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Password recovery for WinZip and RAR files
BackgroundWinZip and PKZip archives use a proprietary encryption algorithm which has a long
keylength (making it impossible to use key recovery on a file). Whilst decryption
of all archives is not feasible, there are some weaknesses in the algorithm that
can be exploited.
If one of the files in the archive is available unencrypted, it is possible to
decrypt the archive without finding the password - this is called a plaintext
attack. In addition, if a WinZip archive contains more than 5 files, it can also
be unlocked without the password using a collision attack. The usual dictionary
and brute force approaches can sometimes be effective, as they typically run very
quickly for archive files and can therefore cover a larger number of passwords
in a given time.
Advanced Archive Password Recovery
This product is an extension of the Advanced Zip Password Recovery package. It
can unlock WinZip, PKZip, RAR and ARJ files, and offers several alternative approaches
to opening your file.
In addition to the usual brute force and dictionary attacks (this package is the
fastest in the world, and can try 15 million passwords per second on a 1 GHz Pentium
III), it also supports plaintext attacks. This software also offers guaranteed
decryption of WinZip files with 5 or more files. In our real world testing, we
have found this feature offers the best chance of recovering most archives without
needing to find the password. It is a valuable feature that is not found on competing
products.
Advanced Archive Password Recovery has the usual refined Elcomsoft interface and
has outstanding product support with lifetime upgrades to registered customers.
We recommend this as a complete archive recovery solution.
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