When you use the Encrypting File System (EFS) to encrypt files, some files are not fully encrypted in Windows Vista or in Windows Server 2008

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Article ID: 963046 - View products that this article applies to.
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SYMPTOMS

Assume that you use the Encrypting File System (EFS) to encrypt files in Windows Vista or in Windows Server 2008. After the encryption process is complete, you can retrieve the EFS0.tmp temporary file by using a file restoration tool. This file is in clear text format and is not encrypted.

CAUSE

When EFS encrypts a file, EFS creates a backup copy of the file, and this file is named EFS0.tmp. EFS does this to prevent accidental data loss during the file encryption process. After the encryption process is complete, the backup copy is deleted. However, because file deletion does not zero out the data in storage, you may retrieve the encrypted data in plain text format by using certain file restoration tools.

RESOLUTION

Hotfix information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Important Windows Vista and Windows Server 2008 hotfixes are included in the same packages. However, only one of these products may be listed on the “Hotfix Request” page. To request the hotfix package that applies to both Windows Vista and Windows Server 2008, just select the product that is listed on the page.

Prerequisites

To apply this hotfix, you must have Windows Vista Service Pack 1 or Windows Server 2008 installed.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other previously released hotfixes.

Registry information

To use this hotfix, you do not have to make any changes to the registry.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Vista and Windows Server 2008 file information note

The MANIFEST files (.manifest) and the MUM files (.mum) that are installed for each environment are listed separately. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.
For all supported x86-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ksecdd.sys6.0.6001.22202441,40030-Jan-200900:29x86
Lsasrv.dll6.0.6001.223681,256,96004-Feb-200905:28x86
Lsasrv.mofNot Applicable13,78018-Dec-200721:23Not Applicable
Lsass.exe6.0.6001.223689,72804-Feb-200905:28x86
Secur32.dll6.0.6001.2236872,70404-Feb-200905:28x86
For all supported x64-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ksecdd.sys6.0.6001.22202516,15230-Jan-200900:29x64
Lsasrv.dll6.0.6001.223681,693,69604-Feb-200906:08x64
Lsasrv.mofNot Applicable13,78018-Dec-200721:23Not Applicable
Lsass.exe6.0.6001.2236811,26404-Feb-200906:02x64
Secur32.dll6.0.6001.2236894,20804-Feb-200906:09x64
Lsasrv.mofNot Applicable13,78018-Dec-200721:23Not Applicable
Secur32.dll6.0.6001.2236876,80004-Feb-200905:27x86
For all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameFile versionFile sizeDateTimePlatform
Ksecdd.sys6.0.6001.222071,025,59229-Jan-200923:29IA-64
Lsasrv.dll6.0.6001.223683,245,56804-Feb-200904:41IA-64
Lsasrv.mofNot Applicable13,78018-Dec-200721:23Not Applicable
Lsass.exe6.0.6001.2236817,92004-Feb-200904:39IA-64
Secur32.dll6.0.6001.22368202,75204-Feb-200904:41IA-64
Lsasrv.mofNot Applicable13,78018-Dec-200721:23Not Applicable
Secur32.dll6.0.6001.2236876,80004-Feb-200905:27x86

WORKAROUND

To work around this problem, use the Cipher utility to prevent any unauthorized data recovery.

For more information, click the following article number to view the article in the Microsoft Knowledge Base:
814599 How to use Cipher.exe to overwrite deleted data in Windows Server 2003

STATUS

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

MORE INFORMATION

For more information about EFS, visit the following Microsoft Web site:
http://technet.microsoft.com/en-us/library/cc700811.aspx
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates

