Blog

Distributed k-nn graphs and similarity search

Today we are presenting distributed k nearest neighbors (k-nn) graphs and similarity search algorithms at the ULB.

Modify your static IP on Ubuntu server

This seems easy, but... When you modify your static IP address in /etc/network/interfaces, the old IP is not removed. The new IP is simply added to your interface.

Disable user registration in your Laravel application

Laravel is a powerful framework that comes with a lot of boilerplate code to handle most common cases. One of these is users management (register, login, reset password etc.)

Easy testing with Python doctest and GitLab

When developing some new Python code, you will usually open another terminal to test your function or class using a Python shell... and repeat until you obtain the expected result.

Type hinting in Python, and testing with GitLab

Python is a dynamically typed language, meaning that the type of a variable can change during execution. This participates to the user friendliness of the language.

Collecting and processing NetFlow on Ubuntu

NetFlow is a feature that was introduced on Cisco routers around 1996 that provides the ability to collect and process network traffic summary.

CyberSecurity Tournament 2020

In February 2020, ULB will organize a CyberSecurity Tournament for students. This is a unique opportunity to challenge your skills and get in touch with major companies of the field.

Create a local Python pip repository

Python is a very interesting programming language because it is possible to prototype a lot of things in a few minutes. The Python Package manager, called pip, is a very simple tool that allows the user to import/install easily any Python package and its dependencies.

Create a local apt-mirror for offline usage

In some cases, it is necessary to work on offline machines because of sensitive data for example. To install a Ubuntu version on an offline computer is quite easy. Problems begin when it is needed to install some programs/debian packages for your development. With the default configuration, it is not possible to install anything without an Internet connection.

Generate ROC curve and compute AUC in Java

It is very common to implement a model to classify elements in different categories. A very important step in classification is the evaluation of the model efficiency.

MongoDB sharding on a single server

Sharding is a method for distributing data (and load) across multiple machines. In this blog post we show how to test MongoDB sharding by running multiple MongoDB instances on a single Ubuntu 16.04 machine.

Apache Spark MapReduce with PHP

When it comes to Big Data processing, I'm a huge fan of the Apache Spark project. Spark is a very powerful tool to analyse very large datasets in parallel, and at the same time it provides a nice API that allows to write clean distributed code.

How does work WPA/WPA2 WiFi security and how crack it?

The number of Wi-Fi access points is bigger day after day. Everywhere in the street, it is possible to see a lot of Access Point (AP)

How to upload your files to Nextcloud "File Drop" using curl

Nextcloud is a great tool for self-hosting your data in the vein of Dropbox. It facilitates exchange of information and files in a team, with the extra benefit of providing a robust monitoring and protection capabilities. There are Nextcloud clients available for Windows, Linux and MacOS, which are easy to install and use. With one click you can upload your files to your personal cloud and share them. But sometimes the need arises to upload files from machines that don't use a Graphical user Interface (for example Ubuntu Server distribution). Luckily there exists a way to still be able to upload your files to Nextcloud using the command line and Curl.

Publishing your Python project to the PyPI repository

Sometimes we might want to play with python scripts that are usefull for us when ran locally. But othertimes the script you have been playing with starts to be more and more important and involved in different projects. In such cases it is an interessting option to upload the python script to an internet repository so it can easily be accessed by you, your team members or other people that might need the same functionalities your script offers.

Running GITLAB Tests locally with Docker CE

The possibility to test integration on our projects when using Gitlab gives us a powerful testing tool to be sure that the code we submit to the repository will work as intended and wont break anything. The way that Gitlab does Continuous Integration (CI) tests is by using Docker containers that can be deployed at demand to test specific aspects of our project.

Using LaBrea Tarpit to hinder network scans

When hackers prepare a network attack, they usually start with a network scan to detect running computers and installed software.

BeMilCIS2019 : Blockchain for dummies

Today we are proud to present a paper at BeMilCIS conference entitled Blockchain for dummies

A simple java implementation of Blockchain

Blockchain is currently a very hot research topic. To understand how it works and what it can achieve, here is a simple java implementation.

Blockchain

These last few years everyone everywhere went crazy about cryptocurrencies and more in particular about Bitcoin. The value of the star cryptocurrency did indeed sky-rocket in December 2017 to 19.783$, a 1824% increase in less than a year [2]. However, even though everybody has probably heard about this digital currency, it's likely that very few understand the fascinating technology behind it called blockchain.

ICMCIS2019

This week we presented two papers at the International Conference on Military Communications and Information Systems (ICMCIS) in Budva, Montenegro:

Automatic release with GitLab and SimpleRepos

SimpleRepos is a simple file sharing website that allows to upload files using a REST API. Here is how to use it in conjunction with GitLab to automatically release your binaries...

Using PHP CodeSniffer in a Laravel project

PHP CodeSniffer is a great tool that enforces everybody is using the same coding standard when contributing to a project. For a Laravel project, there are however a few caveats to handle...

Using font awesome in a Laravel project

Font Awesome is a fantastic icon set to improve your web application. The integration in Laravel requires a few additional steps...

Avoid leaking secrets in your GitLab repository

Shit happens! Chances are great that you or one of the developers in your team will one day commit a file containing secrets or private keys to a public GIT repository...

Automatic bug detection with SpotBugs and Maven

SpotBugs is a fantastic tool to help you write beter java code! It performs static code analysis (SA) and uses a database of more then 400 bug patterns to detect potential bugs in your code.

GitLab : Automatically testing your Python project

Whatever programming language your are using for your project, GitLab continuous integration system (gitlab-ci) is a fantastic tool that allows you to automatically run tests when code is pushed to your repository. Java, PHP, Go, Python or even LaTeX, no limit here! In this blog post we review a few examples for the Python programming language.

ECHO Project : Kick Off Meeting

ECHO (European network of Cybersecurity centres and competence Hub for innovation and Operations) is a project funded by the European Commission to establish and operate a Cybersecurity Competence Network. The project was officially launched today at the Conference Hall of the Royal Military Academy, in the presence of the 30 participating institutions.

Using GridFS to store files in MongoDB (Java)

MongoDB is a fantastic tool for storing large quantities of data in a JSON-like format.

Maven not running all JUnit tests

Here is a trick for solving a tricky and vicious maven bug...

Installing NextCloud Ubuntu client

Phising with 2FA bypass using Evilginx

Phising is a well-known method used by hackers to steal usernames and passwords by imitating a website.

An introduction to Laravel ORM : Eloquent

When working with an object oriented language, like PHP, Java or Python, an Object-Relational Mapping (ORM) tool allows to automatically convert model objects into rows in a database and vice-versa. It allows to easily save objects in a database, without worrying about writing appropriate SQL requests.

Using Laravel with a SQLite database

For a development environment or for small web applications, a SQLite database may be perfectly sufficient to store your data. It is also much lighter than a full blown MySQL database.

Using custom Docker images with GitLab

One of the interesting features of GitLab is the possibility to automatically run tests when code is pushed to the repository (Continus Integration): https://cylab.be/blog/7/gitlab-quickstart

GitLab : Quickstart

GitLab is a git repository management tool, like GitHub or BitBucket. Like them, it offers issue tracking and wikis. However, GitLab also offers some very powerful features like Continuous Integration (CI) and Continuous Delivery (CD).

A java introduction to OrientDB document database

OrientDB is a NoSQL document database, like the very popular MongoDB. It has some very interesting additional features:

Students projects 2017-2018

Today 6 students from the Master in CyberSecurity presented their project:

ICMCIS 2018

We are proud to present 2 papers at the International Conference on Military Communications and Information Systems (ICMCIS) in Warsaw: