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Some file systems, such as Btrfs, HAMMER, ReFS, and ZFS, use internal data and metadata checksumming to detect silent data corruption. In addition, if a corruption is detected and the file system uses integrated RAID mechanisms that provide data redundancy, such file systems can also reconstruct corrupted data in a transparent way. [18]
Recovery Toolbox for Excel repairs corrupted Microsoft Excel files while preserving most tabular data, styles, fonts, sheets, formulas, functions, cell colors, borders, etc. [18] [19] [20] Recovery Toolbox for Outlook repairs data from corrupted Microsoft Outlook 's PST and OST files, including emails, contacts, reminders, meetings, tasks ...
The ZFS file system was designed to address many of these data corruption issues. [22] The Btrfs file system also includes data protection and recovery mechanisms, [23] [better source needed] as does ReFS. [24]
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]
A file can become corrupted by a variety of ways: faulty storage media, errors in transmission, write errors during copying or moving, software bugs, and so on. Hash-based verification ensures that a file has not been corrupted by comparing the file's hash value to a previously calculated value. If these values match, the file is presumed to be ...
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For example, if an image-editing program unexpectedly crashes while saving an image, that file may be corrupted because the program could not save its entirety. The program itself might warn the user that there was an error, allowing for another attempt at saving the file. [11] Some other examples of reasons for which files become corrupted ...
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