Improved handling of warning when saving encrypted binary file formats in Office 2007

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Article ID: 968779 - View products that this article applies to.
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Symptoms

 When you save a document in the encrypted binary file format in a 2007 or 2010 Microsoft Office application, you receive the following message:

"This document is both encrypted and password protected. The Office Open XML Formats available in the 2007 release provide stronger encryption. Do you want to increase the security of this document by converting to an Office Open XML Format?"


If you click Yes on this message, you receive the message the next time that you save a document in the encrypted binary file format. Additionally, if you press CTRL+SHIFT+I, Alert ID 701726 is displayed in the lower-right corner of the message dialog box.

More information

You apply the 2007 Microsoft Office suite Service Pack 2 (SP2) or you have Microsoft Office 2010 installed. If you click No on the message that is mentioned in the "Symptoms" section, you no longer receive the message when you save a document in the encrypted binary file format. This sets the value of the NoPromptForRC4Encryption registry key to 1. In earlier versions of the 2007 Office suite SP2, you had to set the value manually. The registry key is located under the following registry subkey:
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Common\Security
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
322756 How to back up and restore the registry in Windows
To bring the prompt back, you can change the value of the NoPromptForRC4Encryption registry key to 0 or delete the registry key. To do this, follow these steps:

Microsoft Office 2007:
  1. Click Start, click Run, type regedit in the Open box, and then click OK.
  2. Locate and then click the following registry subkey:
    HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Common\Security\
  3. Right-click NoPromptForRC4Encryption, and then use one of the following steps:
    • Click Modify, in the Value data box, type 0, and then click OK.
    • Click Delete, and then click Yes.
  4. Exit Registry Editor.

Microsoft Office 2010:
  1. Click Start, click Run, type regedit in the Open box, and then click OK.
  2. Locate and then click the following registry subkey:
    HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Common\Security\
  3. Right-click NoPromptForRC4Encryption, and then use one of the following steps:
    • Click Modify, in the Value data box, type 0, and then click OK.
    • Click Delete, and then click Yes.
  4. Exit Registry Editor.


The term "binary file format" refers to the previous file formats that are used in Word, Excel, and PowerPoint.

Binary file format extensions:
  • Excel 97-2003 Workbook (*.xls)
  • Excel 97-2003 Template (*.xlt)
  • PowerPoint 97-2003 Presentation (*.ppt)
  • PowerPoint 97-2003 Template (*.pot)
  • Word 97-2003 Document (*.doc)
  • Word 97-2003 Template (*.dot)
The term "open XML format" refers to the new formats in Word 2007, Excel 2007, and PowerPoint 2007.

Open XML format extensions:
  • Excel 2007 (*.xlsx)
  • Excel 2010 (*.xlsx)
  • Excel 2007 XML template (*.xltx)
  • Excel 2010 XML template (*.xltx)
  • PowerPoint 2007 (*.pptx)
  • PowerPoint 2010 (*.pptx)
  • PowerPoint 2007 XML template (*.potx)
  • PowerPoint 2010 XML tempalte (*.ptox)
  • Word 2007 (*.docx)
  • Word 2010 (*.docx)
  • Word 2007 XML template (*.dotx)
  • Word 2010 XML Template (*dotx)

Steps to reproduce the problem in Microsoft PowerPoint 2007.

  1. Make sure that the NoPromptForRC4Encryption registry key does not exist under the following registry subkey:
    HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Common\Security
    If it exists, delete it or change its value to 0.
  2. Start PowerPoint 2007, click the Microsoft Office Button
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    Microsoft Office Button
    , point to Save As, and then click PowerPoint 97-2003 Presentation.
  3. Select a path for the document, type a name in the File name box, and then click Save.
  4. Click the Microsoft Office Button
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    Microsoft Office Button
    , point to Prepare, and then click Encrypt Document.
  5. In the Encrypt Document dialog box, in the Password box, type a password, and then click OK.
  6. In the Confirm Password dialog box, type the password again in the Re-enter password box, and then click OK.
  7. Click the Microsoft Office Button
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    Microsoft Office Button
    , and then click Save.
Note You can also encrypt the document. To do this, follow these steps:
  1. Click the Microsoft Office Button
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    Microsoft Office Button
    , and then click Save As.
  2. At the bottom of the Save As dialog box, click Tools, and then click General Options.
  3. Under File encryption options for this document, type a password in the Password to open box, and then click OK.
  4. In the Confirm Password dialog box, type the password again in the Re-enter password box, and then click OK.
  5. Click the Microsoft Office Button
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    Microsoft Office Button
    , and then click Save.
For more information about how to encrypt a document, visit the following Microsoft Web site:
http://office.microsoft.com/en-us/word/HA102267981033.aspx

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Properties

Article ID: 968779 - Last Review: May 23, 2014 - Revision: 5.0
Applies to
  • 2007 Microsoft Office Suite Service Pack 2, when used with:
    • Microsoft Office Excel 2007
    • Microsoft Office PowerPoint 2007
    • Microsoft Office Word 2007
  • Microsoft Word 2010
  • Microsoft Excel 2010
  • Microsoft PowerPoint 2010
Keywords: 
kbexpertiseinter kbsurveynew kbprb KB968779

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