
= Contents =

  System requirements
  Overview
  Registration
  Known bugs and limitations
  Contact information


= System requirements =

- Windows 95, Windows 98, Windows ME, Windows NT 4.0, Windows 2000 or Windows XP
- about 4 megabytes of free memory (for known plaintext attack - about 34 megabytes)
- less than 1 megabyte of free space on hard disk


= Overview =

This program (Advanced ZIP Password Recovery, or simply AZPR) can be used to recover the lost password for a ZIP archive. At the moment, there is no known method to extract the password from the compressed file, so the only available methods are "brute force", dictionary-based and known-plaintext attacks.

Well, there are a lot of programs like this around, but all of them have their own "pros" and "cons". Here is a brief list of AZPR's advantages:

- The program has a convenient user interface
- The program is very fast: up to fifteen million passwords per   second (on Pentium III)
- The program can work with archives containing only one encrypted file (at about the same speed)
- Self-extracting archives are supported
- The program is customizable: you can set the password length (or length range), the character set to be used to generate the passwords, and a couple of other options
- You can select the custom character set for brute-force attack (non-English characters are supported)
- Dictionary-based attack is available
- The "brute-force with mask" attack is available
- Very fast known-plaintext attack is available
- No special virtual memory requirements
- You can interrupt the program at any time, and start from the same point later
- The program can work in the background, using the CPU only when it is in idle state


= Known bugs and limitations =

- If the archive contains only one encrypted fileand it is "stored" (without compression, just with encryption) -- the performance might be lower than expected, especially on large files, because decrypting the whole file is required.
- If the archive contains two or more encrypted files, the program assumes that all of them are encrypted with the same password.


= Contact information =

Please send your suggestions and bug reports to support@elcomsoft.com (don't forget to mention what version of AZPR you're using). The most current version of AZPR is always available at:

http://www.elcomsoft.com/azpr.html

Also, have a look at our Advanced Archive Password Recovery (ARCHPR) software, which works not only with ZIP archives, but also with ARJ, RAR (2.0-2.8) and ACE (1.x), so accumulates all the features of Advanced ZIP Password recovery, Advanced ARJ Password Recovery, Advanced RAR Password Recovery and Advanced ACE Password Recovery. Besides, ARCHPR supports Guaranteed WinZip recovery, not available in AZPR:

http://www.elcomsoft.com/archpr.html

Other password recovery products (for Microsoft Office and other Microsoft applications: Word, Excel, Access, PowerPoint, Outlook, Outlook Express, Internet Explorer, Visio, VBA, MS Backup, MS Project, MS Mail, MS Schedule+; Lotus Organizer, Lotus 1-2-3, Lotus WordPro, Lotus Approach; Corel WordPerfect, Paradox and QuattroPro; ACT!; Intuit Quicken and QuickBooks; Adobe Acrobat PDF; most popular email clients and instant messengers) are available at:

http://www.elcomsoft.com/prs.html
