Christophe CasalegnoAutoimmune warrior, Entrepreneur & Bio/Hacker

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Infosec

1 June 2026Christophe CasalegnoNo comments

I am temporarily putting my hacker hat back on

Christophe Casalegno
Following the flood of new vulnerabilities over the past few months, I decided to temporarily put my hacker hat back on and let StackX, ScalarX's managed infrastructure offering, benefit from it. The idea: strengthen the security model natively without making day-to-day operations a nightmare for clients. In the early 2000s, I designed for …
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15 February 2026Christophe CasalegnoNo comments

Release of SxTLSCheck (ScalarX TLS Checker)

SxTLSCheck
Good evening, friends, I am pleased to announce the release of SxTLSCheck (ScalarX TLS Checker). For context: when I needed to check certain aspects of an HTTPS service’s compliance or security, I previously used Qualys SSL Labs. Then one day, an (unpleasant) surprise: the test was no longer accessible (PS: it seems that it is …
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1 June 2020Christophe CasalegnoNo comments

Computer security: why are all systems vulnerable?

IT security
Computer security: why are all systems vulnerable? In this video I explain why no system in the world is invulnerable, and why it is impossible to be 100% protected against a hacker compromising a system. Watch the video on YouTube ↗ Christophe Casalegno If you want to talk tech, join me …
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22 February 2020Christophe CasalegnoNo comments

Computer viruses: the origins

In this post I am going to talk to you about computer viruses from a different angle: I am going to tell you the story of their origins. The story begins shortly after the Second World War. John Louis Von Neumann, a mathematician considered today one of the fathers of modern computing, presents a paper at a conference in Pasadena in 1948, …
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23 July 2017Christophe CasalegnoNo comments

Hackers and crackers: the differences

Hackers and crackers : the differences
Hackers, crackers, cybercriminals… Unfortunately, the media and the general public have seized on these words for more than two decades. Words, like speech, a keyboard or a knife, are powerful tools that can be used for malicious purposes just as much as to “do good”. Nowadays, as …
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2 December 2016Christophe CasalegnoNo comments

LXC: a new vulnerability? No, just a display bug!

Sometimes you discover a vulnerability when you aren’t looking for one, and sometimes, as in this case, it turns out to be a false alarm. More than 70 percent of the vulnerabilities I’ve found in my life had nothing to do with security research. I simply came across them by chance, while doing administration work, …
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10 October 2014Christophe CasalegnoNo comments

Shellshock: another patch for old Linux distributions…

Another patched version of Bash against Shellshock for outdated Linux distributions. This patch works on Mandriva 2008 to 2010.2, 64-bit OpenSUSE 12.1 Asparagus, and Red Hat Enterprise Linux Server release 5.2 (Tikanga). I’ve also made a patched version available for the 64-bit OVH Release 2 Linux distribution. To install the patched version, log in to …
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18 February 2011Christophe CasalegnoNo comments

Password cracker: new release of John the Ripper

John the Ripper is free and Open Source software, distributed primarily in source code form. John the Ripper is also a fast password cracker, currently available for many flavors of Unix, Windows, DOS, BeOS, and OpenVMS. Its primary purpose is to detect weak Unix passwords. It supports several crypt(3) password hash types commonly found on …
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15 February 2011Christophe Casalegno1 comment

New release of Armitage (graphical cyber attack management tool for Metasploit)

Armitage is a graphical cyber attack management tool for Metasploit that lets you visualize your targets, recommends exploits, and exposes the framework’s advanced capabilities. Armitage is a graphical frontend that makes Metasploit usable for people who understand hacking but haven’t mastered the Metasploit Framework . If you want to learn Metasploit and grow into the …
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Christophe Casalegno Brain 0verride

Keep it simple
and direct!