Posts by Juan Aguirre

Juan was security analyst at Fluid Attacks from March 2017 until August 2018.

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Juan Aguirre

Using JSON Web Token to send data

Here we introduce JSON Web Token, a simple, quick way to send secure, digitally signed data from one part to another via URL using a base64 algorithm to encode.

Photo by Agence Olloweb on Unsplash

Juan Aguirre

What it is and how it works

In this article, we intend to explain an approach to symbolic execution, which is very useful when dealing with software assessment.

Chess piece different from the others

Juan Aguirre

Using WS-Security to secure your web apps

In this article, we present a secure way to exchange information between different web services using the realms of the Web Service Federation (WSF).

Multiple icon accounts

Juan Aguirre

Security issues and solutions of SSO services

Here we explain how to use SAML, a popular SSO implementation standard for logging users into applications based on their sessions.

several balloons floating in the air

Juan Aguirre

Cloud based systems in healthcare and their issues

Cloud-based systems can be of great benefit to healthcare institutions, but they can also lead to security issues that must be handled and that we explain here.

Photo by Thom Milkovic on Unsplash

Juan Aguirre

Solving Halls of Valhalla Challenge: XSS4

Web security nowadays is a matter of concern. In this article, we explain how to avoid one of the most common attacks: Cross Site Scripting (XSS).

Photo by Ryoji Iwata on Unsplash

Juan Aguirre

Solving Yoire crackme average challenge

In this article, we provide a first approach to reverse engineering by solving a simple but educational cracking challenge using OllyDBG.

Photo by Bernard Hermant on Unsplash

Juan Aguirre

Solving Yashira WEP Security challenge

In this article, we explain how to crack a Wired Equivalent Privacy (WEP) algorithm by analyzing its traffic.

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