John The Ripper 1.7.3.1 Pro

16-09-2021 admin

A fast passcode decrypting utility that was designed to help users test the strength of their passwords or recover lost passphrases

Run John the Ripper jumbo in the cloud (AWS): John the Ripper in the cloud homepage Download the latest John the Ripper core release (release notes): 1.9.0 core sources in tar.xz, 8.6 MB or tar.gz, 13 MB Development source code in CVS repository. Get John the Ripper apparel at 0-Day Clothing and support the project. John the Ripper is designed to be both feature-rich and fast. It combines several cracking modes in one program and is fully configurable for your particular needs (you can even define a custom cracking mode using the built-in compiler supporting a subset of C). Jul 13, 2017 The same as Metasploit, John the Ripper is a part of the Rapid7 family of penetration testing/ hacking tools. If you don’t know Metasploit, you can check an article titled “What is Metasploit” on infosecaddicts.com. John the Ripper was published stably in 2013 with its 1.8.0 version release.

Creating strong passwords seems like an easy task at first glance, but it may actually take more than one would expect. Since there are many programs specially created to break such locks, it's probably a good idea to actually test the strength of a passcode before using it.

Runs from a command line interface

A tool that is quite useful for this purpose is John the Ripper, a command-line utility that will also show its worth in case you need to recover a lost passkey. Since it doesn't have a GUI of its own, you will have to open a Command window and run it from there to view the parameters which can be used to carry out the process.

The actual usage procedure is quite easy and you will have to follow a simple syntax which starts with the executable of, followed by the desired options and then by the password files.

Multiple methods of recovering passwords

There are several modes in which this application can work, starting with the 'single crack' method, followed by the word list and 'incremental' ones. It is also possible to employ a so-called 'external' mode which acts like a word filter. When using John the Ripper for testing purposes, you can run the benchmarks for a specific time by providing manually the appropriate value.

A great thing about this tool is that you will be able to save sessions and restore them when necessary, using their corresponding parameters. The status of these sessions can even be printed and you also have the possibility to have the deciphered passwords displayed.

To end with

All things considered, John the Ripper could actually be one of the better choices whenever someone needs to recover a password or assess the strength of a new one without having to go through a whole series of configurations. Nonetheless, the lack of a proper interface and of more functions may certainly deter some users from utilizing it.

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John the Ripper is part of these download collections: Password Unlockers

John the Ripper was reviewed by Olivian Puha

3.0/5

New in John the Ripper 1.7.9:

Added optional parallelization of the MD5-based crypt(3) code with OpenMP.
Added optional parallelization of the bitslice DES code with OpenMP.
Replaced the bitslice DES key setup algorithm with a faster one, which
significantly improves performance at LM hashes, as well as at DES-based

Read the full changelog