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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]
Accept documents submitted in XML formats: ODF format as like OOxml format (both are in "Observations") Use PDF/A to preserve text documents; Government agencies are encouraged to: Install OpenOffice.org (an open-source, ODF-based productivity suite) [citation needed] Use ODF to create text documents, spreadsheets, and slideshow-style presentations
Each sub-document within a package has a different document root and stores a particular aspect of the XML document. All types of documents (e.g. text and spreadsheet documents) use the same set of document and sub-document definitions. As a single XML document – also known as Flat XML or Uncompressed XML Files.
The standard security provided by PDF consists of two different methods and two different passwords: a user password, which encrypts the file and prevents opening, and an owner password, which specifies operations that should be restricted even when the document is decrypted, which can include modifying, printing, or copying text and graphics ...
The Open Packaging Conventions (OPC), for the package model and physical package, is defined and used by various document types in various applications from multiple vendors. It defines core properties, thumbnails, digital signatures, and authorizations & encryption capabilities for parts or all of the contents in the package.
In most cases, the address for a secure website will start with "https." The "s" indicates that the site is secure. In addition, most browsers display a small picture of a lock on the browser frame at the bottom to indicate that the site is secure; however, just having both these features doesn't make a site legitimate.
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