 CRACK LOST PASSWORD
Anyone may once face the problem of a lost password. That is why information about
the password recovery methods is important.
Recovery Time
The time required to recover a lost password depends on the complexity of the algorithm
that was used to encrypt the password. The stronger algorithm is used, the more
complex is the procedure of generating a password, and the more time it takes to
crack lost password.
The majority of programs we regularly use have recently started employing rather strong
protection methods. This is connected with the rapid growth of the number of
hackers who try to get access to other people's private data. Still there are
exclusions to this rule and some programs (which rapidly fall into disuse) use
encryption schemes that are considered weak by today's standards and can be
cracked just in a few seconds. For example, the protection of documents in
Microsoft Word for Windows v.6 and 7 was so weak that under some circumstances
the passwords could be cracked in virtually no time at all. The situation has
changed with the release of Microsoft Office 97: cracking their passwords became
quite difficult (if you don't know the password's length and structure, it may
take you years to recover it). Microsoft Word offers even more: the user himself
can choose the encryption algorithm. This way, the user can decide how strong his
protection should be. But the main problem lies in the fact that not only hackers
attack passwords, sometimes the password owner needs to restore it too.
Password Recovery Methods
There are a variety of methods that can be used to retrieve data from the
password protected Word
or Excel documents. These methods even include full decryption of a document without
restoring the actual password. In other words, you can restore the data without
learning the password that was used to protect Word or Excel document. But we'll
discuss only the most primitive (but sure-fire) methods of restoring the original
password. Let us review three of these methods based on trying a series of
passwords for opening an encrypted document:
 Dictionary Attack
This method involves making password guesses based on a dictionary – a
special file containing the list of words (one word per line). The program tries
using each line as a password. This method of password recovery is quite fast
and effective. It often proves to be effective because people tend to choose
passwords that are easy to remember: words, names, predictable strings of
symbols and so on. But if your password is easy to remember, it is also easy
to guess. If you choose your pet's name as a password, be sure that your
password is already included in a hacker's dictionary.
Brute Force Attack
This is the most reliable but the slowest method to crack lost password. The effectiveness of this method fully depends on the computing power of your system. This method involves trying all possible passwords and it always requires sufficient time. But in many situations this is the only way to recover your password. If this is the case, your chances depend on how carefully you chose the password.
The "Brute Force With Mask" Attack
This variety of the brute force attack requires less time and computing resources. If you know some part of the password, you can include it in the password mask. The computer in this case will try to guess the unknown symbols only. The more symbols you will be able to remember, the less time it will take to restore your password.
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