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In Excel and Word 95 and prior editions a weak protection algorithm is used that converts a password to a 16-bit verifier and a 16-byte XOR obfuscation array [1] key. [4] Hacking software is now readily available to find a 16-byte key and decrypt the password-protected document. [5] Office 97, 2000, XP and 2003 use RC4 with 40 bits. [4]
Microsoft Word 2003/Word 11 2003 10/2003– Word 2003 RTF Specification [4] 1.9.1 19. March 2008 (RTF 1.9 – published in January 2007) [28] Microsoft Word 2007/Word 12 2006 Allowed XML markup – Custom XML Tags, SmartTags, Math elements in an RTF document, password protection, elements corresponding to Office Open XML Ecma-376 Part 4 [29]
Three password types can be set in Microsoft Word: Password to open a document [82] Password to modify a document [82] Password restricting formatting and editing [83] The second and third password types were developed by Microsoft for convenient shared use of documents rather than for their protection.
Cryptographic service providers can be used for encryption of Word, Excel, and PowerPoint documents starting from Microsoft Office XP.A standard encryption algorithm with a 40-bit key is used by default, but enabling a CSP enhances key length and thus makes decryption process more continuous.
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Microsoft Office 2007 SP2 does not support reading and writing encrypted (password protected) ODF files. [58] [59] [60] Users are presented with a message: “cannot use password protection using the ODF format.” [58] [60] The ISO/IEC 26300 OpenDocument standard has no spreadsheet formula language included (or referenced) in the standard ...
For example, word processing programs like Microsoft Word will sometimes be used to edit out the sensitive information. These products do not always show the user all of the information stored in a file, so it is possible that a file may still contain sensitive information.
Protected View, an isolated sandbox environment for Excel, PowerPoint, and Word, replaces the Isolated Conversion Environment update available for previous versions of Microsoft Office. When a document is opened from a potentially unsafe location such as the Internet or as an e-mail attachment, or if a document does not comply with File Block ...
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