Additional file information for Windows Vista and for Windows Server 2008

Additional files for all supported x86-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File namePackage_for_kb963046_client_1~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,367
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_client~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_sc_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,421
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_sc~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,423
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_server_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_server~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_winpesrv_0~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,422
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_winpesrv~31bf3856ad364e35~x86~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)04-Feb-2009
Time (UTC)23:19
File nameX86_b7578aea6fa02abaec076060b61ff82d_31bf3856ad364e35_6.0.6001.22368_none_4f2191524137be90.manifest
File versionNot Applicable
File size691
Date (UTC)04-Feb-2009
Time (UTC)23:19
File nameX86_microsoft-windows-lsa_31bf3856ad364e35_6.0.6001.22368_none_a69b4e21761244ac.manifest
File versionNot Applicable
File size34,373
Date (UTC)04-Feb-2009
Time (UTC)07:09
Additional files for all supported x64-based versions of Windows Vista and of Windows Server 2008
Collapse this tableExpand this table
File nameAmd64_5b266188de718372ed513f16a387c5dc_31bf3856ad364e35_6.0.6001.22368_none_8683f80f1a576351.manifest
File versionNot Applicable
File size695
Date (UTC)04-Feb-2009
Time (UTC)23:19
File nameAmd64_68283f03523ed7a8ce076a9646896940_31bf3856ad364e35_6.0.6001.22368_none_031d076950999cab.manifest
File versionNot Applicable
File size1,032
Date (UTC)04-Feb-2009
Time (UTC)23:19
File nameAmd64_microsoft-windows-lsa_31bf3856ad364e35_6.0.6001.22368_none_02b9e9a52e6fb5e2.manifest
File versionNot Applicable
File size34,461
Date (UTC)04-Feb-2009
Time (UTC)07:40
File namePackage_1_for_kb963046~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,781
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_2_for_kb963046~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size2,161
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_3_for_kb963046~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,997
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_4_for_kb963046~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,997
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_client_1~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,375
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_client~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,439
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_sc_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_sc~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,431
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_server_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,433
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_server~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,439
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_winpesrv_0~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,430
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_winpesrv~31bf3856ad364e35~amd64~~6.0.1.0.mum
File versionNot Applicable
File size1,437
Date (UTC)04-Feb-2009
Time (UTC)23:19
File nameWow64_microsoft-windows-lsa_31bf3856ad364e35_6.0.6001.22368_none_0d0e93f762d077dd.manifest
File versionNot Applicable
File size21,959
Date (UTC)04-Feb-2009
Time (UTC)06:33
Additional files for all supported Itanium-based versions of Windows Server 2008
Collapse this tableExpand this table
File nameIa64_90c66b56cf0cc8e398fd80504da8d7d9_31bf3856ad364e35_6.0.6001.22368_none_e4a71a9c7e37bebc.manifest
File versionNot Applicable
File size693
Date (UTC)04-Feb-2009
Time (UTC)23:19
File nameIa64_db632b9a297fb5317505f8e8e29bd771_31bf3856ad364e35_6.0.6001.22368_none_12e2403e6c092a4e.manifest
File versionNot Applicable
File size1,030
Date (UTC)04-Feb-2009
Time (UTC)23:19
File nameIa64_microsoft-windows-lsa_31bf3856ad364e35_6.0.6001.22368_none_a69cf21776104da8.manifest
File versionNot Applicable
File size34,398
Date (UTC)04-Feb-2009
Time (UTC)05:20
File namePackage_for_kb963046_sc_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,425
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_sc~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,426
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_server_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,429
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_server~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,434
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_winpesrv_0~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,426
Date (UTC)04-Feb-2009
Time (UTC)23:19
File namePackage_for_kb963046_winpesrv~31bf3856ad364e35~ia64~~6.0.1.0.mum
File versionNot Applicable
File size1,433
Date (UTC)04-Feb-2009
Time (UTC)23:19
File nameWow64_microsoft-windows-lsa_31bf3856ad364e35_6.0.6001.22368_none_0d0e93f762d077dd.manifest
File versionNot Applicable
File size21,959
Date (UTC)04-Feb-2009
Time (UTC)06:33

Properties

Article ID: 963046 - Last Review: October 7, 2011 - Revision: 2.0
APPLIES TO
  • Windows Server 2008 Datacenter without Hyper-V
  • Windows Server 2008 Enterprise without Hyper-V
  • Windows Server 2008 Standard without Hyper-V
  • Windows Server 2008 Datacenter
  • Windows Server 2008 Enterprise
  • Windows Server 2008 Standard
  • Windows Vista Enterprise 64-bit Edition
  • Windows Vista Home Basic 64-bit Edition
  • Windows Vista Home Premium 64-bit Edition
  • Windows Vista Ultimate 64-bit Edition
  • Windows Vista Business
  • Windows Vista Business 64-bit Edition
  • Windows Vista Enterprise
  • Windows Vista Home Basic
  • Windows Vista Home Premium
  • Windows Vista Ultimate
Keywords: 
kbautohotfix kbexpertisebeginner kbfix kbsurveynew kbqfe KB963046

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