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Sergio de los Santos

Innovation and Labs Leader at Telefónica Tech. He holds a bachelor’s degree in Computer System Engineering and a master’s degree in Software Engineering and Artificial Intelligence from the University of Málaga.



A man using Chrome browser in a laptop
Sergio de los Santos

0days in numbers: Chrome, Windows, Exchange… What are attackers and manufacturers looking for?

Very interesting data from Google’s Project Zero, which tries to catalogue, find and disseminate 0days. They do not discover them directly, but “detect” them in any manufacturer when they...
Man searching in Google. Photo: Unsplash
Sergio de los Santos

Google takes a step forward to improve Certificate Transparency’s ecosystem: No dependence on Google

Google will change certificate transparency requirements to make it more independent of itself
Sergio de los Santos

Chronicle Of the Attack on A Youtuber Who Knew About Cyber Security

The news recently broke: youtubers with the largest number of followers are being targeted for extortion. The attacks are on the rise and the techniques are not new, but...
printnightmare
Sergio de los Santos

Frequently Asked Questions About Printnightmare (CVE-2021-34527)

We are going to try to clarify some common doubts about this vulnerability, since it has turned up with some confusing data about whether it was patched or not,...
Ransomware cyber security
Sergio de los Santos

What On Earth Is Going on With Ransomware And Why We Won’t Stop It Any Time Soon

In the last few months, it is not rare that every now and then we read about a large company that has fallen victim to ransomware, either brought to...
Cyber Security White House
Sergio de los Santos

And the President Said, “Enough Is Enough”. The New Cyber Security Proposals from The White House

Joe Biden has signed an Executive Order to improve national cyber security and protect federal government networks more efficiently. The attack on oil pipeline operator Colonial Pipeline, a story...
26 Reasons Why Chrome Does Not Trust the Spanish CA Camerfirma
Sergio de los Santos

26 Reasons Why Chrome Does Not Trust the Spanish CA Camerfirma

From the imminent version 90, Chrome will show a certificate error when a user tries to access any website with a certificate signed by Camerfirma. Perhaps it is not...
The Attack on SolarWinds Reveals Two Nightmares: What Has Been Done Right and What Has Been Done Wrong
Sergio de los Santos

The Attack on SolarWinds Reveals Two Nightmares: What Has Been Done Right and What Has Been Done Wrong

All cyber security professionals now know at least part of what was originally thought to be “just” an attack on SolarWinds, which has just truned out to be one...
Tell Me What Data You Request from Apple and I Will Tell You What Kind of Government You Are
Sergio de los Santos

Tell Me What Data You Request from Apple and I Will Tell You What Kind of Government You Are

We recently found out that Spain sent 1,353 government requests for access to Facebook user data in the first half of 2020. Thanks to Facebook’s transparency report for the...
A Simple Explanation About SAD DNS and Why It Is a Disaster (or a Blessing)
Sergio de los Santos

A Simple Explanation About SAD DNS and Why It Is a Disaster (or a Blessing)

In 2008, Kaminsky shook the foundations of the Internet. A design flaw in the DNS made it possible to fake responses and send a victim wherever the attacker wanted....

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