John the Ripper 1.7.9
A fast passcode decrypting utility that was designed to help users test the strength of their passwords or recover lost passphrases
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 John the Ripper, followed by the desired options and then by the password files.
There are several modes in which this application can work, starting with the 'single crack' method, followed by the wordlist 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.
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.
Reviewed by Olivian Puha, last updated on November 14th, 2013
John the Ripper
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What's New in This Release:
- 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
Application descriptionJohn the Ripper will provide users with a fast password cracker. Its primary purpose is to detect weak Unix passwords....