Civil Engineering Association

Advanced Zip Password Rec0very (or simply @ZPR) is a program recover (break) lost or forgotten passwords for a ZIP/PKZip/WinZip archives. Unfortunately, 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 @ZPR's advantages:

-- The program has a convenient user interface
-- The program is very fast: brute-force attack speed is up to fifteen million passwords per second on modern CPUs like Pentium 4 (Prescott)
-- Very fast and effective known plaintext attack is available
-- 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 lot 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 resume from the same point later
-- The program can work in the background, using the CPU only when it is in idle state

Version 4.0 has improved user interface, digitally-signed setup program, and has much faster brute-force attacks (the improvement is 10%-15% on AMD Athlon, PII/PIII and P4 Prescott, and up to 45% on P4 Northwood).