Home Cyber Security News L0phtCrack Password Auditing Tool Now Available As Open Source

L0phtCrack Password Auditing Tool Now Available As Open Source

by Abeerah Hashim
L0phtCrack tool

Developed and maintained for quite a while, the password auditing tool “L0phtCrack” now goes open source to assist the community. The developer anticipates active participation from the community in its improvement and maintenance in the future.

L0phtCrack Tool Goes Open Source

The decades-old password auditing and recovery tool L0phtCrack is now finally available for all to use as open source.

Briefly, L0phtCrack came into existence back in 1997 by a hacker group then named L0pht Heavy Industries. Specifically, the tool’s creation is attributed to Peiter C. Zatko (with alias Mudge) who later worked for Defense Advanced Research Projects Agency (DARPA), Google, and lately, Twitter.

L0phtCrack serves as a dedicated tool for assessing password strength and recovering lost passwords via brute force, dictionary attack, rainbow attack, and other techniques.

The developers continued to maintain the tool throughout the time, though with multiple changes in the ownership following acquisitions. Nonetheless, the original L0pht Heavy Industries finally reacquired the tool in July 2021.

And now, Christien Rioux (with alias ‘DilDog’ on Twitter) has announced the release of this tool as open source. Rioux also mentioned the need for active maintainers and contributors in the project.

The latest release of L0phtCrack, version 7.2.0, is now available on GitLab.

Commenting about this decision, Chris Wysopal, one of the contributors in L0pht, told The Daily Swig,

The original team found it took too much time to support part-time but not enough revenue was there to hire full-time employees or even contract employees.

Thus, the original developers expect warm participation from the community for the expansion of the scope of this tool and maintenance. According to Wysopal,

I could hope that an organization such as OWASP or similar could assist with getting motivated people involved. I think this could be a framework for more than just password cracking eventually, rather the general automation of commonly performed ‘security audit’ tasks.

For instance, the tool may be “plugged in” vulnerability scanning for password and network auditing.

Let us know your thoughts in the comments.

You may also like

Latest Hacking News

Privacy Preference Center


The __cfduid cookie is used to identify individual clients behind a shared IP address and apply security settings on a per-client basis.

cookie_notice_accepted and gdpr[allowed_cookies] are used to identify the choices made from the user regarding cookie consent.

For example, if a visitor is in a coffee shop where there may be several infected machines, but the specific visitor's machine is trusted (for example, because they completed a challenge within your Challenge Passage period), the cookie allows Cloudflare to identify that client and not challenge them again. It does not correspond to any user ID in your web application, and does not store any personally identifiable information.

__cfduid, cookie_notice_accepted, gdpr[allowed_cookies]


DoubleClick by Google refers to the DoubleClick Digital Marketing platform which is a separate division within Google. This is Google’s most advanced advertising tools set, which includes five interconnected platform components.

DoubleClick Campaign Manager: the ad-serving platform, called an Ad Server, that delivers ads to your customers and measures all online advertising, even across screens and channels.

DoubleClick Bid Manager – the programmatic bidding platform for bidding on high-quality ad inventory from more than 47 ad marketplaces including Google Display Network.

DoubleClick Ad Exchange: the world’s largest ad marketplace for purchasing display, video, mobile, Search and even Facebook inventory.

DoubleClick Search: is more powerful than AdWords and used for purchasing search ads across Google, Yahoo, and Bing.

DoubleClick Creative Solutions: for designing, delivering and measuring rich media (video) ads, interactive and expandable ads.



The _ga is asssociated with Google Universal Analytics - which is a significant update to Google's more commonly used analytics service. This cookie is used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page request in a site and used to calculate visitor, session and campaign data for the sites analytics reports. By default it is set to expire after 2 years, although this is customisable by website owners.

The _gat global object is used to create and retrieve tracker objects, from which all other methods are invoked. Therefore the methods in this list should be run only off a tracker object created using the _gat global variable. All other methods should be called using the _gaq global object for asynchronous tracking.

_gid works as a user navigates between web pages, they can use the gtag.js tagging library to record information about the page the user has seen (for example, the page's URL) in Google Analytics. The gtag.js tagging library uses HTTP Cookies to "remember" the user's previous interactions with the web pages.

_ga, _gat, _gid