Windows Vista includes a file encryption technology very similar from a user perspectiveto the one that existed in Windows XP, but Vista makes it very easy to make a backup of the file encryption key. In XP, your encrypted files would be lost if you changed your password. In Vista, an encryption key is used to sign the encrypted files, which also means it can be backed up.

從使用者的角度來看，Windows Vista包含一種檔案加密技術，與Windows XP中存在的技術非常相似，但是Vista使得備份檔案加密金鑰非常容易。 在XP中，如果更改密碼，加密的檔案將丟失。 在Vista中，使用加密金鑰對加密的檔案進行簽名，這也意味著可以對其進行備份。

It’s critically important that you make a backup of your encryption key if you decide to use the encryption features. Thankfully Vista reminds you immediately after the first time you encrypt a file.

如果決定使用加密功能，則備份加密金鑰至關重要。 幸運的是，Vista會在您第一次加密檔案後立即提醒您。

To use the Wizard to back up the encryption key, just click on the popup notification when it comes up.

要使用嚮導備份加密金鑰，只需在彈出通知出現時單擊它。

Select “Back up now” from the wizard screen.

從嚮導螢幕中選擇“立即備份”。

Hit next…

下一個…

You may as well select all the possible information to back up, in case you have multiple keys for some reason.

如果出於某種原因有多個鍵，則最好選擇所有可能的資訊進行備份。

You’ll have to enter a password for the key. This password will be used if you try and restore the encryption key later. Make sure you choose a good password, and make sure that it’s also something you’ll remember. This is where a password safe application might help.

您必須輸入金鑰的密碼。 如果您稍後嘗試恢復加密金鑰，將使用此密碼。 確保您選擇了正確的密碼，並且還記得該密碼。 這是密碼安全應用程式可能會提供幫助的地方。

On the next screen, you can enter a filename, or you can click the Browse button and choose a folder location.(It was easier for me to click Browse)Type in the file name that you want here.

在下一個螢幕上，您可以輸入檔名，也可以單擊“瀏覽”按鈕並選擇資料夾位置。 (對我來說，單擊瀏覽比較容易)在此處鍵入所需的檔名。

Hit next and then finish, and you should see that the export was succesful.

單擊“下一步”，然後完成操作，您應該看到匯出成功。

Now it’s very important to back that file up to somewhere safe. A spare USB drive wouldn’t be a bad idea.

現在將檔案備份到安全的位置非常重要。 備用USB驅動器不是一個壞主意。

Note: If you selected “Never Back Up”, or you just don’t see the popup notification, don’t fear, you can still back up the encryption key. Just open up Control Panel, and type in “certificate” (or the first few letters, as you can see below)

注意：如果選擇“從不備份”，或者只是看不到彈出通知，請放心，您仍然可以備份加密金鑰。 只需開啟控制面板，然後輸入“ certificate”(證書)(或前幾個字母，如下所示)

Click on “Manage file encryption certificates” and then hit next on the resulting dialog window.

單擊“管理檔案加密證書”，然後在出現的對話方塊視窗中單擊下一步。

You should see a very simple screen that makes it easy to back up the encryption key in a single step. Honestly, I think this route is faster than using the other wizard, and it bugs me that they made two different screens to accomplish the same thing.

您應該看到一個非常簡單的螢幕，使您可以輕鬆地一步備份加密金鑰。 坦率地說，我認為這條路線比使用其他嚮導要快，這讓我很困惑，他們製作了兩個不同的螢幕來完成同一件事。

Same as before, select a filename and password (Use the browse button to select the filename more easily)

與以前一樣，選擇檔名和密碼(使用瀏覽按鈕更輕鬆地選擇檔名)

Check the box for “I’ll update my encrypted files later”, because you aren’t actually changing the certificate at this point, just backing it up.

選中“我稍後再更新我的加密檔案”複選框，因為此時您實際上並沒有更改證書，只需備份它即可。

…make sure that you back up the key file safely.

…確保安全備份金鑰檔案。

翻譯自: https://www.howtogeek.com/howto/windows-vista/back-up-your-file-encryption-key-in-windows-vista/