Amazon
Secure MCP
A practical guide for people shipping MCP servers in production. Code, auth, permissions and what almost nobody gets right.
Books, talks, research
Publications
Here is what I have written, spoken and published.
I put the books first, then the talks, and the research at the end.
Books
Amazon
¿Cuántas APIs tienes realmente?
Half of organizations do not know how many APIs they run. How to find and manage the ones nobody documented, with open source and low cost tools. For tech leads and architects tired of finding surprise APIs in production.
ePub
Hacking and IPv4 packet manipulation with SCAPY
How to build and manipulate an IPv4 packet by hand. For people who want to understand the protocol. It has no recipes.
Talks
RootedCON
MCP Enterprise Security: A Practical Architecture and Lessons to Avoid Being Pwned
A practical security architecture for MCP in the enterprise and what we've learned so you don't get compromised. With Alfonso Muñoz
RootedCON
When MCP goes Wrong - Que MCP no rompa tu seguridad
Security in Model Context Protocol (MCP): how design and implementation mistakes can compromise your infrastructure. With Alfonso Muñoz
RootedCON
Censorship, privacy and the fine art of disappearing without trace
Privacy techniques, censorship, anonymity and robust cryptography. With Dr. Alfonso Muñoz
Navaja Negra
Doing fun things with databases
Unconventional ways to exploit databases, beyond deleting data or stealing information
RootedCON
AWS, with its lambdas and its little things
Real AWS Lambda examples: good, bad and terrible practices. With César Gallego
Navaja Negra
Protect your Python... because if it's as bad as it sounds, better nobody sees it
Techniques to protect Python code, from basic methods to building custom Python interpreters
Navaja Negra
Protecting Python Source Code
Techniques to protect Python source code when you publish it, from the simplest to compiling your own Python interpreter
PyConES
Asyncio in production: what nobody tells you
What I've learned using Python Asyncio in production, processing millions of events per day: the good, the bad and the ugly
RSA Conference
Spreading Application Security Ownership Across the Entire Organization
How to spread the responsibility for application security across the whole organization instead of leaving it only with the security team
RootedCON
From the Heaven to Hell in the CI/CD
Critical vulnerabilities in CI/CD pipelines and how an attacker can compromise your whole development and deployment process
RootedCON
Crawlino: The New Level of Crawling Systems
A high-performance distributed crawling system to scout and analyze web applications at scale
RootedCON
Docker Might Not Be Your Friend - Trojanizing Docker Images
How to trojanize Docker images and why your container registry can end up being your worst enemy
OWASP Madrid
I Meetup OWASP Madrid
Technical talk on web application security at the first meetup of the OWASP Madrid chapter
RootedCON
Broker & MQ Injection
I introduce the Broker Injection concept and Enteletaor, a tool to inject, extract and modify information in brokers like Redis, RabbitMQ or ZeroMQ
Cybercamp
Python, Hacking and Sec-tools from the Trenches
Hands-on workshop on building security tools with Python, from basic scripts to professional tools
Codemotion
Your DevOp Gives Me Work: I'm a Security Auditor
How DevOps teams are creating new attack vectors and vulnerabilities that we security auditors end up having to fix
Papers
Research
LAPIS: Lightweight API Specification for Intelligent Systems
A new format for describing APIs, built for LLMs. It uses 85.5% fewer tokens than OpenAPI YAML and 88.6% fewer than OpenAPI JSON, tested on GitHub, Twilio and DigitalOcean APIs.
Research
Slow JSON Stream: A Low-Bandwidth Denial-of-Service Attack Against HTTP APIs with JSON Request Bodies
DoS attack that needs very little bandwidth, against HTTP APIs that accept JSON bodies. The attacker opens an HTTP/1.1 chunked connection and drips a valid JSON prefix at one byte per second, never sending the closing token. 90% of 41 evaluated targets are vulnerable under default configuration.