file system description.
If it is not NTFS system how to do?
You can convert the file system to NTFS. (But remember, you can't turn back when you turn around.) - Start -> Run -> Enter cmd -> Enter.
- For example, if you want to convert the C drive, just hit this command and press Enter: convert C: /fs:ntfs put away the picture and expand the picture
- Generally wait for two minutes.
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we can select the entire folder->right click it->select properties-> general tab-> Advanced -> Encrypt the content to protect the data.
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we will find an encrypted file or folder, by default, it is displayed with green characters.
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any convenient thing improper use of the inconvenience. The security door can prevent thieves and lock yourself out. If the system is reinstalled, the encrypted file cannot be opened (this is where the encryption works). Moreover, there is no way to recover a file that cannot be opened. Because the file used for encryption is opened with a "key", after reinstalling the machine, the key is gone.
so we need when the system is not normal reload, put the key back out.
Backup:
Now that the machine is working properly, we will first back up the "key" so that it can be used from time to time. - Open Internet Explorer Browser -> -> Properties on the Tools menu. Then the Internet option is turned on.
- Click the Content tab and press Certificate in the middle.
Close this picture to expand this picture - You need to use the key to encrypt and decrypt the file. This key is the certificate. A certificate will appear on your personal tab, which is your username. Select it and you can see that the "intended purpose of the certificate" is "Encrypted File System" and then press Export.
Close this picture to expand this picture - The following steps are relatively simple, first pop up a box, press Next.
- will ask you "Do you want to export the private key certificate together?" Select "Yes, export private key" and press Next.
- This page does not need to be changed, the default option is OK, press Next.
- When you are prompted to set a password, remember that this password is what you need to use the next time you import it. You can set a simple point, because the backup you export can be strictly kept. The next step after completion.
- Set the location of the exported file, export the certificate to a file, and select the save location.
Close this picture and expand this picture - This is done. The exported file is in .pfx format and you need to keep it safe. Can be copied to your own personal USB flash drive. Conveniently engraved on a CD (although a bit wasteful).
Restore:
Assuming you reinstall the system now, you need to take out the previously backed up. You can do this: - The .pfx file that you saved before is now taken out.
- Just double-click on this file and the import will start. Press Next.
- Enter the password you have previously set, and the second box should be checked: Mark this key as exportable. This will allow you to back up or transfer the key later.
Close this picture to expand the picture - on the certificate storage page, do not need to change things, leave the default options. Press Next.
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Small reminder:
This method only needs to encrypt important personal information files. General files, such as program files, do not require encryption. Also don't encrypt the entire drive letter. Because encryption itself affects file read speed, because reading a file is a process of decryption.