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Cipher.exe Security Tool for the Encrypting File System
Article ID: 298009 - View products that this article applies to.
This article was previously published under Q298009
Cipher.exe is a command-line tool (included with Windows 2000) that you can use to manage encrypted data by using the Encrypting File System (EFS). As of June 2001, Microsoft has developed an improved version of the Cipher.exe tool that provides the ability to permanently overwrite (or "wipe") all of the deleted data on a hard disk. This feature improves security by ensuring that even an attacker who gained complete physical control of a Windows 2000 computer would be unable to recover previously-deleted data.
IMPORTANT: Please note the following important information:
(http://support.microsoft.com/kb/260910/EN-US/ )How to Obtain the Latest Windows 2000 Service Pack
How to Obtain Cipher.exeCipher.exe is available in Windows 2000 Service Pack 3 or later or the Windows 2000 Security Rollup Package 1 (SRP1) or individually via the links below. For additional information on SRP1, click the article number below to view the article in the Microsoft Knowledge Base:
311401Q298009_W2K_SP3_x86_en.exe contains the following files:
(http://support.microsoft.com/kb/311401/EN-US/ )Windows 2000 Security Rollup Package 1 (SRP1), January 2002
Date Time Version Size Filename ------------------------------------------------------ May-30-2001 16:25 5.0.2195.3653 36,112 Cipher.exe May-26-2001 07:48 5.0.2195.3649 512,272 Ntfs.sys
How to Use Cipher.exeTo overwrite the deallocated data:
Article ID: 298009 - Last Review: February 21, 2007 - Revision: 7.5