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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]
Password to open a document [56] Password to modify a document [57] Password to unprotect the worksheet; Password to protect workbook; Password to protect the sharing workbook [58] All passwords except password to open a document can be removed instantly regardless of the Microsoft Excel version used to create the document. These types of ...
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The purpose of password cracking might be to help a user recover a forgotten password (due to the fact that installing an entirely new password would involve System Administration privileges), to gain unauthorized access to a system, or to act as a preventive measure whereby system administrators check for easily crackable passwords. On a file ...
Change your password immediately. 2. Delete app passwords you don’t recognize. 3. Revert your mail settings if they were changed. 4. Ensure you have antivirus software installed and updated. 5. Check to make sure your recovery options are up-to-date. 6. Consider enabling two-step verification to add an extra layer of security to your account.
For a more secure password, you should avoid using obvious choices, such as names, locations, dates, phone numbers, birthdays, addresses, etc., since these are easy for hackers to guess. Tip #2 ...
The first public release of Crack was version 2.7a, which was posted to the Usenet newsgroups alt.sources and alt.security on 15 July 1991. Crack v3.2a+fcrypt, posted to comp.sources.misc on 23 August 1991, introduced an optimised version of the Unix crypt() function but was still only really a faster version of what was already available in other packages.
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