Zip Key

Zip Key is a program to recover passwords for ZIP archives created with WinZip, PKZip or any other ZIP-compatible software.

Features

All versions of WinZip and PKZip are supported
New Zip Key decrypts most of WinZip archives in less than an hour with our new SureZip™ Recovery
Fast password recovery engine - up to 5,000,000 passwords checked per second on an average P-IV system
Brute-Force, Xieve™, SureZip™, Known Plaintext or Dictionary attacks are used to recover the password
Advanced 128-bit and 256-bit AES Encryption is supported
Additional user dictionaries support, case changes, multiple mistypes and other modifications for each dictionary word
Program automatically saves password search state and can resume after a stop or a crash
Patterns can be used to minimize search time if any part of the password is known
Non-English characters in passwords are supported
Self-Extracting Zip Files (SFX) are supported
Full install/uninstall support

Passware developed Xieve™ optimization, which dramatically boosts Brute-Force attack speed by skipping password checks of nonsense combinations of characters. With 95% recovery rate for English words, password search speed is over 1,500,000,000 passwords per minute.

SureZip™ Recovery decrypts Zip archives created with WinZip version 8.0 and earlier in less than an hour regardless of password used to protect it. At least 5 encrypted files are required in order to process the archive. Archives created with WinZip are supported.

Limitations

Zip compression software uses relatively strong encryption algorithm that makes instant password calculation (without knowing at least one file from the archive) impossible. Brute-force attack is the slowest approach and can test all the passwords of up to 8 characters. Xieve™ attack is much faster and is capable of recovering passwords of up to 10 characters. Dictionary attack is the fastest method - there is no limitation on password length. Known Plaintext attack instantly decrypts an archive if there is at least one file from the archive available unencrypted, regardless of the password length.
Password recovery speed for archives protected with Advanced 128-bit or 256-bit AES Encryption is very slow - about 70-80 passwords per second on average PC.