![]() ![]() ![]() Understanding How To Control Your Password Protection Strength The below XML code was inside a workbook where I used the password "SpreadsheetGuru" to protect a blank worksheet. A Hash is the output from a Hash Algorithm (complicated mathematical equation) that turns any user-generated password into a jumbled-up string of (appearingly) meaningless characters. Here's a fun fact: Excel does not actually store the password you input! Like most password protection software out there, the Excel Application stores a string of data called a Hash. I won't go into detail on where to find the password information however I will show you an example of how the code is written in both Excel 2007-2010 and in the more secure Excel 2013 version. Likewise, if you understand how these zipped files are written and organized, you can determine settings, data, and even password information made by the user who created the Excel file. ![]() Magically your Excel file is transformed into a bunch of files with lots and lots of computer (OpenXML) code! This is important to know as this is where you can dig into how an Excel file is made up. Don't believe me? Go to one of your Excel files on your computer and change its extension from. Many don't know this, but every individual Excel file is really a. ![]()
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