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Ophcrack is a free open-source (GPL licensed) program that cracks Windows log-in passwords by using LM hashes through rainbow tables.The program includes the ability to import the hashes from a variety of formats, including dumping directly from the SAM files of Windows, and can be run via the command line or using the program’s GUI (Graphical user interface).
L0phtCrack is a password auditing and recovery application originally produced by Mudge from L0pht Heavy Industries. It is used to test password strength and sometimes to recover lost Microsoft Windows passwords, by using dictionary, brute-force, hybrid attacks, and rainbow tables. [3] The initial version was released in the Spring of 1997. [4]
One of the modes John can use is the dictionary attack. [6] It takes text string samples (usually from a file, called a wordlist, containing words found in a dictionary or real passwords cracked before), encrypting it in the same format as the password being examined (including both the encryption algorithm and key), and comparing the output to the encrypted string.
Reset a forgotten password. Use Sign-in Helper, AOL's password reset and account recovery tool, to get back in to your account. Go to the Sign-in Helper. Enter one of the account recovery items listed. Click Continue. Follow the instructions given in the Sign-in Helper. Change your password. From a desktop or mobile web browser:
There are two ways to use the program: via the standalone chntpw utility installed as a package available in most modern Linux distributions (e.g. Ubuntu [1]) or via a bootable CD/USB image. There also was a floppy release, but its support has been dropped.
Kon-Boot was originally designed as a proof of concept, freeware security tool, mostly for people who tend to forget their passwords. The main idea was to allow users to login to the target computer without knowing the correct password and without making any persistent changes to system on which it is executed.