the simplest password recovery, just select the Password Wizard
search method, specify the document file name and press 'Start'.
The Password Wizard will automatically guide you through
the basic recovery methods.
recovery using the Customized Search
a document owner, you can probably remember something about the
password, even if you have forgotten the entire password. Maybe
you know that the first half of the password was a common word and
the second half was a number.
You can configure the Customized
Search in the following manner (click
here to download the search template sample):
samples of Customized Search templates:
- Telephone number
- Internet URL
passwords are very secure and you can spend a lot of time
trying to find them. Fortunately, it is possible to decrypt the
document instead of performing the password search.
Office documents are internally encrypted using 40-bits key. When
you enter the password, Microsoft Office transforms your password
into 40-bits value (key) and then uses this value to decrypt the
we can test all the keys one by one, looking for the right one.
A modern PC (Pentium IV 3GHz) will test the whole range within 7-8
days. Because the
key can take any value from 0 to 1,099,511,627,775, we can say
that the average search time is 3-5 days, but
you can actually find key at any moment.
Ultimate ZIP Cracker supports multiprocessor mode for Guaranteed
So if you have several physical processor in your PC, the search
will be much faster.
Decryption and Office XP
with Office XP, Microsoft introduced a new encryption schema: Cryptographic
Service Providers encryption (CSP). Now you can choose the
encryption method for your document: Office 97/2000 compatible
encryption or CSP encryption.
For 97/2000 compatible encryption, you can still use the Guaranteed
Unfortunately, the Guaranteed
can't be used for CSP encryption. In fact, Microsoft is internally
using an analog of 160-bits key (20 bytes) for encryption,
regardless the key length specified in the document encryption
properties. Fortunately, the regular password recovery (password
search) is much faster for CSP.
Click here to download an evaluation copy of Ultimate ZIP Cracker.