My problem is to decrypt my data

I encrypt my files using the encryption provided by properties Win Vista system, I make a backup copy of these files in my USB and reinstall my windows without saving my key certificates.
 
Now, I can not access these files due to permission ristriction, I tired to change the owner of the file, but it does not work.
 
I need to sort my sort this problem.

http://en.Wikipedia.org/wiki/encryption

You need this certificate/key to enter.

http://Windows.Microsoft.com/en-us/Windows-Vista/what-is-encrypting-file-system-EFS

What is EFS (ENCRYPTING File System)?

EFS (ENCRYPTING File System) is a Windows feature that allows you to store information on your hard disk in an encrypted format. Encryption is the best protection that Windows provides to help you keep your information secure.

Some key features of the EFS:

  • Encryption is simple; Just select a check box in the file or the folder properties to turn it on.

  • You can control who can read the files.

  • Files are encrypted when you close them, but are automatically ready to use when you open them.

  • If you change your idea of having an encrypted file, clear the check box in the properties of the file.

EFS don't is not fully supported on Windows Vista Starter, Windows Vista Home Basic Edition and Windows Vista Home Premium. For those editions of Windows, if you have the encryption key or certificate, you can proceed as follows:

  • Decrypt files by running Cipher.exe in the window prompt (advanced users)

  • Modify an encrypted file

  • Copy an encrypted file as decrypted on a hard disk on your computer

  • Import the key and EFS certificates

  • Back up EFS certificates and keys by running Cipher.exe in the window prompt (advanced users)

http://Windows.Microsoft.com/en-us/Windows-Vista/what-is-encryption

Encryption is a way to enhance the security of a message or file by scrambling the contents so that it can be read only by someone who has the appropriate encryption key to decrypt it. For example, if you buy something on the Internet, the transaction information (for example, your address, telephone number, and credit card number) is usually encrypted to keep them safe. Use encryption when you want a high level of protection for your information.

See you soon. Mick Murphy - Microsoft partner

Tags: Windows

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