Posted on Fri 18 September 2020 in security, IT, open source
I am definitely not an expert in networking, so take all of this with some salt. Still, I found it valuable to have my home internet powered by open source software as much as possible, rather than some shitty closed black-box provided by my ISP.
There are already lots of …
Here is the pdf slides of my presentation about Meltdown, the security vulnerability. First are full slides, then real presentation slides (with stops when asking questions/pausing and pondering). Free for re-use, but nice to cite.
This version is just full slides, with no interruptions.
This version is slides with …
Posted on Sat 22 December 2018 in binary reverse, IT, security
This is a writeup for the Endless Christmas challenge, md5 hash 866c92038d6e9fc47db4424f71f6167a (download binary). It appeared in the X-MAS CTF, and it's a Reverse challenge.
Using afl with Radare we can see there are calls to write and execve, both happening in main, a sign that this program creates (and …
Posted on Tue 13 February 2018 in binary reverse, brute force, python, programming, IT, security
I was to reverse a file for a challenge, MD5 hash 85c9feed0cb0f240a62b1e50d1ab0419.
The challenge was called mio cuggino, purposefully misspelled with two g letters. It asks for three numbers. The challenge led me to a brute force of the password with a Python script, learning how to interact with a …
Posted on Thu 18 January 2018 in cryptography, IT, security
The scope of this article is to present the one time pad cipher method and its biggest vulnerability: the many time pad attack.
The one time pad is the archetype of the idea of stream cipher. It's very simple …
Posted on Sat 13 January 2018 in binary reverse, IT, security