
= 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 space on hard disk


= Overview =

This program (Advanced RAR Password Recovery, or simply ARPR) can be used to recover the lost password for RAR archives. 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. Here is a brief list of ARPR's advantages:

- The program has a convenient user interface
- The program can work with archives containing only one encrypted file
- 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
- 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 file and 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.
- For RAR archives created in versions 2.9 and 3.x, the recovery speed is extremely low (due to very strong encryption).


= Contact information =

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

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

Also, have a look at our Advanced Archive Password Recovery (ARCHPR) software, which works not only with RAR archives, but also with ARJ, ZIP and ACE (1.x):

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; Windows 2000/XP Encrypting File System on NTFS; Windows NT/2000/XP user passwords) are available at:

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