How to unprotect Microsoft Excel workbooks/remove or restore password

In this video I'll show you a simple way of unprotecting Microsoft Office Excel workbooks or worksheets using a macro. The macro will find a 15-bit key able to unprotect or re-protect the workbook.

1:09 - Pastebin link for the code
http://pastebin.com/yeuXgYjx


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Closed Caption:

Have you ever wanted to modify an Excel
worksheet but it's protected with a password?
Well Microsoft Excel doesn't actually
store the password but a 15-bits key
is generated from each password instead.
In other words 2 raised to the power 15 (2^15)
which means there's only 32 768
total key possibilities to crack any
password. This means there are billions
of passwords to generate that same key.
These keys are "equivalent". You can
unprotect different passwords with the same key.
This method uses a macro with an
algorithm found easily on internet which
covers the 32 768 key possibilities.
It should crack a key within one minute
maximum.
First of all, make sure the developer tab
is displayed in the excel ribbon.
To do this go to the file tab then
choose "options".
Go to "customize ribbon" and select
"developer". Click ok and close the options dialog.
Click on the developer tab and then on
"Visual Basic"
select a worksheet or select the whole
workbook you want to hack then go to the
"Pastebin" link in the description.
Copy & paste all the code here
then click on macros in the developer
tab and select the macro just created
The generated key for the worksheet or
workbook should be found very quickly.
However it's impossible to find the
actual password but this should not
matter because all you want to do is
hack a worksheet to modify it
and you can use the same key to restore
the same protection.
Okay guys I hope you like this video,
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other videos!