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Excel Services supports workbooks that are connected to external data sources. Users can embed connection strings to external data sources in the workbook or save them centrally in a data connection library file. Selected cells in worksheets can be made editable by making them named ranges or "parameters".
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]
LibreOffice is able to open and save Office Open XML files. [45] Apache OpenOffice from version 3.0 can import Office Open XML files but not save them. [46] Version 3.2 improved this feature with read support even for password-protected Office Open XML files. [47] [48] [49] The Go-oo fork of OpenOffice could also write OOXML files.
Word, Excel, and PowerPoint on the web can all natively open, edit, and save Office Open XML files (docx, xlsx, pptx) as well as OpenDocument files (odt, ods, odp). They can also open the older Office file formats (doc, xls, ppt), but will be converted to the newer Open XML formats if the user wishes to edit them online. Other formats cannot be ...
Microsoft Office Open XML Converter for Mac OS X can convert Office Open XML files to the former binary file formats used in older versions of Microsoft Office. [33] OxygenOffice includes xmlfilter which is the code that OpenOffice.org 3 will use to process Office Open XML files, and xmlfilter is completely different from OdfConverter. [65]
Online or offline editing of all Microsoft Office 2007 documents via a SharePoint site. All edits are automatically synchronized. Contacts can be shared among users, via e-mail, Exchange Server or a SharePoint site. Attachment preview allows users to view Office e-mail attachments in the reading pane rather than having to open another program. [73]
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Due to the CSP, an Excel file cannot be decrypted, and thus the password to open cannot be removed, though the brute-force attack speed remains quite high. Nevertheless, the older Excel 97/2000 algorithm is set by the default. Therefore, users who do not change the default settings lack reliable protection of their documents.